Product Category


B1H Type Current Sensor


B1H series multi-range 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. It provides accurate electronic measurement of DC, AC or pulsed currents.

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 B1H-25A Unit
Rated current(Ipn) 25 A
Measure range(Ip) ±55 A
Measure resister range 100~420 Ω
Rated output (Isn) ±25 mA
Supply voltage ±12, ±15 V
Power Consumption ≤20+ IpX(Np/Ns) mA
Turns ratio(Np/Ns) 1-2-3:1000 T
Zero offset current @Ip=0               ≤±0.2 mA
Offset current drift @ -40~+85℃        ≤±0.005 mA
Response time @50A/μ S,10%-90%       <1 μS
Linearity @Ip=0-±Ipn          ≤0.1 %FS
Galvanic isolation @ 50HZ/60HZ,AC,1min       5 KV
di/dt accurately followed >50 A /μS
Bandwidth DC~200 KHZ
 @70℃ Secondary coil resister 35 Ω
Primary turns Rated current Rated Output Is(mA) Primary resister [mΩ] Primary inductor(uH) Pins connections
1 25 25 0.15 0.01 B1H Type Current Sensor-heyi
2 12 24 0.75 0.05 B1H Type Current Sensor-heyi
3 8 24 1.45 0.14 B1H Type Current Sensor-heyi
Mechanical dimension(for reference only) Remarks
B1H Type Current Sensor-heyi 1. All dimensions are in mm.
2. General tolerance ±1mm.
General date Value Unit
Operating temperature(TA) -40 to +85
Storage temperature(TS) -40 to +125
Mass(approx) (M) 15 g
Pulse current signal response characteristic Effects of impulse noise
B1H Type Current Sensor-heyi ( Input signal )

( Output signal )

B1H Type Current Sensor-heyi ( Output voltage )

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