Product Category


B203 Type Current Sensor


B203 series current sensor is a closed loop device based on the measuring principle of the hall effect and null balance method, with a galvanic isolation between primary and secondary circuit.

Directions for use:

  • When the current will be measured goes through a sensor, the current will be measured at the output end. (Note: The false wiring may result in the damage of the sensor)
  • Custom design in the different rated input current and the output current are available.


  • AC variable speed drives
  • Static converters for DC motor drives
  • Battery supplied applications.
  • Uninterruptible Power Supplies (UPS).
  • Switched Mode Power Supplies (SMPS).
  • Power supplies for welding applications.
Type B203-25A B203-50A B203-75A B203-100A Unit
Rated current(Ipn) 25 50 75 100 A
Measure range(Ip) 37.5 75 112.5 150 A
Turns ratio(Np/Ns) 1:1000 1:2000 1:2000 1:2000 T
Measure resister 0~495 0~470 0~290 0~205 Ω
Rated output 25 25 37.5 50 mA
Coil resister 35 60 60 60 Ω
Supply voltage ±12,±15 V
Power Consumption ≤20+ IpX(Np/Ns) mA
Offset current @Ip=0     ±0.02 mA
Offset drift @ -40~+85℃     ≤±0.005 mA
Linearity @Ip=0-±Ipn     ≤0.1 %FS
Total precision  ≤±0.7 %
di/dt accurately followed >50 A /μS
Response time @100A/μ S,10%-90%     ≤1 μS
Galvanic isolation @ 50HZ,AC,1min    2.5 KV
Bandwidth @ -1db    DC~100 KHZ
Mechanical dimension(for reference only) Note
B203 Type Current Sensor-heyi 1. All dimensions are in mm.
2. General tolerance ±1mm.
3. Elucidation: 1:+15V 2: -15V 3:I0UT
General date Value Unit
Operating temperature(TA) -40 to +85
Storage temperature(TS) -40 to +125
Mass(approx) (M) 25 g
Pulse current signal response characteristic Effects of impulse noise
B203 Type Current Sensor-heyi ( Input signal )

( Output signal )

B203 Type Current Sensor-heyi ( Output voltage )

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