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The NBM-20-221-D is a single-phase power line filter module manufactured by Cosel USA, Inc. It features a two-stage configuration designed for common mode noise suppression. The unit supports an AC voltage rating of 250 VAC and a DC voltage rating of 250 VDC. It handles a continuous current of 20 A with a maximum leakage current of 50 uA. The capacitance value is 220 pF. Installation is facilitated via DIN rail mounting style using screw termination type connections.
Verify the specific suffix requirements against the official Cosel datasheet to ensure correct terminal and mounting configurations. Confirm compliance certifications such as UL, CSA, or VDE are required for the target market. Check lead times as manufacturing cycles may vary. Ensure the input voltage and current ratings match the application load precisely to avoid derating issues.
Select this model when a two-stage filter is required for single-phase applications with a 20 A current capacity. The DIN rail mount style simplifies installation in standard electrical enclosures. Compare leakage current specifications against safety standards if connecting to medical or high-sensitivity loads. Verify that the 220 pF capacitance does not interfere with system grounding requirements.
This component belongs to the NB series of power line filters from Cosel. The series includes variants with different current ratings and capacitance values. The NBM-20-221-D specifically denotes the 20 A current rating and 220 pF capacitance within the DIN rail mounted subset of the family.
Direct substitutes include other Cosel models within the NB series with identical 20 A ratings and DIN rail mounting, such as NBM-20-101-D or NBM-20-331-D, provided the capacitance and leakage current differences are acceptable for the circuit design.