B82721K2301N020

Overview

The B82721K2301N020 is a current-compensated ring core double choke from the EPCOS (TDK) B82721A/K series. It features a ferrite core with epoxy coating and a polycarbonate case, designed for power line applications up to 250 V AC. The component provides an inductance of 47 mH per winding at a rated current of 0.3 A. It utilizes a sector winding technique and polyurethane potting for stability. The device operates within a temperature range of -40°C to +125°C and supports through-hole mounting.

Feature Summary

• Current-compensated design for effective common mode noise suppression
• Ferrite core construction with UL 94 V-0 rated epoxy coating
• Polyurethane potting for mechanical and environmental protection
• Sector winding technology for consistent electrical performance

Applications

• Power line filtering in electronic equipment
• Common mode interference suppression in AC mains circuits
• EMI reduction in industrial control systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct packaging and tolerance specifications. Confirm that the 47 mH inductance and 0.3 A rated current align with the target circuit requirements. Check for RoHS compliance status as defined in the official product documentation before finalizing procurement.

Selection Notes

Select this component when a high-inductance common mode choke is required for low-current AC lines. The 47 mH value offers significant attenuation for high-frequency noise. Ensure the PCB layout accommodates the horizontal mounting style and the specified footprint dimensions. Consider the thermal environment, as the operating range extends to 125°C.

Part Context

This part belongs to the B82721A/K family of power line chokes manufactured by EPCOS (now TDK Electronics). These components are engineered for robust performance in demanding electromagnetic compatibility scenarios. The series is widely used in global electronics manufacturing to meet regulatory standards for conducted emissions.

Replacement Considerations

Consult the official cross-reference list for verified substitutes. Ensure any replacement maintains the 47 mH inductance, 0.3 A current rating, and compatible mounting dimensions.