NBM-20-331

Overview

The Cosel NBM-20-331 is a single-phase power line filter designed for AC and DC applications. It supports voltage ratings of 250 VAC and 250 VDC with a current rating of 20 A. The unit features a capacitance of 330 pF, resulting in maximum leakage currents of 37.5 uA for AC and 75 uA for DC. It utilizes push-down terminals for connection and is intended for DIN rail mounting.

Feature Summary

• Low leakage current design suitable for sensitive medical or precision equipment
• Dual-stage filtering capability for enhanced EMI/EMI suppression
• Push-down terminal interface for simplified wiring installation

Applications

• Medical device power supplies requiring low leakage safety compliance
• Industrial control systems needing DIN rail mounted EMC filtering
• Precision instrumentation power conditioning

Procurement Notes

Verify the specific suffix (e.g., -D) required for your application, as it may indicate terminal type or packaging variations. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure input voltage and current ratings match system requirements to prevent component failure.

Selection Notes

Select this model when low leakage current is critical, such as in patient-connected medical devices. Compare capacitance values against other series members like NBM-20-221 or NBM-20-471 if different filtering characteristics are needed. Verify mounting style compatibility with existing DIN rail infrastructure.

Part Context

This component belongs to the Cosel NB series of power line filters. The series offers various capacitance options to tailor leakage current performance. The NBM-20-331 specifically provides a balance between filtering effectiveness and minimal leakage, distinguishing it from higher-capacitance variants in the same family.

Replacement Considerations

Direct substitutes within the same series include NBM-20-221 and NBM-20-471. These alternatives offer different capacitance values and corresponding leakage current specifications. Verify that the replacement part meets the same voltage, current, and mounting requirements.