B85321A2105A750

Overview

The B85321A2105A750 is a feed-through capacitor from the EPCOS B85321 series, designed for electromagnetic interference suppression. It features a metal package with panel mount installation and has physical dimensions of 30 mm diameter by 81 mm height. The component operates within a frequency range of 0.01 MHz to 1000 MHz. Key electrical specifications include a rated voltage of 250 V AC (50/60 Hz) or 600 V DC, and a rated current of 75 A at 40 °C. Insertion loss ranges from 5 dB at minimum frequency to 100 dB at maximum frequency.

Feature Summary

• Provides high insertion loss for effective electromagnetic interference filtering across a wide frequency spectrum.
• Utilizes a robust metal package construction suitable for demanding industrial environments.
• Supports high continuous current ratings for power line applications.

Applications

• Industrial automation systems requiring RFI suppression
• Power supply input filtering for electronic equipment
• Electromagnetic compatibility testing setups

Procurement Notes

Verify the specific suffix code against official TDK documentation to confirm exact capacitance and tolerance values. Ensure the procurement channel provides original manufacturer packaging to guarantee component authenticity and traceability. Confirm compliance with RoHS directives if required for the target assembly process.

Selection Notes

Select this component when high current handling capability and significant attenuation are required in a single-phase configuration. Evaluate the thermal environment carefully, as rated current decreases at higher ambient temperatures or frequencies such as 400 Hz. Ensure the mounting panel aperture matches the specified physical dimensions for proper sealing and mechanical stability.

Part Context

This part belongs to the B85321 series of feed-through capacitors manufactured by EPCOS, now part of the TDK Group. These components are engineered for use in EMC filters where space constraints and high performance are critical. The series offers various capacitance values and voltage ratings to suit different power line filtering requirements.

Replacement Considerations

Consult official TDK cross-reference lists for direct substitutes. Verify that any alternative maintains identical pin configurations, voltage ratings, and insertion loss characteristics to ensure circuit compatibility without redesign.

FAQ

How does the rated current change at 400 Hz?

The datasheet specifies that rated current values must be reduced when operating at 400 Hz compared to the standard 50/60 Hz rating.

What is the maximum insertion loss provided by this filter?

The component achieves an insertion loss of up to 100 dB at its maximum operating frequency of 1000 MHz.