Product Category


B201 Type Current Sensor


B201 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. 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 B201-10A B201-20A B201-30A B201-40A Unit
Rated current(Ipn) 10 20 30 40 A
Measure range(Ip) 20 40 60 80 A
Turns ratio(Np/Ns) 1:1000 1:1000 1:1000 1:1600 T
Measure resister 1230±0.1% 594±0.1% 467±0.1% 420±0.1% Ω
Rated output 10 20 25 25 mA
Coil resister 43 43 43 90 Ω
Supply voltage ±12,±15 V
Power Consumption ≤20+ IpX(Np/Ns) mA
Offset current @Ip=0      ±0.15 mA
Offset drift @ -40~+85℃      ≤±0.5 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%    ≤500 ns
Galvanic isolation @ 50HZ,AC,1min     2.5 KV
Bandwidth @ -1db       DC~200 KHZ
Mechanical dimension(for reference only) Note
B201 Type Current Sensor-heyi 1. All dimensions are in mm.
2. General tolerance ±1mm.
3. Elucidation: 1:+5V 2:OV 3:V0UT
General date Value Unit
Operating temperature(TA) -40 to +85
Storage temperature(TS) -40 to +125
Mass(approx) (M) 10 g
Pulse current signal response characteristic Effects of impulse noise
B201 Type Current Sensor-heyi ( Input signal )

( Output signal )

B201 Type Current Sensor-heyi ( Output voltage )

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