B85121A2475A101

Overview

The B85121A2475A101 is an EMI feedthrough filter capacitor manufactured by EPCOS, now part of TDK Electronics. This component features a capacitance value of 4.7 µF and a rated voltage of 600V. It is designed for axial mounting and supports a current rating of 100 A. The device operates within a temperature range of -40°C to +85°C. Classified as obsolete, this feed-through capacitor was utilized for high-current filtering applications in industrial and power electronics systems.

Feature Summary

• Provides electromagnetic interference suppression through feedthrough capacitor architecture
• Supports high continuous current handling capabilities for robust circuit protection
• Designed for axial leaded mounting configurations

Applications

• Power supply filtering in industrial equipment
• EMI suppression in high-voltage electronic circuits
• Electromagnetic compatibility enhancement in power conversion systems

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Procurement requires verification of availability through secondary distributors or surplus channels. Buyers must confirm the authenticity of the source and inspect the physical condition of the axial leads and casing before integration into new designs. Legacy system maintenance may require sourcing alternative obsolete stock.

Selection Notes

Engineers should evaluate the 4.7 µF capacitance and 600V rating against specific circuit requirements. The 100 A current capacity is a critical parameter for high-power filtering tasks. Due to the obsolete status, design teams must assess long-term supply chain risks and consider redesigning with currently available components that meet similar electrical specifications and form factors.

Part Context

EPCOS was acquired by TDK Corporation, merging their passive component portfolios. The B85121 series represents a line of feedthrough capacitors designed for effective noise reduction in demanding environments. This specific model falls under the broader category of EMI filters used to protect sensitive electronics from conducted interference.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official TDK Electronics catalogs for current equivalents or perform a functional replacement analysis based on capacitance, voltage, and current ratings.