LEM LA 25-NP/SP13 Closed-Loop Hall Effect Current Sensor

LA 25-NP/SP13 Product Overview

The LA 25-NP/SP13 is a high-precision current sensor based on closed-loop Hall effect technology, from LEM (Switzerland), the global leader in electrical measurement. As a high-performance derivative of the LA 25-NP series, it is designed for electronic measurement of DC, AC, and pulsed currents, with galvanic isolation between the primary and secondary circuits.

The sensor operates on a ±15V bipolar supply, with a rated current of 0.5A, a measuring range of ±0.72A, and a 25mA current output. Featuring PCB through-hole mounting with standard pins for both primary and secondary connections, it is exceptionally easy to integrate and is widely recognized as the industry benchmark for low-current precision measurement.

With ±0.5% high accuracy, <0.2% linearity, and DC~150kHz high bandwidth, the LA 25-NP/SP13 provides a cost-effective closed-loop Hall solution for applications requiring fine current monitoring, such as laboratory power supplies, battery management systems, and precision servo drives.

Its wide operating temperature range of -40℃ to +70℃ and EN 50155 railway standard certification enable it to perform reliably in harsh industrial environments.

LA 25-NP/SP13 Key Technical Specifications

LA 25-NP/SP13 Key Advantages

High Cost-Performance Closed-Loop Solution for Low Currents: Optimized specifically for 0.5A precision measurement — provides far superior measurement stability compared to open-loop sensors

<1µs Fast Response + 150kHz High Bandwidth: Response time <1µs, bandwidth up to 150kHz — accurately captures fast transients in low currents

±0.5% Accuracy + <0.2% Linearity: Closed-loop compensation eliminates core saturation effects — accurate measurement across the full range — meets precision control requirements

Superior Noise Immunity + Low Temperature Drift: Closed-loop architecture provides high external magnetic field rejection — stable operation in complex EMI environments — minimal temperature drift maintains accuracy across full temperature range

2.5kV High-Voltage Isolation + 16kV Impulse Withstand: Reinforced insulation between primary and secondary — EN 50178 compliant — meets 600V reinforced insulation and 1700V basic insulation requirements

Ultra-Compact PCB Mount Design: Ultra-light 22g weight — standard PCB pin package — easily integrates into various circuit boards — greatly enhances design flexibility

EN 50155 Railway Standard Certified: Complies with railway rolling stock equipment standards — suitable for trackside and onboard harsh environments

5-Year Factory Warranty: LEM quality commitment — long-term supply assurance

Why Choose the LA 25-NP/SP13?

Tailored for 0.5A Low Currents: Most current sensors have larger rated currents with poor accuracy at low current ranges — the LA 25-NP/SP13 is specifically optimized for 0.5A range, making it the ideal choice for precision low-current measurement

±0.5% High Accuracy + <0.2% Linearity: Closed-loop compensation ensures accurate measurement across the full range — meets precision application requirements such as laboratory power supplies and battery management

<1µs Fast Response: Accurately captures current spikes during load changes — provides timely and reliable triggering signals for overcurrent protection

150kHz High Bandwidth: Accurately measures current waveforms up to 150kHz — perfectly matches the output characteristics of modern high-frequency switching power supplies

2.5kV High-Voltage Isolation: Reinforced insulation between primary and secondary — EN 50178 compliant — ensures control system safety

-40℃~+70℃ Wide Temperature Operation + EN 50155 Certified: Certified to railway rolling stock equipment standards — suitable for trackside equipment, outdoor enclosures, and other harsh temperature environments

Ultra-Compact PCB Package: 22g ultra-light weight — standard pin design — easily integrates into various circuit boards — greatly enhances design flexibility

LA 25-NP/SP13 Target Applications

Precision Power Supplies & Laboratory Equipment: High-precision power supply output current monitoring, calibration

Battery Management Systems: Battery pack charge/discharge low-current monitoring

AC Variable Frequency Drives & Servo Drives: Low-power motor current feedback control

Uninterruptible Power Supplies (UPS): Auxiliary power supply current monitoring

Switch-Mode Power Supplies (SMPS): High-frequency switching current waveform capture

Renewable Energy Systems: Low-power inverter current detection

Railway Onboard Equipment: EN 50155 compliant — suitable for trackside and onboard applications