LF Series - CURRENT SENSORS
The LF Series current sensors are designed for high‑precision measurement of DC, AC, and pulsed currents in demanding industrial and railway applications.
They provide reinforced galvanic isolation between the primary and secondary circuits and rely on closed‑loop Hall‑effect technology, ensuring excellent accuracy, fast response times, and high reliability.
Covering multiple models with various aperture sizes and mounting options, including panel‑mount configurations across the entire range and PCB‑mount variants for selected models, the LF Series offers flexible integration into a wide range of system architectures.
Its compact electronic design and performance characteristics make it a robust choice for environments where precise, isolated current measurement is essential.
LF Series – Features and benefits
Main characteristics
- Closed‑loop (compensated) Hall‑effect current transducers
- Bipolar and fully isolated current measurement
- Galvanic isolation through reinforced plastic case (UL 94‑V0 recognized)
- Current output (standard across the range)
- Panel‑mount installation across all models, with PCB‑mount options on selected versions
- Multiple aperture sizes to fit a wide variety of primary conductor configurations
Benefits
- High accuracy thanks to closed‑loop Hall technology
- Very good linearity and low offset / temperature drift
- Fast response time (typically <0.5 µs on newer models)
- Wide frequency bandwidth
- High immunity to external magnetic interference
- No insertion losses
- Current overload capability for enhanced system robustness
- Compact form factor, including ultra‑flat versions for constrained installations
Typical applications
Industrial applications
Suitable for a wide range of power‑electronics and automation systems:
- AC variable speed drives and servo motor drives
- Static converters for DC motor drives
- Battery supplied systems
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SPMS / SPMS)
- Power supplies for welding
- Windmill inverters
- Test & measurement equipment
Railway applications
Used both trackside and onboard traction systems:
- Single or three phase inverters
- Propulsion and braking choppers
- Propulsion converters
- Auxiliary converters
- Battery chargers
LEM LF – Download & Technical Characteristic
| Product | Check stock | Document | Primary nominal RMS current | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|---|
| LF 205-S/SP3 | Datasheet 3D | 100 A | 12 to 15 | -40 to 85 °C | |
| LF 205-S/SP5 | Datasheet 3D | 100 A | 12 to 15 | -40 to 85 °C | |
| LF 210-S/SP3 | Datasheet 3D | 100 A | 12 to 15 | -40 to 85 °C | |
| LF 210-S/SP5 | Datasheet 3D | 100 A | 12 to 15 | -40 to 85 °C | |
| LF 310-S/SPA4 | Datasheet 3D | 100 A | 15 to 20 | -40 to 85 °C | |
| LF 205-S | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 205-S/SP1 | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 205-P/SP3 | Datasheet 3D | 200 A | 15 to 15 | -40 to 85 °C | |
| LF 205-P | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 205-P/SP1 | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 210-S | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 210-S/SP1 | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 210-S/SP11 | Datasheet 3D | 200 A | 12 to 15 | -40 to 85 °C | |
| LF 305-S/SP7 | Datasheet | 250 A | 15 to 15 | -40 to 85 °C | |
| LF 306-S/SP1 |
| Datasheet | 250 A | 15 to 15 | -40 to 85 °C |
| LF 310-S/SP11 | Datasheet 3D | 250 A | 15 to 15 | -10 to 70 °C | |
| LF 310-S/SP14 | Datasheet 3D | 250 A | 15 to 18 | -40 to 70 °C | |
| LF 305-S | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 305-S/SP10 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 305-S/SP16 | Datasheet 3D | 300 A | 24 to 24 | -10 to 70 °C | |
| LF 306-S | Datasheet 3D | 300 A | 12 to 15 | -25 to 70 °C | |
| LF 306-S/SP7 | Datasheet 3D | 300 A | 15 to 15 | -40 to 85 °C | |
| LF 306-S/SP10 |
| Datasheet | 300 A | 12 to 15 | -25 to 70 °C |
| LF 310-S | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 310-S/SP10 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 310-S/SP15 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 310-S/SP16 | Datasheet 3D | 300 A | 24 to 24 | -10 to 70 °C | |
| LF 310-S/SP20 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 310-S/SP6 | Datasheet 3D | 300 A | 24 to 24 | -10 to 70 °C | |
| LF 310-S/SPA0 | Datasheet 3D | 300 A | 18 to 18 | -40 to 85 °C | |
| LF 310-S/SPA1 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 310-S/SPA2 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 310-S/SPA5 | Datasheet 3D | 300 A | 12 to 20 | -40 to 85 °C | |
| LF 505-S | Datasheet 3D | 500 A | 15 to 24 | -40 to 70 °C | |
| LF 505-S/SP15 | Datasheet 3D | 500 A | 15 to 24 | -10 to 70 °C | |
| LF 505-S/SP22 | Datasheet 3D | 500 A | 15 to 24 | -40 to 70 °C | |
| LF 505-S/SP23 | Datasheet 3D | 500 A | 24 to 24 | -40 to 85 °C | |
| LF 505-S/SP25 | Datasheet 3D | 500 A | 24 to 24 | -40 to 85 °C | |
| LF 505-S/SP39 | Datasheet 3D | 500 A | 15 to 24 | -10 to 70 °C | |
| LF 505-S/SP40 | Datasheet 3D | 500 A | 15 to 24 | -40 to 70 °C | |
| LF 1005-S/SP11 | Datasheet 3D | 500 A | 15 to 15 | -10 to 85 °C | |
| LF 510-S | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SP13 | Datasheet 3D | 500 A | 24 to 24 | -10 to 70 °C | |
| LF 510-S/SP15 | Datasheet 3D | 500 A | 15 to 24 | -10 to 70 °C | |
| LF 510-S/SP22 | Datasheet 3D | 500 A | 15 to 24 | -40 to 70 °C | |
| LF 510-S/SP23 | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SPA1 | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SPA2 | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SPA3 | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SPA4 | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SPA5 | Datasheet 3D | 500 A | 15 to 24 | -40 to 85 °C | |
| LF 510-S/SP5 | Datasheet 3D | 500 A | 15 to 15 | -40 to 85 °C | |
| LF 1005-S/SP12 | Datasheet 3D | 600 A | 24 to 24 | -40 to 85 °C | |
| LF 510-S/SP35 | Datasheet 3D | 600 A | 18 to 18 | -40 to 85 °C | |
| LF 510-S/SP26 | Datasheet 3D | 622 A | 24 to 24 | -10 to 70 °C | |
| LF 510-S/SP34 | Datasheet 3D | 650 A | 15 to 15 | -40 to 85 °C | |
| LF 1005-S | Datasheet 3D | 1000 A | 24 to 24 | -40 to 85 °C | |
| LF 1005-S/SP14 | Datasheet 3D | 1000 A | 24 to 24 | -40 to 85 °C | |
| LF 1005-S/SP22 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1005-S/SP32 | Datasheet 3D | 1000 A | 15 to 15 | -10 to 70 °C | |
| LF 1005-S/SP33 | Datasheet 3D | 1000 A | 24 to 24 | -40 to 85 °C | |
| LF 1005-S/SP35 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SP16 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 2005-S/SP9 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SP22 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SP33 | Datasheet 3D | 1000 A | 24 to 24 | -40 to 85 °C | |
| LF 1010-S/SP41 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SPA1 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SPA2 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SPA3 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SPA4 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SPA5 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LF 1010-S/SPA6 | Datasheet 3D | 1188 A | 24 to 24 | -40 to 70 °C | |
| LF 1010-S/SP25 | Datasheet 3D | 1188 A | 24 to 24 | -10 to 70 °C | |
| LF 2005-S | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2005-S/SP1 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2005-S/SP10 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 70°C | |
| LF 2005-S/SP3 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 70°C | |
| LF 2005-S/SP8 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2005-S/SP11 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2005-S/SP13 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 80 °C | |
| LF 2005-S/SP23 | Datasheet 3D | 2000 A | 15 to 24 | -25 to 70 °C | |
| LF 2005-S/SP26 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2010-S | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2010-S/SP1 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2010-S/SP6 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2010-S/SP23 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2010-S/SP33 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 85 °C | |
| LF 2010-S/SPA1 | Datasheet 3D | 2300 A | 15 to 24 | -40 to 85 °C |
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