Product Category


B4X Type Current Sensor


B4X series current sensor is a closed loop device based on the principle of the hall effect, 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 B4X-200A B4X-300A B4X-400A B4X-500A Unit
Rated current(Ipn) ±200 ±300 ±400 ±500 A
Measure range(Ip) 0—±300 0—±450 0—±600 0—±750 A
Turns ratio(Np/Ns) 1:2000 1:3000 1:4000 1:5000 T
Measure resister
@±200Amax @±300Amax @±400Amax @±500Amax Ω
0(min)88(max) 0(min)76(max) 0(min)63(max) 0(min)46(max)
@±300Amax @±450Amax @±600Amax @±750Amax Ω
0(min)50(max) 0(min)38(max) 0(min)25(max) 0(min)8 (max)
Measure resister
@±200Amax @±300Amax @±400Amax @±500Amax Ω
0(min)117(max) 0(min)105(max) 0(min)92(max) 0(min)75(max)
@±300Amax @±450Amax @±600Amax @±750Amax Ω
0(min)69(max) 0(min)57(max) 0(min)44(max) 0(min)27(max)
Coil resister 19 31 44 61 Ω
Rated output @Ip=±Ipn                 ±100±1% mA
Supply voltage ±12,±15,±18 V
Power Consumption ≤20+IpX(Np/Ns) mA
Offset current @Ip=0    ±0.2 mA
Offset drift @ -40~+85℃     ≤±0.5 mA
Linearity @Ip=0-±Ipn    ≤0.1 %FS
Response time @50A/μS, 10%-90%      ≤1 μS
Galvanic isolation @ 50HZ,AC,1min      6 KV
di/dt >100 A/us
Bandwidth @ -1dB       0~150 KHZ
Mechanical dimension(for reference only) Note
B4X Type Current Sensor-heyi 1. All dimensions are in mm.

2. General tolerance ±1mm.

3. Elucidation:  1:+15V  2:–15V  3:I0UT  4:NC

General date Value Unit
Operating temperature(TA) -40 to +85
Storage temperature(TS) -40 to +125
Mass(approx) (M) 162 g
Pulse current signal response characteristic Effects of impulse noise
B4X Type Current Sensor-heyi ( Input signal )

( Output signal )

B4X Type Current Sensor-heyi ( Output voltage )

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