Current Transducers

Current transducers, or current sensors, are an electrical component that detects electric current in a wire and converts it into another type of electrical signal proportional to the current value. The generated signal could be analogue voltage, current or a digital output. This generated signal can be then used to display the measured current in an analogue ammeter, a digital ammeter, or can be used for the purpose of controlling other circuits.

Current Transducer Types
Current sensors can be either open-loop or closed-loop.

  • Open-Loop Sensor: This type measures AC and DC currents and provides electrical isolation between the circuit being measured and the output of the sensor. Open-loop current sensors are generally preferred in battery-powered circuits.
  • Closed-Loop Sensor: The Closed-Loop sensor is sometimes called a ’Zero-Flux’ sensor because it features a Hall-Effect sensor that feeds back an opposing current into a secondary coil, wound on the magnetic core to zero the flux produced in the magnetic core by the primary current. Closed-loop sensors are often used when high accuracy is essential.

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Description Price Sensor Technology Nominal Current Output Current Range Supply Voltage Transformer Type Sensor Type Mounting Type Frequency Bandwidth Accuracy Bore Size Minimum Operating Temperature Series Maximum Operating Temperature Depth
RS Stock No. 497-198
Mfr. Part No.HASS 100-S
BrandLEM
£15.57
Each
Units
Open Loop ±300A - 5 V - Hall Effect Panel Mount DC to 50 kHz ±1 % 20.4 x 10.4mm -40°C HASS +85°C 30mm
RS Stock No. 499-5564
Mfr. Part No.AP 50 B420L
BrandLEM
£100.22
Each
Units
- 50A 4 → 20mA 12 → 24 V dc - - DIN Rail 30 → 2000 Hz ±1 % 18mm -20°C AP +60°C 55mm
RS Stock No. 477-4711
Mfr. Part No.CSNS300M
BrandHoneywell
£87.75
Each
Units
Closed Loop 0 → 600A 150mA 15 V - Hall Effect Busbar, PCB Mount DC to 150 kHz ±0.5 % 26mm -40°C CSN +85°C 19mm
RS Stock No. 451-1324
Mfr. Part No.LA 100P/SP13
BrandLEM
£23.80
Each
Units
Closed Loop 0 → 160A 100mArms 12 → 15 V - Hall Effect PCB Mount DC to 200 kHz ±0.7 % 12.7 x 7mm -25°C LA +70°C 14.45mm
RS Stock No. 650-560
Mfr. Part No.CSLA1CF
BrandHoneywell
£24.93
Each
Units
Open Loop 0 → 100A - 8 → 16 V dc - Hall Effect PCB Mount - - 10.9mm -25°C CSL +85°C 10.4mm
RS Stock No. 497-401
Mfr. Part No.LAX 100-NP
BrandLEM
£18.46
Each
Units
Closed Loop 0 → 160A 50mA 11.4 → 15.75 V - Hall Effect PCB Mount >300 kHz ±0.91 % - -40°C LAX +85°C 16.35mm
RS Stock No. 169-7652
Mfr. Part No.CSLA1CF
BrandHoneywell
£18.40
Each (In a Box of 50)
Units
Open Loop 0 → 100A - 8 → 16 V dc - Hall Effect PCB Mount - - 10.9mm -25°C CSL +85°C 10.4mm
RS Stock No. 451-1396
Mfr. Part No.LF 1005S
BrandLEM
£148.17
Each
Units
Closed Loop 0 → 1500A 200mArms 15 → 24 V - Hall Effect Panel Mount DC to 150 kHz ±0.4 % 40.5mm -40°C LF +85°C 34.3mm
RS Stock No. 532-9261
Mfr. Part No.HTFS 800-P/SP2
BrandLEM
£16.32
Each
Units
Open Loop ±1200A - 5 V - Hall Effect PCB Mount DC to 50 kHz ±1 % 22mm -40°C HTFS +105°C 17mm
RS Stock No. 527-8523
Mfr. Part No.DHR 100 C10
BrandLEM
£164.91
Each
Units
Open Loop 600A - 20 → 50 V dc - Hall Effect Panel Mount DC 20 to 6000 Hz ±1 % 32mm -40°C DHR +70°C 25mm
RS Stock No. 914-5313
Mfr. Part No.CT132TRAN20A-5/10V
BrandHOBUT
£28.28
Each
Units
- 20A - 15 → 30 V - Loop Sensor DIN Rail 45 → 65 Hz Class 0.5 % 21mm -15°C CT132TRAN +50°C 30mm
RS Stock No. 793-4629
Mfr. Part No.CTSR 0.3-P
BrandLEM
£25.89
Each
Units
- 16 → 21.6 300mA 4.75 → 5.25 V - Fluxgate PCB Mount 3.5 kHz 1.9 % 20.3mm -40°C CTSR +105°C 17.9mm
RS Stock No. 337-2746
Mfr. Part No.2814728
£195.05
Each
Units
- 0 → 55A 0 → 20mA 20 → 30 V dc - - Chassis Mount 15 → 400 Hz <0.5 % - -20°C MCR-S10-50-UI-DCI-NC +60°C 114.5mm
RS Stock No. 497-091
Mfr. Part No.HTR 50-SB
BrandLEM
£101.40
Each
Units
Open Loop ±100A - 12 → 15 V - Hall Effect Busbar, Panel Mount DC to 10 kHz ±2 % 21mm -10°C HTR +70°C 21.5mm
RS Stock No. 497-378
Mfr. Part No.AT 50 B10
BrandLEM
£58.46
Each
Units
- 50A - - - - Cable Tie 50/60 Hz ±1.5 % 16mm -20°C AT +60°C 36.5mm
RS Stock No. 321-6286
Mfr. Part No.LAH25-NP
BrandLEM
£16.74
Each
Units
Closed Loop 25A 25mArms 12 → 15 V - Hall Effect PCB Mount DC to 200 kHz ±0.3 % - -25°C LAH +85°C 14.93mm
RS Stock No. 477-4749
Mfr. Part No.CSNS300F
BrandHoneywell
£87.43
Each
Units
Closed Loop 0 → 600A 150mA 15 V - Hall Effect Busbar, PCB Mount DC to 150 kHz ±0.5 % 26mm -40°C CSN +85°C 17.9mm
RS Stock No. 666-8172
Mfr. Part No.CAS 6-NP
BrandLEM
£10.31
Each
Units
Closed Loop 6A - 5.25 V - - PCB Mount 200 → 300 kHz ±0.8 % - -40°C CAS +85°C 13.4mm
RS Stock No. 181-2135
Mfr. Part No.CSLA2DG
BrandHoneywell
£25.98
Each
Units
Open Loop 0 → 150A - 6 → 12 V dc - Hall Effect PCB Mount - - 15.7mm -25°C CSL +85°C 14.2mm
RS Stock No. 451-1352
Mfr. Part No.LF 205S
BrandLEM
£42.31
Each
Units
Closed Loop 0 → 420A 100mArms 12 → 15 V - Hall Effect Panel Mount DC to 100 kHz ±0.5 % 15.6mm -40°C LF +85°C 26.19mm
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