DKFP-B22B-D439

Common Mode Chokes Overview

The DKFP-B22B-D439 is a current compensated noise suppression choke from the Schurter DKFP series, designed for through-hole PCB mounting. It features a single channel configuration with an inductance of 39 mH and a maximum DC current rating of 400 mA. The component exhibits a maximum DC resistance of 1.286 ohms and a self-resonant frequency of 150 kHz. It operates within a temperature range of -40°C to +125°C and measures 18.5 mm in length, 18 mm in width, and 13 mm in height.

Common Mode Chokes Feature Summary

• Magnetically compensated design for effective common mode noise suppression
• Through-hole terminals providing multiple PCB mounting options
• Compact form factor suitable for space-constrained applications

Common Mode Chokes Applications

• Current compensated noise suppression circuits
• Common mode filtering in electronic assemblies
• Power supply input stages requiring EMI reduction

Common Mode Chokes Procurement Notes

Verify the complete part number including suffixes against official Schurter documentation to ensure correct electrical specifications. Confirm that the through-hole package dimensions match the target PCB footprint. Check for RoHS compliance status if required by specific regulatory standards. Ensure the operating temperature range aligns with the final application environment.

Common Mode Chokes Selection Notes

Select this component when high inductance is required at low current levels for common mode noise attenuation. The 400 mA rating defines the maximum continuous current before saturation effects may occur. Consider the 1.286 ohm DC resistance impact on voltage drop in the circuit path. Evaluate the 150 kHz self-resonant frequency relative to the target noise spectrum.

Common Mode Chokes Part Context

This component belongs to the DKFP series of current compensated chokes manufactured by Schurter Inc. These devices are engineered to provide magnetic compensation, reducing the external magnetic field compared to standard common mode chokes. The series offers various inductance and current ratings to suit different filtering requirements while maintaining a compact physical profile.

Common Mode Chokes Replacement Considerations

Direct substitutes include other DKFP series variants such as DKFP-B21B-D439 or DKFP-B22B-D349, provided their electrical parameters match the design requirements. Verify pin compatibility and mechanical dimensions before substitution.