LA 130-P , LA130-P

LA130-P LEM Current Transducer

– Precision Measurement · High Reliability · Industrial Hall-Effect Closed-Loop Sensor –

LA130-P Product Overview

The LA130-P is a high-performance Hall-effect closed-loop current transducer from LEM, a world leader in electrical parameter measurement solutions. Designed for precision industrial current monitoring, it is widely used in AC variable frequency drives, servo motor controls, switching power supplies, UPS systems, and battery management systems. It is an ideal choice for engineers who need accurate measurement of DC, AC, and pulsed currents.

LA130-P Key Specifications

LA130-P Product Highlights

High-precision closed-loop measurement

Using closed-loop (compensated) Hall-effect technology, the LA130-P continuously compensates for flux variations in the magnetic core, delivering ±0.5% accuracy and ±1% linearity. Whether in DC or complex AC harmonic environments, it provides stable, consistent output. At +25℃ ambient temperature, accuracy reaches ±0.5% of IPN.

Galvanic isolation for safety

Complete electrical isolation between the primary circuit (current under test) and secondary circuit (measurement/control electronics) with an isolation test voltage of 4.3 kVRMS, and creepage/clearance distance of 8 mm + CTI 600. This effectively isolates high voltage from low voltage circuits, protecting delicate control electronics from surges and ensuring system safety.

Wide bandwidth, ultra-fast response

Frequency response from DC to 150 kHz allows measurement from DC to high-frequency AC waveforms. Response time is only 0.5 µs (300 ns for some specifications), making it ideal for fast-responding applications such as short-circuit protection and overcurrent detection.

Bidirectional measurement, no insertion loss

Supports bidirectional current detection. The single-aperture design (13.5×10 mm opening) allows installation without cutting existing cables and introduces zero insertion loss.

Rugged and reliable in harsh environments

Operating temperature range -40℃ to +85℃ ensures long-term stable operation in industrial environments. The UL 94-V0 flame-retardant plastic housing provides high immunity to external electromagnetic interference.

Swiss quality, 5year warranty

LEM is a global leader in sensor technology. Every product undergoes rigorous quality control and certification. The LA130-P comes with a 5year warranty for complete peace of mind.

LA130-P Typical Applications

Thanks to its outstanding performance, the LA130-P is widely used in:

Industrial drives & control – AC frequency converters, servo motor drives, DC motor static converters

Power management systems – switching mode power supplies (SMPS), uninterruptible power supplies (UPS)

Renewable energy & energy storage – battery-powered systems, solar/wind power generation

Welding equipment – welding power supply current monitoring

Railway & transportation – traction system current measurement

Smart appliances – current detection in air conditioners, variable-frequency appliances

"LEM products are widely used in drives and welding, renewable energy and power supplies, traction, high precision, conventional and hybrid/electric vehicles." – LEM official

Why Choose the LA130-P?

Compared to traditional shunts – Galvanic isolation eliminates safety hazards in high-voltage applications and avoids power loss.
Compared to open-loop Hall sensors – Closed-loop design delivers better accuracy, linearity, and lower temperature drift.
Compared to current transformers – Capable of measuring DC currents and complex waveforms with excellent lowfrequency response.

The unified package is designed for 130~150 ARMS current measurement and supports direct PCB mounting for easy integration into various circuit boards.