L185XF4S-T

Overview

The L185XF4S-T is a surface-mount low-pass filter manufactured by Knowles Dielectric Labs. It operates at a cutoff frequency of 18.5 GHz with a nominal impedance of 50 Ohms. The device features an insertion loss of 2.2 dB and utilizes SMD/SMT termination types for board mounting. It functions within a temperature range of -55°C to +125°C and is supplied in reel packaging.

Feature Summary

• Surface-mount construction for automated PCB assembly
• Low-pass filtering capability at 18.5 GHz
• 50 Ohm system impedance compatibility

Applications

• RF signal conditioning circuits
• Microwave communication systems
• Test and measurement equipment

Procurement Notes

Verify the specific suffix against official documentation, as it may indicate packaging variations rather than functional changes. Confirm availability status through authorized channels, as supply constraints may apply. Ensure the component meets RoHS compliance requirements if mandated by your project specifications before finalizing procurement orders.

Selection Notes

Select this component when a 18.5 GHz low-pass response is required in a compact surface-mount form factor. Consider the 2.2 dB insertion loss specification relative to system power budgets. Verify that the 50 Ohm impedance matches the surrounding RF trace design to ensure proper signal integrity and minimize reflections in high-frequency applications.

Part Context

This part belongs to the Knowles Dielectric Labs surface-mount filter portfolio, designed for high-frequency signal processing. It complements other bandpass and low-pass variants in the series, offering standardized impedance and thermal performance suitable for modern electronic designs requiring reliable RF filtering solutions.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify that any replacement maintains the 18.5 GHz cutoff frequency, 50 Ohm impedance, and similar insertion loss characteristics to ensure circuit functionality remains unaffected during component swaps.