B82721J2401N020

Overview

The B82721J2401N020 is a current-compensated ring core double choke manufactured by EPCOS (TDK Electronics). Designed for power line applications, this component features a ferrite core and radial termination style. It provides an inductance of 39 mH with a tolerance of ±30%. The maximum DC current rating is 400 mA, and the maximum DC resistance is specified at 1.7 Ohms. The device operates within a temperature range of -40 °C to +125 °C and is rated for 250 V AC.

Feature Summary

• Suppresses common-mode interference in compact switch-mode power supplies
• Utilizes a current-compensated ring core design for effective noise filtering
• Constructed with a ferrite core material for stable electromagnetic performance

Applications

• Compact switch-mode power supplies
• General-purpose converters
• Power line chokes for EMI suppression

Procurement Notes

Verify the specific ordering suffix against official EPCOS/TDK documentation to ensure correct electrical characteristics and packaging configuration. Confirm RoHS compliance status and lead-free designation as per the latest manufacturer datasheets before procurement.

Selection Notes

Select this component for applications requiring 39 mH inductance at 400 mA DC current. Ensure the operating environment stays within the -40 °C to +125 °C range. Verify that the radial through-hole mounting fits the PCB layout constraints.

Part Context

This part belongs to the B82721 series of current-compensated ring core double chokes from EPCOS. The series is designed for 250 V AC applications, offering inductances ranging from 0.2 to 39 mH and current capabilities between 0.4 and 6.0 A. These components are standard solutions for power line filtering in industrial and consumer electronics.

Replacement Considerations

Consult official TDK/EPCOS substitution guides for verified alternatives. Cross-reference inductance, current ratings, and physical dimensions when considering equivalent parts from other manufacturers.