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. 138-3467
Mfr. Part No.HO 40-NP-0100
BrandLEM
£9.84
Each
Units
Open Loop -100 → 100A 19 → 25mA 4.5 → 5.5 V - - PCB Mount 350 kHz ±1.5 % 1.75mm -40°C HO +105°C 20.13mm
RS Stock No. 138-3460
Mfr. Part No.HO 10-P-0000
BrandLEM
£8.23
Each
Units
Open Loop -25 → 25A 19 → 25mA 4.5 → 5.5 V - - Panel Mount 250 kHz ±1.35 % 8 x 8mm -40°C HO +105°C 12mm
RS Stock No. 138-3473
Mfr. Part No.HO 120-NP-0100
BrandLEM
£9.84
Each
Units
Open Loop -300 → 300A 19 → 25mA 4.5 → 5.5 V - - PCB Mount 350 kHz ±1.25 % 1.75mm -40°C HO +105°C 20.13mm
RS Stock No. 136-5724
Mfr. Part No.TT20-V8EH2DRZ00000
£87.36
Each
Units
- 5A 4 → 20mA 60 → 300 V ac/dc - - DIN Rail - 0.2 % - 0°C - +45°C 106.5mm
RS Stock No. 138-3464
Mfr. Part No.HO 15-NSM/SP33-1000
BrandLEM
£7.46
Each
Units
Open Loop -37.5 → 37.5A Maximum of 25mA 3.14 → 3.46 V - - Panel Mount 250 kHz ±1 % 18mm -40°C HO +105°C 12mm
RS Stock No. 138-3457
Mfr. Part No.HO 6-P/SP33-1000
BrandLEM
£8.23
Each
Units
Open Loop -20 → 20A Maximum of 25mA 3.14 → 3.46 V - - Panel Mount 250 kHz ±1.35 % 8 x 8mm -40°C HO +105°C 12mm
RS Stock No. 177-4930
Mfr. Part No.ATO-125-B333-D16
BrandLEM
£50.01
Each
Units
- 125A - - Split Core - DIN Rail 1.5 kHz - 16mm -10°C ATO +55°C 33.2mm
RS Stock No. 136-2033
Mfr. Part No.TLI4970D050T5XUMA1
BrandInfineon
£6.98
Each
Units
- 20 - 3.1 → 3.5 V - Hall Effect Surface Mount 18 kHz 3.5 % - -40°C TLI4970 +85°C 1mm
RS Stock No. 136-2046
Mfr. Part No.TLV493DA1B6HTSA2
BrandInfineon
£0.872
Each (In a Pack of 10)
Units
- 3.7 mA - 2.8 → 3.5 V - Hall Effect Surface Mount - - - -40°C TLV493D +125°C 1mm
RS Stock No. 138-3472
Mfr. Part No.HO 100-S/SP30-0100
BrandLEM
£13.94
Each
Units
Open Loop -250 → 250A 19 → 25mA 4.5 → 5.5 V - - Panel Mount 100 kHz ±1 % 15 x 8mm -40°C HO +105°C 40.8mm
RS Stock No. 138-3456
Mfr. Part No.HO 6-P-0000
BrandLEM
£8.23
Each
Units
Open Loop -20 → 20A 19 → 25mA 4.5 → 5.5 V - - Panel Mount 250 kHz ±1.35 % 8 x 8mm -40°C HO +105°C 12mm
RS Stock No. 138-3471
Mfr. Part No.HO 100-P-0100
BrandLEM
£12.73
Each
Units
Open Loop -250 → 250A 19 → 25mA 4.5 → 5.5 V - - Panel Mount 100 kHz ±1 % 15 x 8mm -40°C HO +105°C 18mm
RS Stock No. 138-3470
Mfr. Part No.HO 60-P-0100
BrandLEM
£12.73
Each
Units
Open Loop -150 → 150A 19 → 25mA 4.5 → 5.5 V - - Panel Mount 100 kHz ±1.25 % 15 x 8mm -40°C HO +105°C 18mm
RS Stock No. 138-3469
Mfr. Part No.HO 60-NP-0100
BrandLEM
£9.84
Each
Units
Open Loop -150 → 150A 19 → 25mA 4.5 → 5.5 V - - PCB Mount 350 kHz ±1.4 % 1.75mm -40°C HO +105°C 20.13mm
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