NBH-20-681

Overview

The NBH-20-681 is a single-phase EMC/EMI line filter module manufactured by Cosel USA, Inc. It is rated for 250VAC/VDC and supports a continuous current of 20A. The unit utilizes a two-stage filtering architecture to suppress electromagnetic interference on power lines. It features terminal block connections for installation and is designed for chassis mounting applications.

Feature Summary

• Two-stage EMI/EMC filtering architecture
• Terminal block connection interface
• Chassis mount design

Applications

• Industrial equipment power input stages
• Medical device power supplies
• Commercial machinery noise suppression

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as NBH-20-681-D exist with different mounting configurations like DIN rail. Confirm lead times with authorized distributors, as availability may vary between stock and non-stocked items. Ensure the voltage rating matches the system requirements before procurement.

Selection Notes

Select this component for applications requiring robust common-mode and differential-mode noise attenuation in single-phase AC or DC circuits. The 20A rating suits moderate-power industrial loads. Verify physical dimensions and terminal type compatibility with existing panel layouts before integration into the design.

Part Context

This part belongs to the NBH-20 series of power line filters from Cosel. The series offers various current ratings and filtering characteristics. The NBH-20-681 specifically denotes a 20A model within this family, distinguished by its specific capacitance values and housing style compared to other series members.

Replacement Considerations

Direct substitutes are not explicitly confirmed in public documentation. Similar models in the NBH-20 series, such as NBH-20-432, offer comparable electrical ratings but may differ in filtering specifications or mounting options. Cross-referencing datasheets is required for functional equivalence.