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    • LF Series

    For DC, AC, pulse currents' measurements of 100 to 2300 ARMS nominal with galvanic isolation

    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

    LF Series current sensors

    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

    		DocumentNominal valueSupply Voltage rangeOp. Temperature
    LF 205-S/SP3Datasheet
    3D    		100 A12 to 15-40 to 85 °C
    LF 205-S/SP5Datasheet
    3D    		100 A12 to 15-40 to 85 °C
    LF 210-S/SP3Datasheet
    3D    		100 A12 to 15-40 to 85 °C
    LF 210-S/SP5Datasheet
    3D    		100 A12 to 15-40 to 85 °C
    LF 310-S/SPA4 Datasheet
    3D    		100 A15 to 20-40 to 85 °C
    LF 205-SDatasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 205-S/SP1Datasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 205-P/SP3 Datasheet
    3D    		200 A15 to 15-40 to 85 °C
    LF 205-PDatasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 205-P/SP1Datasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 210-SDatasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 210-S/SP1Datasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 210-S/SP11Datasheet
    3D    		200 A12 to 15-40 to 85 °C
    LF 305-S/SP7Datasheet250 A15 to 15-40 to 85 °C
    LF 306-S/SP1

     

    		Datasheet250 A15 to 15-40 to 85 °C
    LF 310-S/SP11 Datasheet
    3D    		250 A15 to 15-10 to 70 °C
    LF 310-S/SP14 Datasheet
    3D    		250 A15 to 18-40 to 70 °C
    LF 305-SDatasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 305-S/SP10Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 305-S/SP16Datasheet
    3D    		300 A24 to 24-10 to 70 °C
    LF 306-S

     

    		Datasheet
    3D    		300 A12 to 15-25 to 70 °C
    LF 306-S/SP7

     

    		Datasheet
    3D    		300 A15 to 15-40 to 85 °C
    LF 306-S/SP10

     

    		Datasheet300 A12 to 15-25 to 70 °C
    LF 310-SDatasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 310-S/SP10Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 310-S/SP15 Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 310-S/SP16Datasheet
    3D    		300 A24 to 24-10 to 70 °C
    LF 310-S/SP20Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 310-S/SP6 Datasheet
    3D    		300 A24 to 24-10 to 70 °C
    LF 310-S/SPA0 Datasheet
    3D    		300 A18 to 18-40 to 85 °C
    LF 310-S/SPA1 Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 310-S/SPA2 Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 310-S/SPA5Datasheet
    3D    		300 A12 to 20-40 to 85 °C
    LF 505-SDatasheet
    3D    		500 A15 to 24-40 to 70 °C
    LF 505-S/SP15Datasheet
    3D    		500 A15 to 24-10 to 70 °C
    LF 505-S/SP22Datasheet
    3D    		500 A15 to 24-40 to 70 °C
    LF 505-S/SP23Datasheet
    3D    		500 A24 to 24-40 to 85 °C
    LF 505-S/SP25 Datasheet
    3D    		500 A24 to 24-40 to 85 °C
    LF 505-S/SP39Datasheet
    3D    		500 A15 to 24-10 to 70 °C
    LF 505-S/SP40Datasheet
    3D    		500 A15 to 24-40 to 70 °C
    LF 1005-S/SP11 Datasheet
    3D    		500 A15 to 15-10 to 85 °C
    LF 510-SDatasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SP13Datasheet
    3D    		500 A24 to 24-10 to 70 °C
    LF 510-S/SP15Datasheet
    3D    		500 A15 to 24-10 to 70 °C
    LF 510-S/SP22Datasheet
    3D    		500 A15 to 24-40 to 70 °C
    LF 510-S/SP23Datasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SPA1Datasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SPA2Datasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SPA3 Datasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SPA4 Datasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SPA5 Datasheet
    3D    		500 A15 to 24-40 to 85 °C
    LF 510-S/SP5 Datasheet
    3D    		500 A15 to 15-40 to 85 °C
    LF 1005-S/SP12Datasheet
    3D    		600 A24 to 24-40 to 85 °C
    LF 510-S/SP35 Datasheet
    3D    		600 A18 to 18-40 to 85 °C
    LF 510-S/SP26 Datasheet
    3D    		622 A24 to 24-10 to 70 °C
    LF 510-S/SP34 Datasheet
    3D    		650 A15 to 15-40 to 85 °C
    LF 1005-SDatasheet
    3D    		1000 A24 to 24-40 to 85 °C
    LF 1005-S/SP14Datasheet
    3D    		1000 A24 to 24-40 to 85 °C
    LF 1005-S/SP22Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1005-S/SP32 Datasheet
    3D    		1000 A15 to 15-10 to 70 °C
    LF 1005-S/SP33Datasheet
    3D    		1000 A24 to 24-40 to 85 °C
    LF 1005-S/SP35 Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SP16 Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 2005-S/SP9Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-SDatasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SP22Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SP33Datasheet
    3D    		1000 A24 to 24-40 to 85 °C
    LF 1010-S/SP41Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SPA1 Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SPA2Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SPA3Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SPA4 Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SPA5Datasheet
    3D    		1000 A15 to 24-40 to 85 °C
    LF 1010-S/SPA6Datasheet
    3D    		1188 A24 to 24-40 to 70 °C
    LF 1010-S/SP25 Datasheet
    3D    		1188 A24 to 24-10 to 70 °C
    LF 2005-SDatasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2005-S/SP1Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2005-S/SP10 Datasheet
    3D    		2000 A15 to 24-40 to 70°C
    LF 2005-S/SP3Datasheet
    3D    		2000 A15 to 24-40 to 70°C
    LF 2005-S/SP8Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2005-S/SP11Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2005-S/SP13Datasheet
    3D    		2000 A15 to 24-40 to 80 °C
    LF 2005-S/SP23Datasheet
    3D    		2000 A15 to 24-25 to 70 °C
    LF 2005-S/SP26 Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2010-SDatasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2010-S/SP1Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2010-S/SP6 Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2010-S/SP23 Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2010-S/SP33 Datasheet
    3D    		2000 A15 to 24-40 to 85 °C
    LF 2010-S/SPA1 Datasheet
    3D    		2300 A15 to 24-40 to 85 °C

    LF sensors – ASK FOR SAMPLES / QUOTATIONS

    Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.

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