{"product_id":"pwm-fan-speed-controller-dc-12v-3a-4-wire-digital-display","title":"PWM Fan Speed Controller DC 12V 3A – 4-Wire Digital Display","description":"\n\u003ch2\u003eTake Full Control of Your Cooling System\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePWM Fan Speed Controller\u003c\/strong\u003e is a compact, intelligent module that lets you precisely manage the speed of your 4-wire DC 12V fans. Whether you're building a custom PC, managing a server rack, or optimizing an electronics cooling enclosure, this controller delivers accurate temperature-based speed regulation with a clear digital display — all in a space-saving form factor.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmart PWM Control:\u003c\/strong\u003e Accurately adjusts 4-wire PWM fan speeds to maintain optimal airflow while keeping noise and power consumption to a minimum.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital Display:\u003c\/strong\u003e Real-time readout of both temperature and fan speed, so you can monitor performance at a glance without guesswork.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow-Temperature Auto Shutoff:\u003c\/strong\u003e Automatically powers down the fan when temperatures drop below a set threshold — saving energy and reducing wear.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Design:\u003c\/strong\u003e At just 6 × 2.88 × 1.92 cm, this controller fits neatly inside tight spaces such as PC cases, compact enclosures, or DIY cooling builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works with most 12V \/ 3A chassis fans and air-cooling setups. Supports reverse timing fans. \u003cem\u003eNote: 2-wire and 3-wire fans are not compatible.\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Setup:\u003c\/strong\u003e Convenient wiring layout and plug-and-play design make installation quick, even for beginners.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Temperature Probe:\u003c\/strong\u003e The included remote probe lets you sense temperatures right at the source for precise, responsive control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFan Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Wire PWM fans only\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 × 2.88 × 1.92 cm (approx. 2.36 × 1.13 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDigital (temperature \u0026amp; speed)\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\u003eMainland 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 × PWM Fan Speed Controller Module\u003c\/li\u003e\n  \u003cli\u003e1 × Temperature Probe\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Please allow 1–2 cm variance due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/silicone-cable-ties-reusable-cord-organizers-10-pack\"\u003e10-Pack Silicone Cable Ties – Reusable Cord Organizers\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/screw-extractor-drill-bit-set-carbon-steel-double-sided\"\u003eScrew Extractor Drill Bit Set 5 \u0026amp; 6 Pc – Carbon Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/adjustable-label-roll-holder-3d-printed-thermal-printer-stand\"\u003eAdjustable Label Roll Holder – 3D Printed Thermal Printer Stand\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is this PWM fan speed controller compatible with 2-wire or 3-wire fans?\u003c\/h4\u003e\n\u003cp\u003eA: No — this controller is designed exclusively for \u003cstrong\u003e4-wire PWM fans\u003c\/strong\u003e. Using it with 2-wire or 3-wire fans will not work correctly. Please check your fan's connector type before purchasing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the digital display show on this fan controller?\u003c\/h4\u003e\n\u003cp\u003eA: The built-in digital display shows both the \u003cstrong\u003ecurrent temperature\u003c\/strong\u003e (read via the included probe) and the \u003cstrong\u003efan speed\u003c\/strong\u003e in real time, making it easy to monitor your cooling system's performance at a glance.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this DC 12V fan speed controller automatically turn off the fan?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The controller features a \u003cstrong\u003elow-temperature auto shutoff\u003c\/strong\u003e function. When the ambient temperature detected by the probe drops below your set threshold, the fan will automatically power down — saving energy and extending fan life.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum load this fan controller can handle?\u003c\/h4\u003e\n\u003cp\u003eA: This controller supports fans rated up to \u003cstrong\u003eDC 12V \/ 3A\u003c\/strong\u003e. It is suitable for most standard PC chassis fans and compact air-cooling setups within that power range.\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\": \"Is this PWM fan speed controller compatible with 2-wire or 3-wire fans?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this controller is designed exclusively for 4-wire PWM fans. Using it with 2-wire or 3-wire fans will not work correctly. 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It is suitable for most standard PC chassis fans and compact air-cooling setups within that power range.\"}}]}\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:\/\/80721r-dv.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/80721r-dv.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"PWM Fan Speed Controller DC 12V 3A – 4-Wire Digital Display\", \"item\": \"https:\/\/80721r-dv.myshopify.com\/products\/pwm-fan-speed-controller-dc-12v-3a-4-wire-digital-display\"}]}\u003c\/script\u003e","brand":"SPOT","offers":[{"title":"Set A","offer_id":67639851581690,"sku":"14:350686#Set A","price":33.87,"currency_code":"USD","in_stock":true},{"title":"Set B","offer_id":67639851614458,"sku":"14:350850#Set B","price":36.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0867\/1415\/5258\/files\/S1ebabec2641342c3828fd9c9092d4f84u.webp?v=1791160657","url":"https:\/\/spotmartusa.com\/products\/pwm-fan-speed-controller-dc-12v-3a-4-wire-digital-display","provider":"SPOT","version":"1.0","type":"link"}