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

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	Document	Nominal value	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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