NBM-30-221

Overview

The Cosel NBM-30-221 is a single-phase power line filter designed for AC 250V and DC 250V applications. It features a 30A current rating and utilizes push-down terminal connections for chassis mounting. The unit provides low leakage current, specified at a maximum of 25 µA or 50 µA depending on configuration. It incorporates a capacitance value of 220 pF and is classified as a two-stage EMC/EMI filter within the NB series.

Feature Summary

• Low leakage current design suitable for sensitive medical or safety-critical equipment
• Two-stage filtering architecture for enhanced EMI suppression
• Chassis mount construction with push-down terminal interface

Applications

• Medical device power input protection
• Industrial control system noise reduction
• Safety-critical electronic equipment filtering

Procurement Notes

Verify the specific suffix (e.g., -D) required for your application, as it may indicate terminal block variations. Confirm lead times with authorized distributors, as production cycles can vary. Ensure the chassis mounting style and push-down terminals match your enclosure design constraints before ordering.

Selection Notes

Select this model when a 30A rating and 250VAC/VDC operation are required. The low leakage current specification is critical for compliance with medical safety standards. Verify that the 220 pF capacitance does not interfere with upstream circuit requirements. Ensure adequate chassis space for the physical dimensions associated with this filter class.

Part Context

This component belongs to the Cosel NB series of power line filters. It is part of a family offering various current ratings and voltage configurations. The NBM-30-221 specifically addresses high-current applications requiring strict leakage current limits. It complements other models in the series such as the NBH variants which may differ in terminal style.

Replacement Considerations

Direct substitutes include the NBH-30-221, though terminal types may differ. Verify electrical parameters match exactly. No other direct cross-references are confirmed in public documentation.