{"product_id":"2-channel-pwm-fan-speed-controller-led-digital-thermostat-dc-12v-24v","title":"2-Channel PWM Fan Speed Controller – LED Digital Thermostat 12V\/24V","description":"\n\u003ch2\u003e2-Channel PWM Fan Motor Speed Controller with LED Digital Thermostat\u003c\/h2\u003e\n\u003cp\u003eTake full command of your cooling setup with this \u003cstrong\u003e4-wire, 2-channel PWM Fan Temperature Controller\u003c\/strong\u003e. Featuring a bright LED digital display and dual independent temperature control channels, this compact board lets you automatically regulate fan speed based on real-time temperature readings — keeping your DC 12V or 24V fans running at exactly the right speed for optimal thermal management.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Voltage:\u003c\/strong\u003e DC 8–60V input range for broad compatibility across 12V and 24V systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Independent Channels:\u003c\/strong\u003e Two separate temperature-controlled fan outputs, each with its own NTC thermistor probe (10K, B=3950)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePWM Speed Control:\u003c\/strong\u003e 10%–100% output range for smooth, stepless fan speed adjustment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Digital Display:\u003c\/strong\u003e Alternating readout of both channel temperatures at a glance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Accuracy:\u003c\/strong\u003e Measures –9.9°C to 99.9°C; acceleration range 5–94°C, full-speed range 10–99°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeed Monitoring:\u003c\/strong\u003e Displays fan RPM from 10–9,990 RPM (resolution: 10 RPM) for real-time feedback\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStop Alarm Output:\u003c\/strong\u003e Optional external AC buzzer jack triggers when fan speed drops below 375 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Key Programming:\u003c\/strong\u003e Set low-speed threshold and temperature control zone via onboard buttons; settings are saved after power off\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact PCB:\u003c\/strong\u003e 65 × 65 × 15 mm board with 56 × 56 mm mounting hole pattern (3.2 mm diameter)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt with Plastic + Metal construction\u003c\/strong\u003e for durability\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; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eDC 8–60V (must match fan voltage)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e35 mA @ 12V \/ 22 mA @ 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMax Board Fan Pin Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e3A per channel (use direct wiring for higher-current fans)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePWM Output Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e10%–100%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eTemperature Probe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eNTC 10K, B = 3950\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eTemp Measurement Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e–9.9°C to 99.9°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSpeed Measurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e10–9,990 RPM (resolution: 10 RPM)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eStop Alarm Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u0026lt; 375 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eBoard Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e65 × 65 × 15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWiring Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlue screw terminal:\u003c\/strong\u003e Connect to main power supply (voltage must match fan voltage, within 8–60V range)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannel 1 \u0026amp; Channel 2:\u003c\/strong\u003e 4-wire connection — (–) power, (+) power, speed feedback, PWM control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal 1 \u0026amp; Thermal 2:\u003c\/strong\u003e Connect NTC thermistors (10K, B=3950) for independent channel temperature sensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBeep jack:\u003c\/strong\u003e Connect an external AC buzzer for stop alarm notification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e⚠️ Important: Always match power supply voltage to your fan's rated voltage. Applying 24V to a 12V fan will damage it.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × PWM Fan Temperature Controller Board (complete set)\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\/1-5m-nylon-braided-3-5mm-aux-audio-cable-car-phone-headphone\"\u003e1.5M Nylon Braided 3.5mm AUX Audio Cable | Car, Phone \u0026amp; Speaker\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/adhesive-metal-plates-magnets-self-stick-steel-strips-10-pack\"\u003e10-Pack Adhesive Metal Plates for Magnets – Self-Stick Steel Strips\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-tool\"\u003e1\/4\" Hex Shank Wire Twister Drill Attachment | Rebar Tie Tool\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 with low-voltage DC electronics, visit the U.S. Consumer Product Safety Commission (CPSC). For standards on electrical and electronic components, see \u003ca href=\"https:\/\/www.nist.gov\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST – National Institute of Standards and Technology\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What fan types are compatible with this PWM fan speed controller?\u003c\/h4\u003e\n\u003cp\u003eA: This controller is designed for standard 4-wire PWM fans operating at DC 12V or 24V. It is compatible with the vast majority of PC and system fans that use a 2-pole speed signal. Always ensure your power supply voltage matches your fan's rated voltage — the board itself supports DC 8–60V input.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I control fans with a current higher than 3A per channel?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — for fans that draw more than 3A, you should connect the fan's power wires directly to the main power supply rather than through the board's fan interface pins. The board still provides PWM control and speed signal lines; only the high-current power wiring is bypassed to protect the board.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I set the temperature thresholds for each channel?\u003c\/h4\u003e\n\u003cp\u003eA: Use the onboard keys to set both the low-speed threshold and the temperature control zone for each of the two independent channels. Acceleration temperature can be set from 5°C to 94°C, and full-speed temperature from 10°C to 99°C. All settings are saved in memory after programming, so they persist through power cycles.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this controller work with 3-wire fans?\u003c\/h4\u003e\n\u003cp\u003eA: This controller is specifically designed for 4-wire PWM fans. While 3-wire fans can sometimes be connected, PWM speed control may not function correctly as 3-wire fans use voltage-based speed control rather than a PWM signal. For best results, use a 4-wire PWM-compatible fan.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What fan types are compatible with this PWM fan speed controller?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This controller is designed for standard 4-wire PWM fans operating at DC 12V or 24V. It is compatible with the vast majority of PC and system fans that use a 2-pole speed signal. Always ensure your power supply voltage matches your fan's rated voltage — the board itself supports DC 8–60V input.\"}}, {\"@type\": \"Question\", \"name\": \"Can I control fans with a current higher than 3A per channel?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — for fans that draw more than 3A, you should connect the fan's power wires directly to the main power supply rather than through the board's fan interface pins. The board still provides PWM control and speed signal lines; only the high-current power wiring is bypassed to protect the board.\"}}, {\"@type\": \"Question\", \"name\": \"How do I set the temperature thresholds for each channel?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use the onboard keys to set both the low-speed threshold and the temperature control zone for each of the two independent channels. Acceleration temperature can be set from 5°C to 94°C, and full-speed temperature from 10°C to 99°C. All settings are saved in memory after programming, so they persist through power cycles.\"}}, {\"@type\": \"Question\", \"name\": \"Does this controller work with 3-wire fans?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This controller is specifically designed for 4-wire PWM fans. While 3-wire fans can sometimes be connected, PWM speed control may not function correctly as 3-wire fans use voltage-based speed control rather than a PWM signal. For best results, use a 4-wire PWM-compatible fan.\"}}]}\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\": \"2-Channel PWM Fan Speed Controller – LED Digital Thermostat 12V\/24V\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/products\/2-channel-pwm-fan-speed-controller-led-digital-thermostat-dc-12v-24v\"}]}\u003c\/script\u003e","brand":"Zpaxo","offers":[{"title":"Default Title","offer_id":54190200619318,"sku":"\u003cnone\u003e","price":21.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7774\/3158\/files\/S10f64abcf9d04e4d9859665c7fe4fbdbQ.webp?v=1783279484","url":"https:\/\/0i45ne-c8.myshopify.com\/products\/2-channel-pwm-fan-speed-controller-led-digital-thermostat-dc-12v-24v","provider":"Zpaxo","version":"1.0","type":"link"}