{"product_id":"mini-3a-pwm-12v-dc-fan-speed-controller-4-wire-regulator","title":"Mini 3A PWM 12V DC Fan Speed Controller – 4-Wire Regulator","description":"\u003ch2\u003eMini PWM DC Fan Speed Controller – Compact \u0026amp; Precise\u003c\/h2\u003e\n\u003cp\u003eTake full control of your 12V four-wire PWM fans with this compact, high-quality \u003cstrong\u003eMini 3A PWM DC Fan Speed Controller\u003c\/strong\u003e. Built for electronics enthusiasts, PC builders, and DIY tinkerers, this tiny module (just 2.5 × 2 cm) delivers smooth, adjustable fan speed from 0% to 100% output — all from a simple potentiometer twist. It features an onboard on\/off switch, stable PWM signal at 5V\/25KHz, and a standard 2510-4P output connector compatible with most CPU and chassis fans.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Speed Control:\u003c\/strong\u003e Potentiometer dial adjusts PWM output from 0% to 100% — turn counterclockwise to minimum, clockwise to maximum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In On\/Off Switch:\u003c\/strong\u003e Easily cut power to the fan without unplugging anything\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart Speed Trimmer:\u003c\/strong\u003e Onboard mini adjustable resistor lets you set the minimum startup speed independently\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Fan Compatibility:\u003c\/strong\u003e Short the (PF) solder point to reverse the PWM signal direction — supports reverse-timing fans\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Connector:\u003c\/strong\u003e 2510-4P output (2.54mm pin spacing) fits conventional CPU and chassis fan sockets\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Input:\u003c\/strong\u003e Red\/black wire or 2510-3P input options\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Idle Draw:\u003c\/strong\u003e Circuit board consumes less than 20mA when no fan is connected\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Metal Construction:\u003c\/strong\u003e Sturdy build in a compact, lightweight form factor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V (range: 8V–15V)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Fan Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Idle Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;20mA (no fan connected)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePWM Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V \/ 25KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePWM Output Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0% – 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStartup PWM Adjust Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0% – 60%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed\/Black wire or 2510-3P (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2510-4P, 2.54mm pin spacing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 × 2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1× Speed Control Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eImportant Usage Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThis controller is designed \u003cstrong\u003eexclusively for 12V 4-wire PWM fans\u003c\/strong\u003e (CPU fans, chassis fans). It \u003cstrong\u003ecannot\u003c\/strong\u003e control 2-wire or 3-wire fans.\u003c\/li\u003e\n  \u003cli\u003eAlways match the fan voltage to the supply voltage (8–15V range).\u003c\/li\u003e\n  \u003cli\u003eObserve correct polarity (positive\/negative) before connecting power.\u003c\/li\u003e\n  \u003cli\u003eWhen shorting the (PF) pad for reverse fans, \u003cstrong\u003ealways disconnect power first\u003c\/strong\u003e to avoid component damage.\u003c\/li\u003e\n  \u003cli\u003eColours of the physical item may vary slightly from product images due to monitor brightness and lighting conditions. Minor dimensional tolerances may apply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExplore More Electronics \u0026amp; Tools\u003c\/h3\u003e\n\u003cp\u003eLooking for more electronics accessories? Check out our \u003ca href=\"\/products\/1-4-inch-npt-nickel-plated-brass-air-compressor-tank-fill-valve\"\u003e1\/4\" NPT Nickel Plated Brass Air Compressor Tank Fill Valve\u003c\/a\u003e or the versatile \u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-tool\"\u003e1\/4\" Hex Shank Wire Twister Drill Attachment\u003c\/a\u003e for your next DIY project.\u003c\/p\u003e\n\n\u003cp\u003eFor more information on electrical safety standards and best practices when working with DC electronics, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What type of fans is this PWM DC fan speed controller compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This controller is designed specifically for \u003cstrong\u003e12V 4-wire PWM fans\u003c\/strong\u003e, such as standard CPU coolers and PC chassis fans with a 2510-4P connector and 2.54mm pin spacing. It is \u003cstrong\u003enot compatible\u003c\/strong\u003e with 2-wire or 3-wire fans, as those do not use a PWM signal for speed regulation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I adjust the fan speed using this controller?\u003c\/h4\u003e\n\u003cp\u003eA: Simply turn the potentiometer dial — rotate \u003cstrong\u003ecounterclockwise\u003c\/strong\u003e to reduce fan speed (down to 0% \/ off position) and \u003cstrong\u003eclockwise\u003c\/strong\u003e to increase speed up to 100% maximum output. There is also a small onboard trimmer resistor that lets you set the minimum startup speed independently, giving you fine-tuned control over how your fan behaves when first switched on.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the (PF) solder point do, and when should I use it?\u003c\/h4\u003e\n\u003cp\u003eA: The (PF) pad reverses the direction of the PWM signal. If your fan speeds up when you turn the dial counterclockwise (i.e., the adjustment direction is reversed), your fan uses a reverse-timing PWM protocol. Shorting the (PF) pad with solder inverts the signal so the dial behaves as expected. \u003cstrong\u003eAlways disconnect power before soldering\u003c\/strong\u003e to avoid damaging the module or the fan.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this controller work with voltages other than 12V?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the module operates within a range of \u003cstrong\u003e8V to 15V DC\u003c\/strong\u003e, though it is optimised for 12V. Make sure your fan's rated voltage matches your power supply voltage. The maximum supported fan current is 3A; if your fan draws more, run a separate power lead directly to the fan and use this module only for the PWM signal wire.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of fans is this PWM DC fan speed controller compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This controller is designed specifically for 12V 4-wire PWM fans, such as standard CPU coolers and PC chassis fans with a 2510-4P connector and 2.54mm pin spacing. It is not compatible with 2-wire or 3-wire fans, as those do not use a PWM signal for speed regulation.\"}}, {\"@type\": \"Question\", \"name\": \"How do I adjust the fan speed using this controller?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Simply turn the potentiometer dial — rotate counterclockwise to reduce fan speed (down to 0% \/ off position) and clockwise to increase speed up to 100% maximum output. There is also a small onboard trimmer resistor that lets you set the minimum startup speed independently, giving you fine-tuned control over how your fan behaves when first switched on.\"}}, {\"@type\": \"Question\", \"name\": \"What does the (PF) solder point do, and when should I use it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The (PF) pad reverses the direction of the PWM signal. If your fan speeds up when you turn the dial counterclockwise (i.e., the adjustment direction is reversed), your fan uses a reverse-timing PWM protocol. 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The maximum supported fan current is 3A; if your fan draws more, run a separate power lead directly to the fan and use this module only for the PWM signal wire.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Mini 3A PWM 12V DC Fan Speed Controller – 4-Wire Regulator\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/products\/mini-3a-pwm-12v-dc-fan-speed-controller-4-wire-regulator\"}]}\u003c\/script\u003e","brand":"Zpaxo","offers":[{"title":"Default Title","offer_id":54188873810230,"sku":"\u003cnone\u003e","price":7.56,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7774\/3158\/files\/Sf7b773df3d104138ac58575841edc209O.webp?v=1783269357","url":"https:\/\/0i45ne-c8.myshopify.com\/products\/mini-3a-pwm-12v-dc-fan-speed-controller-4-wire-regulator","provider":"Zpaxo","version":"1.0","type":"link"}