NBM-20-221

Overview

The NBM-20-221 is a single-phase power line filter module manufactured by Cosel USA, Inc. It supports AC 1-250 VAC and DC 250 VDC operation with a current rating of 20 A. The unit features a two-stage configuration and utilizes push-down terminal connections for chassis mounting. Leakage current is specified at 12.5 uA or 25 uA maximum depending on the variant. The component belongs to the NB series and is designed for general-purpose applications requiring low leakage current performance.

Feature Summary

• Two-stage filtering architecture for enhanced noise suppression
• Low leakage current design suitable for sensitive equipment
• Chassis mount construction with push-down terminal termination

Applications

• General purpose industrial electronics
• Medical equipment power supplies
• Communication systems

Procurement Notes

Verify the specific leakage current requirement (12.5 uA vs 25 uA) against the datasheet before ordering. Confirm that the chassis mount style and push-down terminals are compatible with the intended enclosure design. Ensure the 20 A current rating meets the system load requirements. Check standard lead times as availability may vary by distributor.

Selection Notes

Select this model when low leakage current is critical for safety compliance or signal integrity. The two-stage design offers superior attenuation compared to single-stage alternatives. Ensure the operating voltage does not exceed 250 VAC or 250 VDC. Consider the physical dimensions for chassis integration and verify terminal compatibility with existing wiring harnesses.

Part Context

This component is part of the Cosel NB series of power line filters. The series includes variants with different current ratings such as 30 A models. The NBM-20-221 specifically denotes the 20 A rating within this family. It is distinct from DIN rail mounted versions which carry different suffixes in the product numbering scheme.

Replacement Considerations

Direct substitutes include other Cosel NBM series modules with identical electrical specifications. Verify pinout and mechanical dimensions when considering cross-brand replacements. Ensure the replacement maintains the same leakage current limits and voltage ratings.