NBM-20-101-D

Overview

The Cosel NBM-20-101-D is a single-phase, two-stage power line filter designed for AC 1-250 VAC and DC 250 VDC applications. It supports a continuous current rating of 20 A with a maximum leakage current of 37.5 uA (typical) or 75 uA (maximum). The unit features a low capacitance value of 330 pF to minimize ground loop currents. It utilizes push-down terminal connections and is engineered for DIN rail mounting. The device operates within a temperature range of -40°C to +85°C and holds UL, CSA, VDE, and ENEC certifications.

Feature Summary

• Low leakage current design suitable for sensitive medical and IT equipment
• Two-stage filtering architecture for enhanced EMI/EMI suppression
• DIN rail mounting configuration for standardized panel integration

Applications

• Medical diagnostic equipment requiring strict leakage current limits
• Industrial control systems utilizing DIN rail infrastructure
• Information technology hardware demanding high reliability

Procurement Notes

Verify the specific suffix designation during procurement to ensure correct termination style and mounting configuration. Confirm that the required leakage current specifications align with the 37.5 uA typical rating. Ensure compatibility with existing DIN rail standards in the target enclosure. Cross-reference certification requirements such as UL or VDE against regional regulatory mandates before finalizing orders.

Selection Notes

Select this model when chassis mounting is not feasible due to space constraints, necessitating DIN rail installation instead. Choose this variant over standard leakage filters if system safety regulations mandate leakage currents below 3.5 mA. Consider the 330 pF capacitance value for applications where neutral-to-ground voltage rise must be minimized. Validate that the 20 A current rating exceeds the peak load requirements of the protected circuitry.

Part Context

This component belongs to the Cosel NBM series of power line filters, which are engineered for general-purpose EMC compliance. The series offers various configurations differing by current rating, mounting style, and leakage characteristics. The NBM-20-101-D specifically addresses the need for low-leakage performance in DIN rail-mounted industrial and medical environments.

Replacement Considerations

NBM-20-101 is a chassis-mount equivalent with identical electrical ratings but different physical mounting. NBM-20-000-D is a DIN-rail mount alternative within the same series, potentially differing in leakage current or capacitance values. Verify mechanical dimensions and terminal types when substituting.