LA100-P High-Precision Closed-Loop Hall-Effect Current Sensor

Accurate Measurement, Stable & Reliable — A Professional Current Monitoring Solution for Your Power Systems

LA100-P Product Overview

The LA100-P is a high-precision closed-loop Hall-effect current sensor manufactured by LEM, a world-leading brand in sensing technology. Designed for electronic measurement of AC, DC, and pulsed currents, it is widely used in new energy vehicles, industrial power supplies, variable frequency drives, and uninterruptible power supplies. Since its mass production began in 2021, the LA100-P series has shipped over 2 million units globally with a failure rate below 0.02%, earning the trust of customers worldwide through its outstanding quality.

LA100-P Key Advantages

Closed-Loop Hall Technology for Precision Measurement

Utilizing advanced closed-loop magnetic compensation Hall-effect technology, the LA100-P offers higher accuracy and better linearity than traditional open-loop sensors. With an accuracy of ±0.45% and linearity better than ±0.15%, it provides reliable measurement data to help your system achieve precise control and optimized operation.

Ultra-Fast Response, Captures Transients

Response time < 1µs, di/dt tracking capability > 200A/µs – the LA100-P accurately captures transient current fluctuations in your circuits. In energy storage systems, it can advance fault warning time by hundreds of milliseconds, buying precious time for system safety.

Stable Operation Across a Wide Temperature Range

Operating temperature from -40°C to +85°C, maintaining excellent performance even in extreme cold or heat. Real-world data shows linearity error within 0.5% across the full measurement range over the entire temperature range.

Galvanic Isolation for Safety

Complete galvanic isolation between primary and secondary circuits, with an isolation voltage of 2.5 kV (50Hz, 1 minute), effectively protecting sensitive downstream electronics from high-voltage surges, ensuring system safety and reliability. The insulating case meets UL 94-V0 flame retardancy standards.

LA100-P Key Technical Specifications

LA100-P Wide Range of Applications

With its outstanding performance and reliability, the LA100-P is widely used in the following industries:

New Energy Vehicles & Battery Management

Precision charge/discharge current monitoring in Battery Management Systems (BMS)

Current sensing for 800V high-voltage platform electric vehicles

Reduces SOC estimation error, extending driving range per charge

Supports 2000V insulation withstand voltage for high-voltage applications

Industrial Automation & Drives

AC variable frequency drives

Servo motor drive systems

DC motor drive static converters

Power Supplies & Energy Storage

Uninterruptible Power Supplies (UPS)

Switch Mode Power Supplies (SMPS)

Battery-powered systems

PV inverters and energy storage systems

Welding & Power Equipment

Welding power sources

Railway traction systems

Industrial automation control equipment

Why Choose the LA100-P?

Excellent Immunity to Interference

The innovative closed-loop design delivers outstanding resistance to external interference, maintaining stable output even in complex electrical environments.

No Insertion Loss

Closed-loop Hall technology enables non-contact measurement with zero insertion loss, so it does not affect the original performance of your system.

Low Temperature Drift, Long-Term Stability

Excellent temperature drift characteristics across the full operating temperature range ensure long-term measurement stability.

PCB Through-Hole Mounting, Easy Integration

The modular through-hole package allows direct mounting on a PCB. The compact form factor (approx. 18g) simplifies system integration and high-volume production.

Global Brand, Quality Assured

LEM is a world-leading current sensor manufacturer. The LA100-P meets CE, RoHS, and UL international certifications, backed by global technical support and a comprehensive after-sales service system.