LR7843 MOSFET Switch Control Module, Optocoupler Isolation

CreateLabz StoreSKU: 30-021


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This MOSFET module with optoisolation uses the LR7843 N-Channel logic compatible MOSFET with ultra-low Rds(on) for moderate to higher current low-side switching applications of up to 15A continuous.


  • One switching output
  • Ultra-low 3.3mΩ Rds(on) resistance
  • 2.5V – 20V input control voltage with optoisolation
  • 6 – 28V output switching voltage
  • 15A continuous current handling capability (See notes below)
  • 3.3 and 5V logic compatible (See notes below)
  • Compatible with MCU and control board, 3V or 5V signal.
  • High-level start, low-level stop, PWM speed regulation.
  • It is widely used to control the start and stop of the motor, solenoid valve, and other mainstream equipment.
  • With optocoupler isolation, control signal, and controlled equipment power supply isolation, greatly improving anti-interference.
  • PC817 linear optocoupler is used to transmit continuously changing analog voltage or current signals.
  • MOS tube model: LR7843
  • Dimensions: 35 x 16 x 14mm(L x W x H)


  • LR7843 MOSFET Control Module
  • 3-pin Screw Terminal
  • 2-pin Screw Terminal
  • Small male header strip

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