B82731T2451A020

Overview

The B82731T2451A020 is a current-compensated E-core double choke manufactured by EPCOS (TDK). It features a nominal inductance of 47 mH with a tolerance range of -30% to +50%. The component supports a rated current of 0.45 A and operates at a rated voltage of 250 V AC. Key electrical parameters include a maximum DC resistance of 2.8 Ohms per winding. The device utilizes a wirewound technology with a ferrite core, housed in an open radial package measuring 21.5 mm in width and 13.5 mm in height.

Feature Summary

• Current-compensated design for effective common-mode noise suppression
• E-core construction providing high inductance stability
• Radial through-hole mounting for standard PCB integration

Applications

• Power line chokes in AC mains filtering circuits
• EMI suppression in industrial electronic equipment
• Common-mode interference reduction in information technology hardware

Procurement Notes

Verify the specific inductance tolerance (-30%/+50%) and DC resistance (2.8 Ohms) against circuit requirements. Confirm the 250 V AC rating aligns with the target application's voltage levels. Ensure the radial lead spacing matches the PCB footprint. Cross-reference the manufacturer part number with official TDK/EPCOS documentation to confirm availability and revision status before finalizing procurement.

Selection Notes

Select this component when a high-inductance common-mode choke is required for low-current AC applications up to 0.45 A. The wide inductance tolerance allows for cost-effective sourcing where precise inductance values are not critical. The open E-core structure facilitates efficient thermal dissipation. Consider the physical dimensions (21.5 x 13.5 mm) for enclosure space constraints during the design phase.

Part Context

This component belongs to the B82731T series of current-compensated double chokes designed for power line filtering. These devices are engineered to attenuate common-mode electromagnetic interference in AC power supplies. The series offers various inductance values ranging from 3.3 mH to 100 mH, catering to different current ratings between 0.3 A and 1.8 A. The B82731T2451A020 represents a mid-range inductance option within this family.

Replacement Considerations

Consult official TDK/EPCOS documentation for direct cross-references. Verify that any substitute maintains the 47 mH nominal inductance, 0.45 A current rating, and 250 V AC voltage rating. Ensure mechanical compatibility regarding the radial lead configuration and case dimensions.