Product Category


B1 Type Current Sensor


B1 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 B1-25A B1-50A Unit
Rated current(Ipn) 25 50 A
Measure range(Ip) ±50 ±100 A
Measure resister range 54~360 68~180 Ω
Rated output (Isn) ±25 ±50 mA
Supply voltage ±15V V
Power Consumption ≤20+ IpX(Np/Ns) mA
Turns ratio(Np/Ns) 1-2-3-4:1000 T
Zero offset current @Ip=0    ≤±0.15 mA
Offset current drift @ -40~+85℃    ≤±0.5 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
Secondary coil resister@70℃ 40 Ω
Primary turns Rated current Ipn(A) Primary resister [mΩ] Rated output Is (mA) Pins connections
1 25, 50 0.05 25, 50 B1 Type Current Sensor-heyi
2 12, 25 0.2 24, 50 B1 Type Current Sensor-heyi
3 8, 16 0.48 24, 48 B1 Type Current Sensor-heyi
4 6,12 1 24, 48 B1 Type Current Sensor-heyi
Mechanical dimension(for reference only) Note
B1 Type Current Sensor-heyi 1.Primary mounting dimensionsø1.4mm

2.Secondary mounting dimensionsø1.0mm

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
B1 Type Current Sensor-heyi ( Input signal )

( Output signal )

B1 Type Current Sensor-heyi ( Output voltage )

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