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Current Sensor Module WCM2720


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Hall Effect Base Linear Current Sensor


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Current Sensor Module WCM2720 Introduction

Current Sensor Module WCM2720 provides economical and precise solution for both AC and DC current sensing in industrial, commercial and communications systems. The WCM2720 consists of a current sensor, temperature sensor, a very high accuracy A/D converter and digital signal output of current. The WCM2720 includes a current path with 0.4mΩ 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.

The WCM2720 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 WCM2720 also offers solutions for true RMS current measurement of various loads.


  • Continuous output and Modbus RTU version.
  • Operating voltage DC5.0V.
  • 0.4 mΩ internal conductor resistance.
  • Sensing current range :
    AC : 0~ 20 A 50Hz, 60Hz)
    DC : 0~25 A
  • High accuracy :
    AC : (0~6 A) ± 60 mA
    (6~20 A) ± 1%
    DC : ±(0~6 A) ± 60 mA
    ±(6~25 A) ± 1%
  • High resolution :
    AC / DC : 18 mA.
  • UART, Baud Ra t e : 9600 bps , Parity bit : None Data bit : 8 Stop bit : 1.
  • Temperature calibration.
  • Isolation Voltage 1 KV.
SKU: Module WCM2720 Categories: ,
Symbol Parameter Test Condition Min. Type Max. Unit
VDD Operation Voltage 4.9 5 5.1 V
IDD Operation Current 6 8 mA
Rprimary Conductor Resistance IP = 10 A 0.5
TOP Operating Temperature -20 70 0C


Symbol Parameter Test Condition Min. Type Max. Unit
IOP AC Current Range 0 20 A
ETOT AC Current Total Output Error IOP=0~6A, TOP=250C ±60 mA
IOP= 6~20 A , TOP= 25˚C ±1 %
IOP=0~ 20 A
TOP= -20˚C to 70 ˚C
±5 %


Symbol Parameter Test Condition Min. Type Max. Unit
IOP DC Current Range 0  ±25 A
ETOT DC Current Total Output Error IOP=±(0~6A), TOP=250C ±60 mA
IOP= ±(6~20 A) , TOP= 25˚C ±1 %
IOP=0~ ±25 A
TOP= -20˚C to 70 ˚C
±5 %



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