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Current Sensor Module WCM2801


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Hall Effect Base Linear Current Sensor


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Current Sensor Module WCM2801 Introduction

Current Sensor Module WCM2801 provides economical and precise solution for both AC and DC current sensing in industrial, commercial and communications systems. The WCM2801 consists of a current sensor, temperature sensor, a very high accuracy A/D converter and digital signal output of current. The WCM2801 includes a current path with 98 mΩ typical internal conductor resistance. This extremely low resistance can effectively reduce power loss, operating temperature and increase the reliability greatly, user’s MCU can get the real data from DATA pin.

WCM2801 provides temperature calibration of the internal current sensor and accurately measures the current of AC 50 / 60Hz and DC at temperature from -20˚C~70˚C. The WCM2801 also offers solutions for true RMS current measurement of various loads.


  • Continuous output and Modbus-RTU version.
  • Operating voltage DC5.0V.
  • 98 mΩ internal conductor resistance.
  • Sensing current range :
    AC : 0~0.5A (50Hz, 60Hz)
    DC : 0~±0.7A
  • High accuracy :
    AC : (0~0.2A) ± 2mA
    (0.2~0.5A) ± 1%
    DC : ±(0~0.2A) ± 2mA
    ±(0.2~0.7A) ± 1%
  • High resolution :
    AC / DC : 0.6mA
  • UART, Baud Rate : 9600 bps, Parity bit : None, Data bit : 8, Stop bit : 1
  • Temperature calibration
  • Isolation Voltage 1KV
SKU: Module WCM2801 Categories: ,
Symbol Parameters Test Conditions Min. Typ. Max. Unit
VDD Operation Voltage 4.9 5 5.1 V
IDD Operation Current 6 8 mA
Rprimary Conductor Resistance IP= 2A 98
TOP Operating Temperature -20 70 0C




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