B82721J2122N020

Overview

The B82721J2122N020 is a current-compensated ring core double choke manufactured by EPCOS, part of the TDK Electronics group. Designed for power line applications, this component features a ferrite core and polycarbonate case with polyurethane potting. It provides an inductance of 6800 µH (6.8 mH) per winding with a tolerance of ±30%. The rated DC current is 1.2 A, and the maximum DC resistance is 280 mΩ. It operates within a temperature range of -40 °C to +125 °C and supports a rated voltage of 250 V AC.

Feature Summary

• Current-compensated ring core construction minimizes stray inductance for symmetrical interference suppression.
• Flame-retardant polycarbonate case and polyurethane potting ensure mechanical stability and safety compliance.
• Special sector winding technique achieves high resonance frequency for effective noise filtering.

Applications

• Suppression of common-mode interference in compact switch-mode power supplies
• EMI filtering in general-purpose converters
• Power line chokes for AC mains input stages

Procurement Notes

Verify the specific suffix N020 against official EPCOS/TDK documentation to confirm lead length and packaging format. Ensure the application environment remains within the specified -40 °C to +125 °C operating temperature range. Confirm that the 1.2 A DC current rating and 250 V AC voltage rating align with the circuit requirements. Check for RoHS compliance status as indicated in the latest datasheet revisions.

Selection Notes

Select this component when symmetrical common-mode noise suppression is required in space-constrained designs. The current-compensated design allows for higher current handling compared to uncompensated chokes of similar size. Consider the 6800 µH inductance value for the target frequency range of interference. Verify that the radial through-hole mounting style fits the PCB layout constraints.

Part Context

This component belongs to the B82721 series of current-compensated ring core double chokes from EPCOS. The series offers various inductance values and current ratings tailored for power line filtering. These chokes are characterized by their low stray inductance and high efficiency in suppressing electromagnetic interference in AC power inputs.

FAQ

What is the typical stray inductance of the B82721J2122N020?

The component exhibits approximately 1% stray inductance due to its special winding technique, ensuring symmetrical interference suppression.

Is the B82721J2122N020 suitable for high-temperature environments?

Yes, it is designed to operate reliably within a temperature range of -40 °C to +125 °C.