L185XF4W-T

Overview

The L185XF4W-T is a low-pass filter manufactured by Knowles Dielectric Labs, designed for high-frequency signal conditioning applications. It operates with a cutoff frequency of 18.5 GHz and provides a bandwidth of 18 GHz. The component features an insertion loss of 2.2 dB and maintains a system impedance of 50 Ohms. It utilizes SMD/SMT termination styles for board mounting and functions within a temperature range of -55°C to +125°C.

Feature Summary

• Provides low-pass filtering characteristics for radio frequency signal paths
• Supports surface mount installation for automated assembly processes
• Operates reliably across extended industrial temperature ranges

Applications

• High-frequency RF signal conditioning circuits
• Wire bond interconnect applications requiring low-pass filtering
• Microwave communication systems operating near 18.5 GHz cutoff

Procurement Notes

Verify the specific datasheet version for the L185XF4W-T suffix to ensure compatibility with wire-bond or surface-mount requirements. Confirm RoHS compliance status through official manufacturer documentation before integration. Cross-reference pinout and footprint dimensions against your PCB layout specifications to prevent mechanical mismatches during assembly.

Selection Notes

Select this component when a sharp cutoff at 18.5 GHz is required for RF suppression. Ensure the design accommodates the 50 Ohm impedance matching network. Consider the thermal performance limits between -55°C and +125°C for environmental suitability. Validate that the insertion loss of 2.2 dB meets the system budget for signal integrity.

Part Context

This part belongs to the Knowles Dielectric Labs RF filter portfolio, specifically categorized under low-pass filters. It is engineered for microwave and millimeter-wave applications where precise frequency rejection is critical. The product line emphasizes high-performance dielectric materials for stable electrical characteristics in demanding RF environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other 18.5 GHz low-pass filters from the same manufacturer family if direct substitution is necessary.