B82721S0572A040

Overview

The B82721S0572A040 is a surface-mount common-mode choke from the TDK Electronics (formerly EPCOS) B82721S series. It features a ring core design with a nominal inductance of 1.18 mH and a rated current of 5.7 A at +40°C. The component operates within an inductance range of 0.59 mH to 3 mH and supports rated currents from 2.7 A to 5.7 A across the series. It has a rated voltage of 48 V AC at 50/60 Hz and exhibits approximately 0.8% to 0.9% stray inductance for differential-mode signals.

Feature Summary

• Current-compensated ring core double choke construction utilizing ferrite core technology
• Polycarbonate case with polyurethane potting ensuring flame retardancy per UL 94 V-0 standards
• Sector winding technique designed to achieve high resonance frequency and low stray inductance

Applications

• Data and signal line filtering
• Common-mode interference suppression in power lines
• Differential-mode noise reduction in electronic circuits

Procurement Notes

Verify the specific ordering code against official TDK Electronics documentation to confirm exact electrical parameters, as suffixes define critical specifications. Ensure compatibility with surface-mount assembly processes and check temperature ratings against operational requirements. Cross-reference datasheets for mechanical dimensions and recommended soldering profiles to guarantee reliable integration into final assemblies.

Selection Notes

Select this component based on required nominal inductance and maximum operating current constraints. Evaluate the thermal performance characteristics relative to the expected ambient temperature conditions. Consider the physical footprint and mounting orientation requirements for the target printed circuit board layout. Confirm that the rated voltage meets the system's electrical safety standards.

Part Context

This component belongs to the B82721S series of SMD common-mode chokes manufactured by TDK Electronics. The brand originated as EPCOS, which merged with TDK's components division in 2009 and was renamed TDK Electronics AG in 2018. These chokes are engineered for compact electronic designs requiring effective electromagnetic interference suppression in space-constrained applications.

Replacement Considerations

Consult official TDK Electronics substitution guides for verified equivalent part numbers. Do not assume functional interchangeability with generic components without validating inductance, current rating, and mechanical fit against original specifications.