{"product_id":"300w-20a-dc-dc-buck-converter-6-40v-step-down-voltage-regulator-module","title":"ALLOYSEED 300W 20A DC Buck Converter 6-40V Step Down Module","description":"\u003ch2\u003eALLOYSEED 300W 20A DC-DC Step Down Buck Converter — Precision Voltage \u0026amp; Current Regulation\u003c\/h2\u003e\n\u003cp\u003eTake control of your power requirements with the \u003cstrong\u003eALLOYSEED 300W 20A DC-DC Step Down Buck Converter\u003c\/strong\u003e. Whether you're powering electronics projects, charging systems, LED drivers, or motor controllers, this high-efficiency voltage regulator module delivers stable, adjustable output from \u003cstrong\u003e6–40V input down to 1.2–35V output\u003c\/strong\u003e — all with up to \u003cstrong\u003e96% efficiency\u003c\/strong\u003e. Built for makers, engineers, and hobbyists alike, it's a reliable, versatile constant current\/constant voltage (CC\/CV) power solution.\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 Voltage Range:\u003c\/strong\u003e Accepts 6V–40V DC input (10V–40V recommended), with fully adjustable output voltage from 1.2V to 35V DC — ideal for a broad range of applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e Achieves up to 96% conversion efficiency (95% tested at 24V→12V, 20A), minimizing heat generation and energy waste.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e75V\/80A Dual MOSFET Design:\u003c\/strong\u003e Dual high-current MOSFETs ensure robust, reliable performance under heavy loads, even in demanding continuous-use scenarios.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Frequency Low-Resistance Electrolytic Capacitors:\u003c\/strong\u003e Both input and output use premium capacitors to minimize ripple (≤50mV) and deliver stable, clean output power.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstant Current (CC) \u0026amp; Constant Voltage (CV) Modes:\u003c\/strong\u003e Adjustable current limit from 0.2A to 20A makes this perfect for battery charging, LED driving, and motor control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge 30A Screw Terminals:\u003c\/strong\u003e Secure, easy-to-wire terminals accommodate thick gauge wire for high-current connections without hassle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Heat Sinks:\u003c\/strong\u003e Two integrated heat sinks improve thermal management for stable operation across a wide range of input\/output voltage differentials.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort Circuit Protection:\u003c\/strong\u003e Self-recovery protection guards against short circuits (avoid prolonged short-circuit conditions).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple Potentiometer Adjustment:\u003c\/strong\u003e Clockwise increases voltage\/current; counter-clockwise decreases — intuitive and quick to set up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\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;\"\u003e6V – 40V DC (10V–40V recommended)\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;\"\u003e1.2V – 35V DC (adjustable)\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;\"\u003e20A max (15A recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCurrent Limit Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e0.2A – 20A\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\u003eMax Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e300W\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eUp to 96% (95% @ 24V→12V, 20A)\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 Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e150 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\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≤50mV\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\u003eLow Voltage Drop\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e3V minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eShort Circuit Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eSelf-recovery\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\u003eWiring Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eScrew terminal (30A rated)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e60 × 53 × 30 mm (2.36 × 2.09 × 1.18 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\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eNew\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;\"\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× DC-DC Step Down Buck Converter Module (300W \/ 20A)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/100w-dual-port-car-charger-starlink-mini-fast-charging\"\u003e100W Dual-Port Car Charger – Fast Charging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder – Screw Type\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFurther Reading\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical safety standards and best practices when working with DC power electronics, refer to the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety guidelines\u003c\/a\u003e. Proper wiring and load management are critical when using high-current modules like this converter.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the maximum 20A and the recommended 15A output current?\u003c\/h4\u003e\n\u003cp\u003eA: The module is rated for a maximum output current of 20A, but for sustained, long-term use we recommend operating at 15A or below. Running at or near the 20A maximum for extended periods generates additional heat and can stress components over time. Staying at 15A provides a reliable safety margin and extends the module's operational life.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this buck converter be used for lithium battery charging?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Because this module supports both Constant Current (CC) and Constant Voltage (CV) modes with adjustable current limiting (0.2A–20A), it is well-suited for charging lithium-ion or LiPo battery packs when configured to the correct voltage and current for your specific battery. Always verify your battery's exact charge voltage and current requirements before use.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I adjust the output voltage and current?\u003c\/h4\u003e\n\u003cp\u003eA: The module features two potentiometers — one for voltage and one for current. Turn clockwise to increase the value and counter-clockwise to decrease it. For best results, set the output voltage first (with no load), then adjust the current limit to your desired maximum. Use a multimeter to confirm settings before connecting sensitive loads.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this step-down converter need an external heat sink or fan?\u003c\/h4\u003e\n\u003cp\u003eA: The module comes with two integrated heat sinks that handle typical operating loads efficiently. However, if you are operating near maximum current (20A) or with a large differential between input and output voltage, adding active cooling (a small fan) is recommended to prevent thermal throttling and ensure stable performance.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the minimum input-to-output voltage difference required?\u003c\/h4\u003e\n\u003cp\u003eA: This buck converter requires a minimum voltage drop of 3V between input and output. For example, if you need a 12V output, your input must be at least 15V. Keep this in mind when selecting your power supply to ensure the module operates correctly.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the maximum 20A and the recommended 15A output current?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module is rated for a maximum output current of 20A, but for sustained, long-term use we recommend operating at 15A or below. Running at or near the 20A maximum for extended periods generates additional heat and can stress components over time. Staying at 15A provides a reliable safety margin and extends the module's operational life.\"}}, {\"@type\": \"Question\", \"name\": \"Can this buck converter be used for lithium battery charging?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Because this module supports both Constant Current (CC) and Constant Voltage (CV) modes with adjustable current limiting (0.2A–20A), it is well-suited for charging lithium-ion or LiPo battery packs when configured to the correct voltage and current for your specific battery. Always verify your battery's exact charge voltage and current requirements before use.\"}}, {\"@type\": \"Question\", \"name\": \"How do I adjust the output voltage and current?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module features two potentiometers — one for voltage and one for current. Turn clockwise to increase the value and counter-clockwise to decrease it. For best results, set the output voltage first (with no load), then adjust the current limit to your desired maximum. Use a multimeter to confirm settings before connecting sensitive loads.\"}}, {\"@type\": \"Question\", \"name\": \"Does this step-down converter need an external heat sink or fan?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module comes with two integrated heat sinks that handle typical operating loads efficiently. However, if you are operating near maximum current (20A) or with a large differential between input and output voltage, adding active cooling (a small fan) is recommended to prevent thermal throttling and ensure stable performance.\"}}, {\"@type\": \"Question\", \"name\": \"What is the minimum input-to-output voltage difference required?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This buck converter requires a minimum voltage drop of 3V between input and output. For example, if you need a 12V output, your input must be at least 15V. Keep this in mind when selecting your power supply to ensure the module operates correctly.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"france","offer_id":47710889115753,"sku":"200007763:201336342","price":24.93,"currency_code":"USD","in_stock":true},{"title":"United States","offer_id":47710889148521,"sku":"200007763:201336106","price":28.2,"currency_code":"USD","in_stock":true},{"title":"spain","offer_id":47710889181289,"sku":"200007763:201336104","price":21.94,"currency_code":"USD","in_stock":true},{"title":"Australia","offer_id":47710889214057,"sku":"200007763:201336099","price":23.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S96785205d0eb43cab1923a494ef8057c0.webp?v=1782062553","url":"https:\/\/oasis-select.com\/products\/300w-20a-dc-dc-buck-converter-6-40v-step-down-voltage-regulator-module","provider":"Oasis Select","version":"1.0","type":"link"}