B82721S0322A020

Overview

The B82721S0322A020 is a current-compensated ring core double choke designed for data and signal line filtering. It features a maximum DC current rating of 3.2 A and a typical maximum DC resistance of 0.05 Ohms. The component supports a rated voltage of 48 VAC or 80 VDC, with a withstand voltage of 1 kVrms. It operates within a temperature range of -40 to 125°C and meets the AEC-Q200 automotive qualification standard.

Feature Summary

• Current-compensated ring core design utilizing ferrite core technology for symmetrical interference suppression.
• Constructed with a polycarbonate case and polyurethane potting for structural integrity.
• Sector winding technique ensures high resonance frequency characteristics.
• Flame-retardant case and potting material compliant with UL 94 V-0 standards.

Applications

• Data and signal line common-mode filtering
• Automotive electronic circuit protection
• Power line noise suppression

Procurement Notes

Verify the specific ordering code against official TDK Electronics documentation to ensure correct inductance and current ratings. Confirm that the AEC-Q200 qualification status aligns with your project's automotive reliability requirements. Check soldering method compatibility, as the component supports both reflow and iron soldering processes. Ensure voltage ratings match the operational environment to prevent dielectric breakdown.

Selection Notes

Select this component when high DC current handling up to 3.2 A is required alongside effective common-mode noise reduction. The low DC resistance minimizes power loss in signal lines. Consider the operating temperature range of -40 to 125°C for harsh environments. Verify that the 48 VAC/80 VDC voltage rating suits the system's electrical specifications before integration.

Part Context

This component belongs to the B82721 series of current-compensated ring core double chokes manufactured by EPCOS, now part of TDK Electronics. These devices are engineered for robust electromagnetic interference suppression in sensitive electronic circuits. The series utilizes specialized winding techniques to achieve high performance in compact surface-mount packages suitable for automated assembly.

Replacement Considerations

Consult official TDK Electronics substitution guides for verified equivalents. Cross-reference parameters such as inductance, DC current, and physical dimensions to ensure functional compatibility. Generic substitutes may not meet the AEC-Q200 automotive qualification or specific flame-retardant requirements.