CKSR 25-NP

Current Sensors Overview

The CKSR 25-NP is a fluxgate-based, closed-loop current transducer manufactured by LEM USA Inc. It features a single channel with bidirectional polarity and module packaging for through-hole installation. The device supports AC/DC measurement with a frequency range of DC to 300kHz. Key electrical parameters include ±0.8% accuracy, ±1% linearity, and a response time of 0.3µs. It operates on a single supply voltage of 4.75V to 5.25V with a maximum supply current of 20mA. The sensor handles a detection current of 25A and functions within a temperature range of -40°C to 105°C.

Current Sensors Feature Summary

• Utilizes fluxgate technology for high-precision closed-loop compensation.
• Features isolated plastic case construction with higher creepage and clearance distances.
• Designed for compact applications with single +5V supply operation.
• Provides reference access and includes four primary pins for integration.

Current Sensors Applications

• Industrial motor drives
• Switch-mode power supplies
• Inverter control circuits

Current Sensors Procurement Notes

Verify the specific part number against official LEM documentation to ensure compatibility with design requirements. Confirm that the component meets all necessary safety and isolation standards for the intended application environment. Check for any obsolescence notices or recommended alternative parts if the component status has changed. Ensure that the procurement source provides valid traceability and authenticity guarantees for electronic components.

Current Sensors Selection Notes

Select this component when high bandwidth and precision are required for current monitoring in compact spaces. The single-supply architecture simplifies power management compared to dual-supply alternatives. Consider the thermal performance and operating temperature range to ensure reliability under varying environmental conditions. Evaluate the physical dimensions and pin configuration to verify fit within the target PCB layout constraints.

Current Sensors Part Context

The CKSR series represents LEM's compact fluxgate current sensors designed for industrial and railway applications. These transducers offer superior performance characteristics compared to traditional Hall-effect sensors, particularly in terms of bandwidth and linearity. The NP suffix typically denotes a specific package variant optimized for through-hole mounting and robust mechanical stability in demanding environments.

Current Sensors Replacement Considerations

Consult official LEM documentation for verified substitute part numbers. Cross-reference technical specifications such as accuracy, bandwidth, and supply voltage to ensure functional equivalence. Verify that any replacement maintains the required isolation ratings and physical footprint for direct board compatibility.