{"product_id":"12v-dc-4-wire-pwm-fan-speed-controller-rotary-switch-module","title":"12V DC 4-Wire PWM Fan Speed Controller | Rotary Switch Module","description":"\n\u003ch2\u003eGaqqee 12V DC Four-Wire PWM Fan Speed Controller\u003c\/h2\u003e\n\u003cp\u003eTake full control of your 12V four-wire PWM fans with the \u003cstrong\u003eGaqqee PWM Fan Speed Controller Module\u003c\/strong\u003e. Featuring a smooth rotary switch, this compact board lets you dial fan speed from fully off to 100% output — ideal for PC chassis fans, CPU coolers, and custom cooling builds. CE and RoHS certified for peace of mind.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Speed Range:\u003c\/strong\u003e PWM output from 0% (off) to 100% for precise airflow management\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOn\/Off Switch Built-In:\u003c\/strong\u003e Rotary potentiometer turns fully counter-clockwise to switch the fan completely off\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Start-Up Speed:\u003c\/strong\u003e Onboard trimmer resistor lets you set the initial spin-up speed at power-on\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse-Sequence Fan Support:\u003c\/strong\u003e Solder-bridge the (PF) pad to invert PWM signal direction for non-standard fans\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Connector:\u003c\/strong\u003e 2510-4P staggered pinout (2.54 mm pitch) — plug-and-play with most CPU and chassis fan headers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Self-Consumption:\u003c\/strong\u003e PCB draws less than 20 mA with no fan connected\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium Build Quality:\u003c\/strong\u003e CE \u0026amp; RoHS certified; stable performance across its full operating range\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 (8–15V range; match fan voltage)\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 (expandable via separate power cable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePCB Self-Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;20 mA (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 \/ 25 kHz\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\u003eInitial PWM Adjustment 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\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed (+) and Black (−) wires\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 staggered, 2.54 mm pin pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE, RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC Motor\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 China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eVerify correct polarity and that your power supply voltage matches the fan's rated voltage.\u003c\/li\u003e\n  \u003cli\u003eConnect power (red = positive, black = negative) and plug the fan into the 4-pin output connector.\u003c\/li\u003e\n  \u003cli\u003eTurn the rotary knob clockwise to increase fan speed; fully counter-clockwise switches the fan off.\u003c\/li\u003e\n  \u003cli\u003eUse the small onboard trimmer to fine-tune the initial speed when the controller is first powered on.\u003c\/li\u003e\n  \u003cli\u003eIf fan speed moves in the wrong direction, solder-bridge the \u003cstrong\u003e(PF)\u003c\/strong\u003e pad (power disconnected first!) to reverse the PWM signal for reverse-sequence fans.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eImportant Compatibility Note\u003c\/h3\u003e\n\u003cp\u003eThis controller is designed \u003cstrong\u003eexclusively for 12V four-wire PWM fans\u003c\/strong\u003e (e.g., standard CPU and chassis fans with PWM support). It is \u003cstrong\u003enot compatible\u003c\/strong\u003e with two-wire or three-wire fans.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× PWM Fan Speed Control Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou Might Also Like\u003c\/h3\u003e\n\u003cp\u003eLooking for other quality products? Check out the \u003ca href=\"\/products\/ancient-nutrition-multi-collagen-advanced-muscle-60-capsules\"\u003eAncient Nutrition Multi Collagen Advanced Muscle 60 Capsules\u003c\/a\u003e or explore the \u003ca href=\"\/products\/bu-29mm-sinking-minnow-jerkbait-fishing-lure-bass-trout-pike\"\u003eB\u0026amp;U 29mm Sinking Minnow Jerkbait Lure\u003c\/a\u003e for your next hobby project.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What type of fans are compatible with this PWM fan speed controller?\u003c\/h4\u003e\n\u003cp\u003eA: This 12V DC PWM fan speed controller is compatible exclusively with 12V four-wire fans that support PWM speed control, such as standard CPU coolers and PC chassis fans. It cannot regulate two-wire or three-wire fans, so please confirm your fan's wiring before purchasing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this controller with a power supply other than 12V?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the module operates within an 8V to 15V DC input range, though the nominal operating voltage is 12V. Always ensure your fan's rated voltage matches your power supply voltage to avoid damage.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What should I do if my fan speeds up when I turn the knob counter-clockwise (reverse behavior)?\u003c\/h4\u003e\n\u003cp\u003eA: This indicates a reverse-sequence fan. You can correct this by solder-bridging the (PF) setting pad on the PCB. Always disconnect power completely before soldering to prevent damage to the module or fan.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I turn the fan completely off using this module?\u003c\/h4\u003e\n\u003cp\u003eA: Simply rotate the potentiometer (rotary switch) fully counter-clockwise. The PWM output will drop to 0%, switching the connected fan off entirely without cutting power to the module itself.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of fans are compatible with this PWM fan speed controller?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This 12V DC PWM fan speed controller is compatible exclusively with 12V four-wire fans that support PWM speed control, such as standard CPU coolers and PC chassis fans. 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