B85321A2105A250

Overview

The B85321A2105A250 is a single-phase AC feedthrough capacitor manufactured by EPCOS (TDK Electronics). It features a metal package designed for panel mounting. The component has a rated voltage of 250 V AC at 50/60 Hz and 600 V DC. The rated current is specified as 75 A, although some detailed listings indicate 25 A; the datasheet confirms 75 A. Capacitance is 2 x 0.5 µF. It operates within a frequency range of 0.01 MHz to 1000 MHz, providing insertion loss from 5 dB to 100 dB. Physical dimensions are 30 mm diameter by 81 mm height.

Feature Summary

• Provides effective electromagnetic interference suppression through high capacitance values in a robust metal enclosure.
• Designed for direct panel mounting using threaded studs for secure installation.
• Capable of handling high continuous current loads suitable for industrial power applications.

Applications

• Industrial machinery power input filtering
• Power supply unit EMI suppression
• Electrical cabinet feedthrough filtering

Procurement Notes

Verify the specific rated current requirement against your application load, as sources list both 25 A and 75 A. Confirm the terminal type matches your panel hole configuration. Ensure the operating voltage does not exceed 250 V AC or 600 V DC. Check RoHS compliance status if required by your manufacturing standards. Validate the physical dimensions fit your enclosure space constraints before ordering.

Selection Notes

Select this component when high current capacity and strong attenuation are needed for single-phase AC lines. The metal housing offers superior shielding compared to plastic packages. Consider the thermal derating requirements if ambient temperatures exceed 40 °C. Ensure the mounting method supports the mechanical stress of the threaded stud interface.

Part Context

This part belongs to the B85321 series of feedthrough filters from EPCOS. These components are engineered for EMC compliance in power electronics. The series utilizes ceramic dielectric materials for stability. They are widely used in environments requiring reliable noise reduction on power lines.

Replacement Considerations

Check for exact pinout and dimension compatibility with existing designs. Verify that substitute parts meet the same 75 A current rating and 250 V AC voltage specification. Ensure the replacement maintains the same insertion loss characteristics across the 0.01-1000 MHz range.