LA150P HighPrecision ClosedLoop HallEffect Current Transducer

Precision, Reliability, and Efficiency – Designed for Industrial Automation and New Energy Systems

LA150-P Product Overview

The LA150P is a highprecision closedloop Halleffect current transducer from LEM (Switzerland), specifically designed for electronic measurement of DC, AC, and pulsed currents. It provides galvanic isolation between the primary (highpower) and secondary (electronic) circuits, making it an excellent choice for industrial automation, variable frequency drives, new energy equipment, and power system monitoring.

As a global leader in current sensing technology with over 40 years of experience, LEM has made the LA150P a benchmark for highperformance current measurement. Whether in harsh industrial environments or demanding precision control systems, the LA150P delivers stable and accurate current data to support your applications.

LA150-P Key Parameters & Technical Specifications

LA150-P Technical Advantages – Why Choose the LA150P?

Closed-Loop Hall-Effect Technology for Superior Performance

The LA150-P uses closed-loop (compensated) Hall-effect technology, dynamically balancing the magnetic field generated by the primary current with that of a secondary compensation coil to achieve a zero-flux state. Compared to open-loop sensors, closed-loop sensors offer significant advantages in accuracy, linearity, temperature stability, bandwidth, and response time – ideal for applications requiring precise current control.

±0.5% Accuracy for Demanding Measurements

At 25°C, the LA150-P provides ±0.5% accuracy with a linearity error below ±0.1%. Even across the wide operating range of -40°C to +85°C, temperature drift is well controlled, ensuring reliable measurement over the entire temperature range. In one new energy vehicle production line, the adoption of the LA150P reduced motor controller failures by 42% – a testament to its proven reliability.

Microsecond Response Time to Capture Fast Transients

With a response time of less than 0.5 µs, the LA150P accurately tracks current slew rates >200 A/µs. Its 150 kHz bandwidth enables detection of current spikes lasting only 5 µs, making it perfect for high-frequency dynamic applications such as inverter testing and motor start-stop control.

Safe and Reliable Galvanic Isolation

The LA150-P provides up to 4.3 kVrms galvanic isolation between primary and secondary circuits, effectively protecting operators and preventing highside interference from affecting low-voltage control electronics. The insulating plastic housing meets UL 94-V0 flammability rating, ensuring both insulation safety and flame retardancy.

Excellent Noise Immunity & Overload Capability

Designed for high electromagnetic immunity, the LA150-P maintains stable measurement accuracy even in noisy industrial environments. It also withstands instantaneous current overloads, providing ample protection margin for your system.

Low Insertion Loss for High Efficiency

As with most magnetic sensing technologies, the LA150-P introduces very low insertion loss, imposing no additional energy penalty on the primary circuit and contributing to overall system efficiency.

Wide Range of Applications

Thanks to its high accuracy, fast response, and wide bandwidth, the LA150-P has been successfully deployed in: