1、Industrial‑grade quality, the motor speed controller can work at minus 20 °C to minus 40°C 2、the motor speed controller can be applied to various general‑purpose DC brushed motors for speed regulation. 3、The working voltage range is from DC10V to DC50V, the motor controlle can control different power at different voltage. 4、The control power is 0.01‑3000W, in which the maximum instantaneous starting current is 60A. 5、Used for production line conveyor belt speed control, pipeline exhaust fan speed control, treadmill speed control, multiple computer fan parallel speed control, electronic fan speed control. 6、Various types of automobile motor speed control (automobile cooling fan speed control, automobile fan speed control, automobile wiper motor speed control, automobile air conditioning fan speed control). 1 x Motor Speed Controller 1 x Switching Power4 x Screw Condition: 100% Brand NewItem Type: Motor Speed ControllerMaterial: PlasticColor: As Pictures Shown 1. Working Voltage: DC10V-DC50V wide working voltage range 2. Control Power: 0.01-3000W (the maximum instantaneous starting current is 60A, and the long-term working current should be controlled within 30A.)Different operating voltages correspond to different control power as follows:12V x 60A =720W when working voltage is 12V24V x 60A =1440W when working voltage is 24V36V x 60A =2160W when working voltage is 36V40V x 60A =2400W when working voltage is 40V50V x 60A =3000W when working voltage is 50V 3. Quiescent Current: 0.04A (when the working voltage is between DC10V and DC50V, the quiescent current will not exceed 40ma) 4. PWM Duty Cycle: 5%-100% 5. PWM Frequency: 15khz 6. Working Temperature: -20°C - 40°C (ambient temperature minus 20°C to minus 40°C) The speed governor is of industrial grade quality and can work stably in an environment below zero 7. Circuit Board Size(L x W x H): Approx. 122 x 87 x 32mm/ 4.8 x 3.4 x 1.3in (not including the adjustment part of the potentiometer) 8. Shell Size(L x W x H): Approx. 145  x 90 x 40mm/ 5.7 x 3.5 x 1.6inWiring Instructions:B+ B- connect the positive and negative poles of the power supplyM+ M- connect to the positive and negative poles of the motor