CASR50-NP/SP6 Closed-Loop Fluxgate Current Sensor

CASR50-NP/SP6 Product Overview

The CASR50-NP/SP6 is a high-performance closed-loop fluxgate current sensor from LEM, a world-leading manufacturer of electrical measurement transducers. Built on advanced closed-loop fluxgate technology, this sensor is specifically designed for high-accuracy, fast-response AC/DC current measurement applications, making it an ideal choice for current sensing in power electronics.

With a rated current of 50A, a wide measuring range of ±150A, and a compact PCB-mount design, the CASR50-NP/SP6 readily addresses demanding scenarios ranging from industrial drives to renewable energy systems.

CASR50-NP/SP6 Key Advantages

High Accuracy & Low Drift – Reliable Measurements You Can Trust

Thanks to its closed-loop fluxgate technology, the CASR50-NP/SP6 delivers an outstanding accuracy of ±0.8% and linearity of ±1%. Whether measuring DC, AC, or pulsed currents, it provides stable and trustworthy results. Extremely low offset and gain temperature drift ensure excellent measurement consistency even under complex thermal conditions.

Blazing Fast Response – Capture Every Current Transient

With a response time of just 0.3 µs, the CASR50-NP/SP6 instantly captures every current fluctuation and transient. Whether for overcurrent protection or precision control, it responds without delay, ensuring system safety and performance.

Wide-Temperature Operation – Rugged and Reliable in Harsh Environments

An operating temperature range of -40°C to +85°C enables stable operation in freezing outdoor conditions or hot industrial settings. No matter the climate, the CASR50-NP/SP6 performs consistently.

Compact Design – Simplifies System Integration

Specifically designed for PCB mounting, its compact footprint saves valuable board space. Single +5V supply voltage simplifies power design, reducing system complexity and cost. The UL94V-0 flame-retardant housing adds an extra layer of safety.

Original LEM Quality – A Brand You Can Rely On

As a flagship product from LEM – the global leader in electrical transducers with over 30 years of expertise in railway and industrial applications – the CASR50-NP/SP6 embodies proven quality and reliability. LEM offers products covering a wide range from 0.25A to 10kA and backs them with a 5-year warranty, ensuring long-term peace of mind.

CASR50-NP/SP6 Key Technical Specifications

CASR50-NP/SP6 Typical Applications

With its superior performance and broad applicability, the CASR50-NP/SP6 plays a critical role in numerous power electronics fields:

Motor Drives & Control – AC variable frequency drives, servo motor drives, DC motor drives, static converters

Power Supply Systems – UPS, switch-mode power supplies (SMPS), battery-powered systems

Renewable Energy – Solar inverters, wind turbine converters

Industrial Automation – Industrial robots, cranes, elevator drives

Welding Equipment – Precision current control for welding power sources

Communication Infrastructure – Server power supplies, telecom base station power

Whether you are designing a next-generation servo drive or a highefficiency photovoltaic inverter, the CASR50-NP/SP6 delivers accurate, reliable current sensing for your solution.

Why Choose the CASR50-NP/SP6?

Accurate – ±0.8% accuracy backed by closed-loop fluxgate technology
Fast – 0.3 µs response time, capturing instantaneous current changes without delay
Reliable – Wide –40 °C to +85 °C operating range, suitable for harsh environments
Easy to Use – Single 5 V supply, PCB through-hole mounting, simple integration
Peace of Mind – Original LEM quality, 5-year warranty, and worldwide technical support