{"product_id":"3a-dc-dc-buck-converter-module-5v-30v-to-3-3v-5v-12v-step-down","title":"3A DC-DC Buck Converter Module 5V-30V to 3.3V\/5V\/12V Step Down","description":"\u003ch2\u003e3A DC-DC Step Down Buck Converter Module — Reliable Voltage Regulation for DIY \u0026amp; Pro Projects\u003c\/h2\u003e\n\u003cp\u003eNeed a compact, efficient power solution for your electronics project? The \u003cstrong\u003eALLOYSEED 3A DC-DC Buck Converter Module\u003c\/strong\u003e steps down input voltages from 5V–30V to selectable outputs of 3.3V, 5V, or 12V with up to \u003cstrong\u003e96% conversion efficiency\u003c\/strong\u003e. Whether you're powering a surveillance camera, a custom DIY build, or a mobile charging device, this little board delivers stable, reliable power in a tiny 17.5 × 12 mm footprint.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Range:\u003c\/strong\u003e Accepts DC 5V–30V input (input must exceed the selected output voltage).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Output:\u003c\/strong\u003e Selectable fixed output voltages — 3.3V, 5V, or 12V — to suit a variety of applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e Up to 96% conversion efficiency minimizes heat and energy waste.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable Output:\u003c\/strong\u003e Output accuracy of ±0.1V and ripple \u0026lt;30mV keep sensitive electronics safe.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Compact Design:\u003c\/strong\u003e At just 17.5 × 12 mm, it integrates easily into tight enclosures and PCB assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Temperature Range:\u003c\/strong\u003e Operates reliably from −40°C to +85°C — suitable for harsh environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow No-Load Draw:\u003c\/strong\u003e Less than 1mA idle current conserves battery in portable applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003eDC 5V – 30V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e3.3V \/ 5V \/ 12V (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e3A Maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eConversion Efficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003eUp to 96%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Ripple\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u0026lt;30mV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e±0.1V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eNo-Load Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u0026lt;1mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e−40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e20% – 90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eModule Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e17.5 × 12 mm (0.69 × 0.47 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003eALLOYSEED\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY mobile power supplies \u0026amp; portable battery packs\u003c\/li\u003e\n  \u003cli\u003eSurveillance \u0026amp; security camera power regulation\u003c\/li\u003e\n  \u003cli\u003eChildren's ride-on car \u0026amp; stroller power systems\u003c\/li\u003e\n  \u003cli\u003eAutomotive \u0026amp; vehicle electronics power conversion\u003c\/li\u003e\n  \u003cli\u003eCommunication \u0026amp; radio equipment power supply\u003c\/li\u003e\n  \u003cli\u003eArduino, Raspberry Pi \u0026amp; other microcontroller projects\u003c\/li\u003e\n  \u003cli\u003eCustom PCB and embedded system power rails\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × ALLOYSEED 3A DC-DC Buck Converter Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cp\u003eInput voltage must always be higher than the selected output voltage. Due to different monitor settings and lighting conditions, the actual appearance of the item may vary slightly from product images. Please allow a 1–2 mm difference in measurements due to manual measurement.\u003c\/p\u003e\n\n\u003cp\u003eFor electrical safety best practices and guidance on electronic components, refer to the U.S. Consumer Product Safety Commission — Electrical Safety.\u003c\/p\u003e\n\n\u003cp\u003eYou may also be interested in these related products from our store:\u003cbr\u003e\n\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder 5x20mm \u0026amp; 6x30mm Screw\u003c\/a\u003e\u003cbr\u003e\n\u003ca href=\"\/products\/100w-dual-port-car-charger-starlink-mini-fast-charging\"\u003e100W Dual-Port Car Charger – Fast Charging\u003c\/a\u003e\n\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage range does this DC-DC buck converter module support?\u003c\/h4\u003e\n\u003cp\u003eA: The module accepts a DC input voltage between 5V and 30V. The key requirement is that your input voltage must always be higher than your chosen output voltage (3.3V, 5V, or 12V) for proper step-down operation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this buck converter module with an Arduino or Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This module is a popular choice for powering Arduino, Raspberry Pi, and other microcontroller boards. Select the 5V output for most standard boards and enjoy stable, regulated power with up to 3A current delivery.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I select the output voltage (3.3V, 5V, or 12V)?\u003c\/h4\u003e\n\u003cp\u003eA: The output voltage is set via a configuration jumper or solder pad on the board (depending on the version). Refer to the module markings or included documentation to select your desired output before connecting to your circuit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this buck converter module safe for use in automotive or outdoor applications?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. With an operating temperature range of −40°C to +85°C and a stable output with low ripple (\u0026lt;30mV), this module is well-suited for automotive, outdoor surveillance, and other demanding environments. Always ensure proper wiring and fusing for vehicle installations.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What input voltage range does this DC-DC buck converter module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module accepts a DC input voltage between 5V and 30V. The key requirement is that your input voltage must always be higher than your chosen output voltage (3.3V, 5V, or 12V) for proper step-down operation.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use this buck converter module with an Arduino or Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. This module is a popular choice for powering Arduino, Raspberry Pi, and other microcontroller boards. Select the 5V output for most standard boards and enjoy stable, regulated power with up to 3A current delivery.\"}}, {\"@type\": \"Question\", \"name\": \"How do I select the output voltage (3.3V, 5V, or 12V)?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The output voltage is set via a configuration jumper or solder pad on the board (depending on the version). Refer to the module markings or included documentation to select your desired output before connecting to your circuit.\"}}, {\"@type\": \"Question\", \"name\": \"Is this buck converter module safe for use in automotive or outdoor applications?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. With an operating temperature range of −40°C to +85°C and a stable output with low ripple (\u0026lt;30mV), this module is well-suited for automotive, outdoor surveillance, and other demanding environments. Always ensure proper wiring and fusing for vehicle installations.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"5V \/ United States","offer_id":47710863622249,"sku":"14:29#5V;200007763:201336106","price":20.91,"currency_code":"USD","in_stock":true},{"title":"12V \/ United States","offer_id":47710863655017,"sku":"14:94#12V;200007763:201336106","price":20.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S1042f671e78a4a7da249d3775923807b9.webp?v=1782061199","url":"https:\/\/oasis-select.com\/products\/3a-dc-dc-buck-converter-module-5v-30v-to-3-3v-5v-12v-step-down","provider":"Oasis Select","version":"1.0","type":"link"}