Product Category


B2 Type Current Sensor


B2 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.

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 B2-25A Unit
Rated current(Ipn) 25 A
Measure range(Ip) ±50 A
Measure resister range 100~460 Ω
Rated output (Isn) ±25 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~100 KHZ
Secondary coil resister@70℃ 50 Ω
Turns Rated current IPN(A) Measure range Ip(A) Rated output Isn(mA) Turns ratio Primary resister (mΩ) Primary inductance (uH) Pins connections
1 25(35) 50(70) 25(35) 1/1000 0.3 0.023 B2 Type Current Sensor-heyi
2 12(17.5) 24(35) 25(35) 2/1000 1.1 0.09 B2 Type Current Sensor-heyi
3 8(12) 16(24) 25(36) 3/1000 2.5 0.21 B2 Type Current Sensor-heyi
4 6(9) 12(18) 25(36) 4/1000 4.4 0.37 B2 Type Current Sensor-heyi
5 5(7) 10(14) 25(35) 5/1000 6.3 0.58 B2 Type Current Sensor-heyi
Mechanical dimension(for reference only) Note
B2 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) 22 g
Pulse current signal response characteristic Effects of impulse noise
B2 Type Current Sensor-heyi ( Input signal )

( Output signal )

B2 Type Current Sensor-heyi ( Output voltage )

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