{"product_id":"mini-pwm-12v-dc-fan-speed-controller-3a-adjustable-regulator","title":"Mini PWM 12V DC Fan Speed Controller – 3A Adjustable Module","description":"\n\u003ch2\u003eMini PWM DC Fan Speed Controller – Precision 4-Wire Fan Control\u003c\/h2\u003e\n\u003cp\u003eTake full command of your 12V four-wire PWM fans with this compact, high-quality DC fan speed controller. Built for hobbyists, PC builders, and electronics enthusiasts, this single-board module delivers smooth, adjustable speed control via a simple potentiometer — no complicated wiring required. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This PWM Fan Speed Controller?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Speed Range:\u003c\/strong\u003e Full PWM output from 0% to 100%, giving you complete control over fan speed for cooling and noise management.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In On\/Off Switch:\u003c\/strong\u003e Conveniently cut power to the fan without disconnecting any wiring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable Performance:\u003c\/strong\u003e Metal construction with reliable circuitry ensures consistent, long-lasting operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple Wiring:\u003c\/strong\u003e Red and black input leads with a standard 2510-4P CPU\/chassis fan output connector (2.54mm pin pitch) — plug in and go.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart Speed Trim:\u003c\/strong\u003e A dedicated onboard potentiometer lets you fine-tune the minimum start-up speed (0%–60% range) for your specific fan.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Timing Fan Support:\u003c\/strong\u003e Short the onboard (PF) solder point to reverse the PWM direction — compatible with reverse-timing fans after simple modification.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Compact Size:\u003c\/strong\u003e At just 2.5 × 2 cm, this module fits in the tightest of builds and enclosures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V (works in 8–15V range)\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 (limited by switch and connector)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Idle Draw\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 Mode\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\u003eStart Position Trim 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 \u0026amp; black leads \/ 2510-3P output (optional)\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 pitch (CPU\/chassis fan socket)\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    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eImportant Notes Before You Buy\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e⚠️ This controller is designed \u003cstrong\u003eexclusively for 4-wire, 12V PWM fans\u003c\/strong\u003e (e.g. CPU fans, chassis fans). It is \u003cstrong\u003eNOT compatible\u003c\/strong\u003e with 2-wire or 3-wire fans.\u003c\/li\u003e\n  \u003cli\u003eAlways match the fan voltage to the power supply voltage.\u003c\/li\u003e\n  \u003cli\u003eTurn off power before making any adjustments to the (PF) solder point to avoid component damage.\u003c\/li\u003e\n  \u003cli\u003ePotentiometer: turn counter-clockwise to minimum\/off, clockwise for maximum output.\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\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more guidance on safe electronics handling and DIY circuit best practices, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Motor_controller\" target=\"_blank\" rel=\"noopener\"\u003eMotor controller\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Will this PWM fan speed controller work with my 3-wire or 2-wire fan?\u003c\/h4\u003e\n\u003cp\u003eA: No. This module is specifically designed for \u003cstrong\u003e4-wire PWM fans\u003c\/strong\u003e operating at 12V. It controls fan speed via the dedicated PWM signal wire found only on 4-wire fans. Standard 2-wire and 3-wire fans do not have this signal wire and cannot be controlled by this module.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage does this DC fan speed controller support?\u003c\/h4\u003e\n\u003cp\u003eA: The module operates on DC 12V and is compatible with a supply voltage range of 8–15V. Always ensure your fan's rated voltage matches your power supply to avoid damage.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I set the minimum start speed on this controller?\u003c\/h4\u003e\n\u003cp\u003eA: There is a small trimmer potentiometer on the board dedicated to start-speed adjustment (range: 0%–60%). Use a small screwdriver to fine-tune it so your fan spins up reliably from a standstill when you first turn the controller on.\u003c\/p\u003e\n\u003ch4\u003eQ: My fan speed changes in the opposite direction when I turn the knob — what should I do?\u003c\/h4\u003e\n\u003cp\u003eA: Your fan is likely a reverse-timing PWM fan. With the power disconnected, use solder to short the (PF) pad on the board. This reverses the PWM direction, allowing the potentiometer to control a reverse-timing fan in the correct direction.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Will this PWM fan speed controller work with my 3-wire or 2-wire fan?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. This module is specifically designed for 4-wire PWM fans operating at 12V. It controls fan speed via the dedicated PWM signal wire found only on 4-wire fans. 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Use a small screwdriver to fine-tune it so your fan spins up reliably from a standstill when you first turn the controller on.\"}}, {\"@type\": \"Question\", \"name\": \"My fan speed changes in the opposite direction when I turn the knob — what should I do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Your fan is likely a reverse-timing PWM fan. With the power disconnected, use solder to short the (PF) pad on the board. This reverses the PWM direction, allowing the potentiometer to control a reverse-timing fan in the correct direction.\"}}]}\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:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Mini PWM 12V DC Fan Speed Controller – 3A Adjustable Module\", \"item\": \"https:\/\/oasis-select.com\/products\/mini-pwm-12v-dc-fan-speed-controller-3a-adjustable-regulator\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Default Title","offer_id":47755452383337,"sku":"\u003cnone\u003e","price":7.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/Sf7b773df3d104138ac58575841edc209O.webp?v=1783269349","url":"https:\/\/oasis-select.com\/products\/mini-pwm-12v-dc-fan-speed-controller-3a-adjustable-regulator","provider":"Oasis Select","version":"1.0","type":"link"}