CASR6-NP/SP5 Current Sensor – The Ideal Choice for Precision Current Measurement

CASR6-NP/SP5 Product Overview

The CASR6-NP/SP5 is a closed-loop fluxgate current sensor from LEM, a world-leading manufacturer of current sensing solutions. Part of the CASR series, it features a multi-range design and accurately measures DC, AC, and pulsed currents while providing galvanic isolation between the primary and secondary circuits.

With its outstanding accuracy, ultra-fast response, and compact PCB-mount design, the CASR6-NP/SP5 is widely used in industrial drives, renewable energy, power supplies, and process automation. It is the trusted choice for engineers seeking high-performance current measurement in demanding applications.

CASR6-NP/SP5 Key Highlights

High Accuracy & Low Drift

Thanks to advanced fluxgate technology, the CASR6-NP/SP5 achieves an exceptional ±0.8% accuracy. It also features very low offset and gain drift, ensuring stable measurement performance even in fluctuating temperature environments. Whether in precision motor control or harsh industrial monitoring, it delivers reliable and consistent data.

Ultra-Fast Response for Transient Capture

With a response time of just 0.3 µs and a bandwidth of up to 300 kHz, this sensor captures every rapid current transient with ease. Such blazing-fast response provides robust data support for real-time critical applications like servo drives and variablefrequency drives.

Wide Range, Flexible Adaptation

The rated measuring current is 6 A, while the measurable range spans from -20 A to +20 A. The bidirectional detection capability makes it suitable for both forward and reverse current measurements. One sensor covers multiple operating conditions, simplifying selection and reducing inventory costs.

Wide Temperature Range for Reliable Operation

Operating over -40°C to +85°C, the CASR6-NP/SP5 performs stably and consistently whether in freezing outdoor environments or high-temperature industrial sites. The plastic housing meets UL 94-V0 flame retardancy standards, ensuring safety.

Compact Design, Easy Integration

Designed for PCB through-hole mounting, it is remarkably compact. Compared to the previous LTS series, its height is reduced by 30%, requiring only about 2.93 cm² of PCB mounting area. For spaceconstrained board designs, the CASR6-NP/SP5 is an ideal solution.

CASR6-NP/SP5 Technical Specifications at a Glance

CASR6-NP/SP5 Typical Applications

With its outstanding performance, the CASR6-NP/SP5 excels in a wide range of industries:

Motor drives & control – AC variable-speed drives, servo drives, elevators, escalators, machine tools

Renewable energy – solar inverters, wind power, photovoltaic systems

Power management – UPS, SMPS, battery charging management

Industrial automation – robotics, process control, condition monitoring

Automotive electronics – battery current sensing in hybrid/electric vehicles, fuel cell control

Welding & power electronics – welding power supplies, static converters

Why Choose the CASR6-NP/SP5?

Original LEM quality – global leader in current sensing, guaranteed performance
5-year warranty – long-term peace of mind
Single-supply operation – works with +5 V, simplifying circuit design
Superior noise immunity – excellent dv/dt immunity for harsh electromagnetic environments
Pin-compatible with the legacy LTS series – seamless upgrade with lower redesign costs
RoHS compliant – environmentally friendly materials