B82721J2501N021

Overview

The B82721J2501N021 is a current-compensated ring core double choke manufactured by EPCOS (TDK). It belongs to the B82721 series of power line chokes designed for suppressing common-mode interference. The component features a ferrite core with radial termination and operates within a temperature range of -40°C to +125°C. Rated for 250 V AC, it provides an inductance of 25 mH with a tolerance of 30%. The maximum DC current capability is 500 mA, and the maximum DC resistance is 1.6 Ohms. Physical dimensions are approximately 18.2 mm in length, 13.2 mm in width, and 20.3 mm in height.

Feature Summary

• Designed to suppress common-mode interference in compact switch-mode power supplies and converters
• Utilizes a current-compensated ring core structure for effective noise filtering
• Constructed with a ferrite core material for stable performance across wide temperature ranges

Applications

• Common-mode noise suppression in switch-mode power supplies
• EMI filtering in general-purpose converters
• Power line chokes for electronic equipment requiring 250 V AC isolation

Procurement Notes

Verify the specific suffix N021 against official EPCOS/TDK documentation to confirm exact pin spacing and mechanical tolerances. Ensure the selected variant matches the required inductance and current ratings for the target circuit design. Cross-reference the RoHS compliance status with the latest manufacturer datasheet before integration.

Selection Notes

Select this component when designing circuits that require common-mode noise attenuation in power lines up to 250 V AC. Consider the 500 mA current rating and 25 mH inductance for compatibility with the specific converter topology. Evaluate the radial through-hole mounting style against available PCB space and thermal constraints.

Part Context

This component is part of the B82721 series of current-compensated ring core double chokes from EPCOS (TDK). The series offers various inductance values and current ratings tailored for different power supply applications. These chokes are engineered to meet stringent electromagnetic compatibility requirements in industrial and consumer electronics.

Replacement Considerations

Consult official EPCOS/TDK substitution guides for compatible alternatives within the B82721 family or equivalent series. Verify that any substitute maintains identical electrical parameters, including inductance, current rating, and voltage withstand capabilities.