{"product_id":"pwm-dc-motor-speed-controller-12v-24v-36v-40a-adjustable","title":"PWM DC Motor Speed Controller 12V\/24V\/36V 40A Adjustable","description":"\n\u003ch2\u003ePWM DC Motor Speed Controller — 12V \/ 24V \/ 36V, 40A Peak\u003c\/h2\u003e\n\u003cp\u003eTake precise control of your brushed DC motors with this compact, high-performance PWM Motor Speed Controller. Designed for a wide range of DC voltages (12V, 24V, and 36V) and capable of handling up to 40A peak current, this controller is an essential component for DIY builds, industrial equipment, robotics, and power tool applications. The built-in tachometer display lets you monitor speed at a glance, while the overload and stall protection circuitry keeps your motor — and your project — safe.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Works with 12V, 24V, and 36V DC input — simply match the controller input voltage to your motor's rated voltage for optimal performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Current Capacity:\u003c\/strong\u003e Supports a continuous operating current of up to 30A and a peak current of 40A, making it suitable for demanding motor-drive applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull 0–100% Speed Range:\u003c\/strong\u003e A smooth, fully adjustable speed range via the precision 7mm control knob allows fine-tuned RPM management at a PWM frequency of 25 kHz for quiet, efficient operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLinear Output Voltage:\u003c\/strong\u003e Output voltage remains stable under load, ensuring consistent motor performance without unexpected speed fluctuations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverload \u0026amp; Stall Protection:\u003c\/strong\u003e Built-in overcurrent and stall protection circuitry automatically safeguards your motor and controller from damage during overload events.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTachometer Display:\u003c\/strong\u003e Integrated percentage display provides real-time speed readout so you always know exactly where your motor is running.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Metal Construction:\u003c\/strong\u003e Measures just 85 × 58 × 38 mm (approx. 3.35 × 2.28 × 1.5 in.) and is built from durable alloy steel — easy to mount in tight spaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Direction Reversal:\u003c\/strong\u003e This controller does not support forward\/reverse switching; it is designed for unidirectional brushed DC motor speed control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e12V \/ 24V \/ 36V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eContinuous Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e30A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePeak Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePWM Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e25 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSpeed Adjustment Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e0 – 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMotor Type Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eBrushed DC Motors\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eAlloy Steel (Metal)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e85 × 58 × 38 mm \/ 3.35 × 2.28 × 1.5 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #ddd;\"\u003eMade in 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 DC Motor Speed Controller\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cp\u003eAlways ensure that the input voltage of the controller matches your motor's rated voltage before connecting. The input current of your power supply must exceed the motor's working current. Due to manual measurement methods, please allow a tolerance of ±1–2 cm. Actual product color may vary slightly from images due to differences in monitor settings and lighting.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on electrical safety when working with DC power systems and motor controllers, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What types of motors are compatible with this PWM DC motor speed controller?\u003c\/h4\u003e\n\u003cp\u003eA: This PWM DC motor speed controller is designed specifically for \u003cstrong\u003ebrushed DC motors\u003c\/strong\u003e. It is not compatible with brushless motors, stepper motors, or AC motors. Always verify your motor's rated voltage (12V, 24V, or 36V) and current draw before connecting.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this speed controller run motors in both forward and reverse directions?\u003c\/h4\u003e\n\u003cp\u003eA: No — this controller supports \u003cstrong\u003eunidirectional operation only\u003c\/strong\u003e. It does not include a forward\/reverse switching function. If bidirectional control is required, you would need an H-bridge motor driver or a controller with directional support.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the overload and stall protection do?\u003c\/h4\u003e\n\u003cp\u003eA: The built-in \u003cstrong\u003eoverload and stall protection\u003c\/strong\u003e monitors the current drawn by the motor. If the current exceeds safe operating limits — for example, if the motor becomes mechanically jammed — the controller automatically intervenes to prevent damage to both the motor and the controller's internal components.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is a heatsink required for continuous high-current operation?\u003c\/h4\u003e\n\u003cp\u003eA: The controller is rated for a continuous current of 30A. For sustained high-load operation near that limit, ensuring adequate ventilation around the unit is recommended. Adding an external heatsink or small cooling fan can help maintain stable temperatures during prolonged use.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What types of motors are compatible with this PWM DC motor speed controller?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This PWM DC motor speed controller is designed specifically for brushed DC motors. It is not compatible with brushless motors, stepper motors, or AC motors. Always verify your motor's rated voltage (12V, 24V, or 36V) and current draw before connecting.\"}}, {\"@type\": \"Question\", \"name\": \"Can this speed controller run motors in both forward and reverse directions?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this controller supports unidirectional operation only. It does not include a forward\/reverse switching function. 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