FK2125T107AL-T

Overview

The FK2125T107AL-T is a multilayer EMI suppression filter from Taiyo Yuden, housed in an 0805 (2012 metric) surface-mount package. It features a T-type LC circuit topology designed for high-frequency noise attenuation. Key electrical specifications include a cutoff frequency of 200 MHz with a tolerance of +/-40 MHz, a maximum DC current rating of 100 mA, and a rated voltage of 10 VDC. The component exhibits a minimum insulation resistance of 30 MΩ and provides at least 20 dB of attenuation at 500 MHz. It operates within a temperature range of -25°C to +85°C.

Feature Summary

• Integrates a third-order low-pass LC filter structure within a compact SMD footprint
• Provides effective electromagnetic interference suppression for high-speed signal lines
• Designed for direct integration into portable electronic device circuits

Applications

• Noise filtering on USB data lines
• EMI suppression for mobile phone RF modules
• Signal line protection in portable communication devices

Procurement Notes

Verify the specific suffix AL-T against official Taiyo Yuden documentation to confirm exact electrical tolerances and termination specifications. Confirm availability status as distribution channels may list discontinued or limited-stock items. Ensure compatibility with PCB footprint dimensions of 2.0 mm by 1.25 mm before finalizing procurement orders.

Selection Notes

Select this component when space-constrained designs require robust EMI filtering without adding discrete inductors or capacitors. The 0805 package allows for dense board layouts while maintaining adequate current handling for low-power signal paths. Evaluate the 200 MHz cutoff frequency against target noise spectra to ensure sufficient attenuation margins are met.

Part Context

This part belongs to the T-series of multilayer EMI filters manufactured by Taiyo Yuden. These components utilize proprietary ceramic materials to achieve high Q-factors and stable performance across varying temperatures. The series is widely adopted in consumer electronics for its ability to suppress broadband noise in minimal space.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Engineers should consult official Taiyo Yuden cross-reference guides or datasheets for verified alternatives.