{"id":9402,"date":"2025-09-03T13:49:15","date_gmt":"2025-09-03T05:49:15","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=9402"},"modified":"2026-08-31T14:17:38","modified_gmt":"2026-08-31T06:17:38","slug":"how-to-select-an-ac-dc-power-supply","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/","title":{"rendered":"Come selezionare un alimentatore AC-DC?"},"content":{"rendered":"<p>Gli alimentatori sono gli eroi non celebrati dei sistemi elettronici, spesso trascurati ma di fondamentale importanza per le prestazioni e l'affidabilit\u00e0. La scelta dell 'alimentatore sbagliato pu\u00f2 portare a guasti del sistema, rischi per la sicurezza e maggiori costi operativi. Questa guida completa fornisce informazioni dettagliate sulla scelta del sistema ottimale. <a href=\"https:\/\/www.wehopower.com\/it\/products\/\" target=\"_blank\" rel=\"noopener\">Alimentazione AC-DC<\/a> per le vostre specifiche esigenze applicative.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Sommario<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Attiva\/disattiva Sommario\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Attiva\/disattiva<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#What_is_an_AC-DC_Power_Supply\" >Che cosa \u00e8 un alimentatore AC-DC?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Key_Considerations_When_Selecting_an_AC-DC_Power_Supply\" >Considerazioni chiave nella scelta di un alimentatore AC-DC<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step-by-Step_Selection_Guide\" >Guida alla selezione passo dopo passo<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_1_Define_Your_Power_Requirements\" >Step 1: Definisci i tuoi requisiti di potenza<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_2_Determine_Input_Voltage_Specifications\" >Passo 2: Determinare le specifiche di tensione di ingresso<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_3_Select_Appropriate_Output_Characteristics\" >Fase 3: Selezionare le caratteristiche di output appropriate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_4_Evaluate_Environmental_Factors\" >Fase 4: Valutazione dei fattori ambientali<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_5_Review_Safety_and_Regulatory_Requirements\" >Fase 5: Rivedere i requisiti di sicurezza e normativi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_6_Consider_Physical_Constraints\" >Passo 6: Considera i vincoli fisici<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Step_7_Analyze_Cost_vs_Performance_Trade-offs\" >Passo 7: Analizzare i costi vs. Trade-off delle prestazioni<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Efficiency_Heat_Management\" >Efficienza e gestione del calore<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Safety_Protection_Features\" >Caratteristiche di sicurezza e protezione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Size_Form_Factor_Installation\" >Dimensioni, fattore di forma e installazione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Cost_vs_Performance_Balance\" >Costo vs Performance Balance<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Linear_vs_Switching_AC-DC_Power_Supplies\" >Lineare vs Switching alimentatori AC-DC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Application-Based_Selection_Guide\" >Guida alla selezione basata sulle applicazioni<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Industrial_Applications\" >Applicazioni industriali<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Medical_Applications\" >Applicazioni mediche<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#TelecommunicationsNetworking\" >telecomunicazioni\/networking<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Consumer_Electronics\" >Elettronica di consumo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Lighting_Applications\" >Applicazioni di illuminazione<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Tips_for_Choosing_a_Reliable_AC-DC_Power_Supply\" >Suggerimenti per la scelta di un alimentatore AC-DC affidabile<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#Conclusion\" >Conclusione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/#FAQs\" >Domande frequenti<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_an_AC-DC_Power_Supply\"><\/span><strong><b>Che cosa \u00e8 un alimentatore AC-DC?<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Un alimentatore AC-DC \u00e8 un dispositivo che converte la corrente alternata (AC) da una presa a muro in corrente continua stabile (DC) necessaria per alimentare i circuiti elettronici. <a href=\"https:\/\/www.wehopower.com\/it\/products\/\" target=\"_blank\" rel=\"noopener\">alimentatori<\/a> assicurare che i dispositivi elettronici ricevano la tensione e la corrente corrette di cui hanno bisogno per funzionare in modo sicuro ed efficiente.<\/p>\n<p>Esistono due tipi principali di alimentatori AC-DC:<\/p>\n<p><strong><b>Alimentatori lineari<\/b><\/strong>Questi utilizzano trasformatori per abbassare la tensione e sono noti per l'uscita pulita con basso rumore, ma tendono ad essere pi\u00f9 grandi, meno efficienti e adatti per applicazioni a bassa potenza.<\/p>\n<p><strong><b>alimentatori switching (SMPS)<\/b><\/strong>Questi utilizzano tecniche di commutazione ad alta frequenza per convertire la potenza, con conseguente maggiore efficienza, dimensioni pi\u00f9 ridotte e peso pi\u00f9 leggero.<\/p>\n<p>Gli alimentatori switching offrono in genere un 'efficienza pi\u00f9 elevata (spesso 85 - 94% o superiore), fattori di forma pi\u00f9 piccoli e una migliore redditivit\u00e0 per la maggior parte delle applicazioni, specialmente a livelli di potenza pi\u00f9 elevati.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/it\/product\/lrh-50-380vac-input-voltage-ac-to-dc-switching-power-supply\/attachment\/lrh-50-380vac-input-voltage-ac-to-dc-switching-power-supply-2\/\" target=\"_blank\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-8176 size-full\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/06\/LRH-50-380VAC-Input-Voltage-Ac-to-Dc-Switching-Power-Supply-2.jpg?quality=85&strip=all\" alt=\"How to Select an AC-DC Power Supply?  title=\" width=\"1000\" height=\"1000\" how to select an ac-dc power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/06\/LRH-50-380VAC-Input-Voltage-Ac-to-Dc-Switching-Power-Supply-2.jpg?quality=85&strip=all 1000w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/06\/LRH-50-380VAC-Input-Voltage-Ac-to-Dc-Switching-Power-Supply-2-300x300.jpg?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/06\/LRH-50-380VAC-Input-Voltage-Ac-to-Dc-Switching-Power-Supply-2-500x500.jpg?quality=85&strip=all 500w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/06\/LRH-50-380VAC-Input-Voltage-Ac-to-Dc-Switching-Power-Supply-2-768x768.jpg?quality=85&strip=all 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<p>Saperne di pi\u00f9: <a href=\"https:\/\/www.wehopower.com\/it\/news\/ac-vs-dc-power-supplies\/\" target=\"_blank\" rel=\"noopener\">AC vs DC Power Supplies Alimentazione<\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Key_Considerations_When_Selecting_an_AC-DC_Power_Supply\"><\/span><strong><b>Considerazioni chiave nella scelta di un alimentatore AC-DC<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>La scelta del giusto alimentatore AC-DC comporta la valutazione di diversi fattori critici per garantire prestazioni, sicurezza e affidabilit\u00e0 ottimali per la specifica applicazione.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step-by-Step_Selection_Guide\"><\/span><strong><b>Guida alla selezione passo dopo passo<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Segui questo approccio sistematico per assicurarti di selezionare l'alimentatore giusto per le tue esigenze:<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Step_1_Define_Your_Power_Requirements\"><\/span><strong><b>Step 1: Definisci i tuoi requisiti di potenza<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Calcolare il fabbisogno energetico totale (Volt \u00d7 Ampere = Watt)<\/li>\n<li>Aggiungere un margine di sicurezza di 20 - 30% per l'espansione futura<\/li>\n<li>Richieste di potenza di picco vs. continue<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Step_2_Determine_Input_Voltage_Specifications\"><\/span><strong><b>Passo 2: Determinare le specifiche di tensione di ingresso<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Identificare gli standard di tensione della propria regione (100 - 120VAC o 220 - 240VAC)<\/li>\n<li>Input universale (85 - 264VAC) per applicazioni globali<\/li>\n<li>Valutare la necessit\u00e0 di capacit\u00e0 di ingresso DC<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Step_3_Select_Appropriate_Output_Characteristics\"><\/span><strong><b>Fase 3: Selezionare le caratteristiche di output appropriate<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Scegli uscite singole, doppie o multiple in base alle esigenze<\/li>\n<li>Determinare i requisiti di tensione e corrente per ogni uscita<\/li>\n<li>Considerare requisiti speciali come la corrente costante per le applicazioni LED<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Step_4_Evaluate_Environmental_Factors\"><\/span><strong><b>Fase 4: Valutazione dei fattori ambientali<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Valutazione del range di temperatura operativa<\/li>\n<li>Considerare umidit\u00e0, altitudine e condizioni di vibrazione<\/li>\n<li>Determinare la necessaria protezione in ingresso (grado IP)<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Step_5_Review_Safety_and_Regulatory_Requirements\"><\/span><strong><b>Fase 5: Rivedere i requisiti di sicurezza e normativi<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Identificare le certificazioni di sicurezza necessarie (UL, CE, TUV, ecc.)<\/li>\n<li>Determinare gli standard specifici del settore (medico, industriale, ecc.)<\/li>\n<li>Evaluate isolation requirements<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Step_6_Consider_Physical_Constraints\"><\/span><strong><b>Passo 6: Considera i vincoli fisici<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Measure available space for power supply<\/li>\n<li>Determine mounting preferences (PCB, chassis, DIN rail)<\/li>\n<li>Evaluate thermal management requirements<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Step_7_Analyze_Cost_vs_Performance_Trade-offs\"><\/span><strong><b>Passo 7: Analizzare i costi vs. Trade-off delle prestazioni<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Compare initial cost against efficiency savings<\/li>\n<li>Evaluate reliability and warranty terms<\/li>\n<li>Consider total cost of ownership<\/li>\n<\/ul>\n<h3><strong><b><a href=\"https:\/\/www.wehopower.com\/it\/product\/psc-250-12v-24v-ac-to-dc-ups-3-years-warranty-switching-power-supply\/attachment\/%e7%ac%ac1%e9%a1%b5-1-9\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone wp-image-7653 size-full\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/03\/\u7b2c1\u9875-1-8.png?quality=85&strip=all\" alt=\"How to Select an AC-DC Power Supply?  title=\" width=\"440\" height=\"357\" how to select an ac-dc power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/03\/\u7b2c1\u9875-1-8.png?quality=85&strip=all 440w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/03\/\u7b2c1\u9875-1-8-300x243.png?quality=85&strip=all 300w\" sizes=\"(max-width: 440px) 100vw, 440px\" \/><\/a><\/b><\/strong><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"Efficiency_Heat_Management\"><\/span><strong><b>Efficienza e gestione del calore<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Efficiency significantly impacts thermal performance and operating costs:<\/p>\n<p><strong><b>Efficiency Ratings<\/b><\/strong>: Higher efficiency (90%+) means less energy wasted as heat and lower operating costs. For example, a 90% efficient 100W power supply wastes 10W as heat, while an 85% efficient unit wastes 15W.<\/p>\n<p><strong><b>Gestione termica<\/b><\/strong>: Consider your cooling options\u2014natural convection, forced air, or conduction cooling\u2014based on your application&#8217;s environment and thermal requirements.<\/p>\n<p>Here&#8217;s a typical efficiency comparison for different power levels:<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong><b>Potenza Range<\/b><\/strong><\/td>\n<td><strong><b>Typical Efficiency<\/b><\/strong><\/td>\n<td><strong><b>Recommended Topology<\/b><\/strong><\/td>\n<td><strong><b>Applicazioni<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>Low Power (&lt;100W)<\/td>\n<td>85-90%<\/td>\n<td>Flyback<\/td>\n<td>Consumer electronics, small devices<\/td>\n<\/tr>\n<tr>\n<td>Medium Power (100-1000W)<\/td>\n<td>90-94%<\/td>\n<td>LLC, Forward<\/td>\n<td>Industrial equipment, communications<\/td>\n<\/tr>\n<tr>\n<td>High Power (&gt;1000W)<\/td>\n<td>92-96%<\/td>\n<td>Full-bridge LLC, Phase-shift full-bridge<\/td>\n<td>Servers, large power control systems<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Safety_Protection_Features\"><\/span><strong><b>Caratteristiche di sicurezza e protezione<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Safety is paramount, especially for medical and industrial applications:<\/p>\n<p><strong><b>Isolamento<\/b><\/strong>: Isolation voltage between input and output (typically 3000VAC or higher) provides safety protection and noise isolation.<\/p>\n<p><strong><b>Protection Circuits<\/b><\/strong>: Look for overvoltage protection (OVP), overcurrent protection (OCP), short circuit protection (SCP), and overtemperature protection (OTP).<\/p>\n<p><strong><b>Safety Certifications<\/b><\/strong>: Ensure the power supply has appropriate certifications for your region and application (UL, CE, TUV, etc.) and industry-specific certifications like IEC 60601-1 for medical equipment.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Size_Form_Factor_Installation\"><\/span><strong><b>Dimensioni, fattore di forma e installazione<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Physical considerations are often crucial, especially in space-constrained applications:<\/p>\n<p><strong><b>Form Factors<\/b><\/strong>: Common options include open frame, U-channel, enclosed, and modular configurations.<\/p>\n<p><strong><b>Mounting Options<\/b><\/strong>: Consider PCB mount, chassis mount, DIN rail mount, or rack mount based on your application needs.<\/p>\n<p><strong><b>Dimensioni<\/b><\/strong>: Ensure the power supply fits your available space, considering both the unit itself and needed clearance for ventilation.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"79\"><strong><b>Packaging Type<\/b><\/strong><\/td>\n<td><strong><b>EMI Performance<\/b><\/strong><\/td>\n<td width=\"109\"><strong><b>Space Requirement<\/b><\/strong><\/td>\n<td width=\"101\"><strong><b>Gestione termica<\/b><\/strong><\/td>\n<td width=\"89\"><strong><b>Cost Structure<\/b><\/strong><\/td>\n<td width=\"213\"><strong><b>Suitable Applications<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"79\">Power Modules<\/td>\n<td>Medium-High<\/td>\n<td width=\"109\">Small size<\/td>\n<td width=\"101\">Relies on conduction cooling<\/td>\n<td width=\"89\">Medium<\/td>\n<td width=\"213\">Industrial control, automotive, humid environments<\/td>\n<\/tr>\n<tr>\n<td width=\"79\">Open Frame<\/td>\n<td>Poorer<\/td>\n<td width=\"109\">Smallest size<\/td>\n<td width=\"101\">Good natural convection but needs protection<\/td>\n<td width=\"89\">Lowest<\/td>\n<td width=\"213\">Space-constrained, cost-sensitive applications<\/td>\n<\/tr>\n<tr>\n<td width=\"79\">U-Bracket<\/td>\n<td>Medium<\/td>\n<td width=\"109\">Balanced space and installation<\/td>\n<td width=\"101\">Metal base helps heat transfer<\/td>\n<td width=\"89\">Medium<\/td>\n<td width=\"213\">Industrial equipment, communications<\/td>\n<\/tr>\n<tr>\n<td width=\"79\">Enclosed<\/td>\n<td>Best<\/td>\n<td width=\"109\">Largest volume<\/td>\n<td width=\"101\">Good convection and grounding heat dissipation<\/td>\n<td width=\"89\">Highest<\/td>\n<td width=\"213\">Medical equipment, high-interference environments<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Cost_vs_Performance_Balance\"><\/span><strong><b>Costo vs Performance Balance<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Finding the right balance between cost and performance is essential:<\/p>\n<p><strong><b>Initial Cost vs Operating Cost<\/b><\/strong>: Higher efficiency units may cost more initially but save money through reduced energy consumption<\/p>\n<p><strong><b>Quality vs Price<\/b><\/strong>: Cheaper power supplies may use lower-quality components that fail sooner<\/p>\n<p><strong><b>Total Cost of Ownership<\/b><\/strong>: Consider warranty, reliability, maintenance, and energy costs over the product&#8217;s lifespan<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Linear_vs_Switching_AC-DC_Power_Supplies\"><\/span><strong><b>Lineare vs Switching alimentatori AC-DC<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Understanding the differences between these two technologies is fundamental to making the right choice:<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong><b>Caratteristica<\/b><\/strong><\/td>\n<td><strong><b>Alimentatori lineari<\/b><\/strong><\/td>\n<td><strong><b>Alimentatori a commutazione<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>Operating Principle<\/td>\n<td>Transformer-based voltage step-down<\/td>\n<td>High-frequency switching conversion<\/td>\n<\/tr>\n<tr>\n<td>Efficienza<\/td>\n<td>Typically 40-60%<\/td>\n<td>Typically 80-95%<\/td>\n<\/tr>\n<tr>\n<td>Size and Weight<\/td>\n<td>Larger and heavier<\/td>\n<td>Smaller and lighter<\/td>\n<\/tr>\n<tr>\n<td>Complexity<\/td>\n<td>Simpler design<\/td>\n<td>More complex design<\/td>\n<\/tr>\n<tr>\n<td>EMI Noise<\/td>\n<td>Low electromagnetic noise<\/td>\n<td>Higher noise, requires filtering<\/td>\n<\/tr>\n<tr>\n<td>Cost<\/td>\n<td>Lower for low power<\/td>\n<td>More cost-effective for higher power<\/td>\n<\/tr>\n<tr>\n<td>Thermal Output<\/td>\n<td>Higher waste heat<\/td>\n<td>Lower waste heat<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For most modern applications, switching power supplies are preferred due to their higher efficiency, smaller size, and better cost-effectiveness at higher power levels. Linear regulators are mainly reserved for specialized applications requiring extremely low noise and ripple.<\/p>\n<h2><strong><b><a href=\"https:\/\/www.wehopower.com\/it\/product\/psc-60-12v-24v-ac-to-dc-ups-3-years-warranty-switching-power-supply\/attachment\/%e7%ac%ac1%e9%a1%b5-1-6\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"alignnone wp-image-7642 size-full\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/03\/\u7b2c1\u9875-1-5.png?quality=85&strip=all\" alt=\"How to Select an AC-DC Power Supply?  title=\" width=\"416\" height=\"355\" how to select an ac-dc power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/03\/\u7b2c1\u9875-1-5.png?quality=85&strip=all 416w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/03\/\u7b2c1\u9875-1-5-300x256.png?quality=85&strip=all 300w\" sizes=\"(max-width: 416px) 100vw, 416px\" \/><\/a><\/b><\/strong><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"Application-Based_Selection_Guide\"><\/span><strong><b>Guida alla selezione basata sulle applicazioni<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Different applications have unique requirements that dictate specific power supply features:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Industrial_Applications\"><\/span><strong><b>Applicazioni industriali<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Requirements<\/b><\/strong>: Wide temperature range, high reliability, resistance to vibration and contamination<\/p>\n<p><strong><b>Key Features<\/b><\/strong>: DIN rail mounting, conformal coating, wide input voltage range, high efficiency<\/p>\n<p><strong><b>Standard<\/b><\/strong>: IEC\/UL\/EN 62368-1, IEC\/EN 60335-1<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Medical_Applications\"><\/span><strong><b>Applicazioni mediche<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Requirements<\/b><\/strong>: Patient safety, low leakage currents, high reliability<\/p>\n<p><strong><b>Key Features<\/b><\/strong>: 2xMOPP isolation, low earth leakage current (&lt;300\u03bcA), BF rating for patient-connected applications<\/p>\n<p><strong><b>Standard<\/b><\/strong>: IEC 60601-1, 3rd edition<\/p>\n<h3><span class=\"ez-toc-section\" id=\"TelecommunicationsNetworking\"><\/span><strong><b>telecomunicazioni\/networking<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Requirements<\/b><\/strong>: High efficiency, power density, wide input voltage range<\/p>\n<p><strong><b>Key Features<\/b><\/strong>: High power density (up to 50W\/in\u00b3), efficiency &gt;90%, -48VDC input option<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Consumer_Electronics\"><\/span><strong><b>Elettronica di consumo<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Requirements<\/b><\/strong>: Cost-effectiveness, safety, efficiency regulations<\/p>\n<p><strong><b>Key Features<\/b><\/strong>: Compact size, meeting energy efficiency standards (Energy Star, ErP), safety certifications<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lighting_Applications\"><\/span><strong><b>Applicazioni di illuminazione<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Requirements<\/b><\/strong>: Constant current output, dimming capability, high efficiency<\/p>\n<p><strong><b>Key Features<\/b><\/strong>: LED drivers with PWM dimming, high power factor (&gt;0.9), surge protection<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tips_for_Choosing_a_Reliable_AC-DC_Power_Supply\"><\/span><strong><b>Suggerimenti per la scelta di un alimentatore AC-DC affidabile<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>Consider Operating Environment<\/b><\/strong>: Will the power supply operate in harsh conditions? Choose appropriately rated units for extreme temperatures, humidity, or vibration.<\/p>\n<p><strong><b>Plan for Thermal Management<\/b><\/strong>: Ensure adequate cooling through heatsinking, ventilation, or forced air based on the power supply&#8217;s thermal requirements.<\/p>\n<p><strong><b>Verify Certification Marks<\/b><\/strong>: Look for relevant safety certifications (UL, TUV, etc.) for your region and application to ensure compliance.<\/p>\n<p><strong><b>Check Vendor Reputation and Support<\/b><\/strong>: Choose established manufacturers with good technical support and documentation.<\/p>\n<p><strong><b>Review Test and Validation Reports<\/b><\/strong>: Request validation test reports for critical parameters like efficiency, ripple, and transient response.<\/p>\n<p><strong><b>Consider Future Needs<\/b><\/strong>: Select a power supply with some headroom (20-30%) for future expansion or design changes.<\/p>\n<p><strong><b>Evaluate Total Cost of Ownership<\/b><\/strong>: Consider not just purchase price but also energy costs, cooling requirements, and potential downtime over the product&#8217;s lifetime.<\/p>\n<p><strong><b>Request Samples<\/b><\/strong>: Test candidate power supplies in your actual application under various operating conditions.<\/p>\n<p>Saperne di pi\u00f9:\u00a0<a href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-better-understand-ac-dc-power-supplies\/\" target=\"_blank\" rel=\"noopener\">Come comprendere meglio le forniture CA CC<\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong><b>Conclusione<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Selezionando il diritto <a href=\"https:\/\/www.wehopower.com\/it\/products\/\" target=\"_blank\" rel=\"noopener\">Alimentazione AC-DC<\/a> requires considering input voltage, output power, efficiency, safety, size, and environmental conditions. The cheapest option may not be the most cost-effective in the long term. A higher-quality, efficient supply may cost more initially but save on energy, offer better reliability, and last longer. Proper thermal management and derating can also extend the life of both the power supply and the equipment it powers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><strong>Domande frequenti<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Qual \u00e8 la differenza tra AC e DC?<\/strong><\/p>\n<p><b><span class=\"citation-13\">AC (Alternating Current)<\/span><\/b><span class=\"citation-13 citation-end-13\"> is the type of electricity you get from a wall outlet.<\/span> Its direction of flow changes constantly. <b><span class=\"citation-12\">DC (Direct Current)<\/span><\/b><span class=\"citation-12 citation-end-12\"> flows in a single, constant direction and is what most electronic components, like microchips and batteries, need to operate.<\/span> An AC-DC power supply converts one into the other.<\/p>\n<p><strong>How do I calculate my power needs?<\/strong><\/p>\n<p><span class=\"citation-11\">To calculate your total power need, multiply the voltage (V) by the current (A) of your circuit: <\/span><b><span class=\"citation-11\">Power (Watts) = Volts \u00d7 Amps<\/span><\/b><span class=\"citation-11 citation-end-11\">.<\/span> It&#8217;s always a good idea to add a <b>20-30% safety margin<\/b> to your calculation to account for future expansion or unexpected power spikes.<\/p>\n<p><strong>Why is a power supply&#8217;s efficiency important?<\/strong><\/p>\n<p>A power supply&#8217;s efficiency rating tells you how much of the input power is converted into usable output power, with the rest being wasted as heat. A higher efficiency rating means less energy is wasted, which translates to lower electricity bills and less heat generated. This reduced heat can improve the longevity and reliability of your entire system.<\/p>\n<p><strong>What is an IP rating?<\/strong><\/p>\n<p><span class=\"citation-10\">UN <\/span><b><span class=\"citation-10\">Ingress Protection (IP)<\/span><\/b><span class=\"citation-10 citation-end-10\"> rating is an international standard that classifies the degree of protection provided by an enclosure against the intrusion of foreign objects (like dust) and moisture (water).<\/span> <span class=\"citation-9 citation-end-9\">For example, an IP67-rated power supply is completely protected against dust and can withstand being submerged in up to 1 meter of water for 30 minutes.<\/span><\/p>\n<p><strong>What are safety certifications, and why do they matter?<\/strong><\/p>\n<p>Safety certifications like <b>UL (U.S.)<\/b>, <b>CE (Europe)<\/b>, and <b>TUV (Germany)<\/b> indicate that a power supply has been tested and meets specific safety standards for its intended use. <span class=\"citation-8 citation-end-8\">Using a certified power supply is crucial for ensuring the safety of users and preventing hazards like electric shock or fire.<\/span> It also ensures your product is compliant with local regulations.<\/p>","protected":false},"excerpt":{"rendered":"<p>Power supplies are the unsung heroes of electronic systems &#8211; often overlooked but fundamentally important to performance and reliability. Choosing the wrong power supply can lead to system failures, safety hazards, and increased operational costs. This comprehensive guide provides detailed insights into selecting the optimal AC-DC power supply for your specific application needs. What is&hellip; <a class=\"more-link\" href=\"https:\/\/www.wehopower.com\/it\/news\/how-to-select-an-ac-dc-power-supply\/\">Continua a leggere <span class=\"screen-reader-text\">Come selezionare un alimentatore AC-DC?<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":8175,"parent":0,"menu_order":219,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,148],"class_list":["post-9402","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-industry-news","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/9402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/comments?post=9402"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/9402\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media\/8175"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media?parent=9402"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news_category?post=9402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}