DK 400 B420

Current Sensors Overview

The LEM DK 400 B420 is a panel-mount current transducer from the DK-B420 series, designed for measuring direct currents up to 400 A. It features a 21.7 mm bore and utilizes Hall effect technology for galvanic isolation. The device operates with supply voltages of 20 V DC or 50 V AC/DC. It provides an analog output signal proportional to the primary current, ensuring high accuracy and stability. The unit weighs 120 g and functions within a temperature range of -20°C to +50°C.

Current Sensors Feature Summary

• Galvanic isolation between primary circuit and secondary electronics
• Panel mounting configuration with integrated screw terminals
• High precision measurement capability for DC applications

Current Sensors Applications

• Industrial process control systems
• Energy management and monitoring equipment
• Power supply units and battery chargers

Current Sensors Procurement Notes

Verify the specific suffix (B420) against official LEM documentation to confirm voltage compatibility and output type. Ensure the required primary current rating matches the 400 A specification. Confirm that the panel cutout dimension aligns with the 21.7 mm bore requirement. Check for any regional certification requirements such as IEC 61010-1 compliance before finalizing procurement.

Current Sensors Selection Notes

Select this model when precise DC current measurement is required in industrial environments. The panel mount design suits fixed installations where space is limited but accessibility for wiring is needed. Consider the operating temperature range and supply voltage options to ensure compatibility with existing system power rails. Verify that the output signal type meets the input requirements of the connected control or monitoring device.

Current Sensors Part Context

This component belongs to the LEM DK series of current transducers, which are widely used for isolated current sensing. The DK-B420 variant specifically targets applications requiring robust performance and standard voltage outputs. It complements other LEM products like the LF and HMSR series by offering a cost-effective solution for medium-range DC current monitoring in stationary equipment.

Current Sensors Replacement Considerations

Direct replacements must match the 400 A rating, 21.7 mm bore, and panel mount form factor. Verify electrical compatibility including supply voltage and output signal characteristics. Cross-reference with LEM's official substitution guide to ensure equivalent performance metrics and safety certifications are maintained.