ZXLF-K123+

Overview

The ZXLF-K123+ is a reflectionless low-pass filter from Mini-Circuits, operating from DC to 12000 MHz. It features a 50 Ohm impedance and utilizes a 2.92mm termination interface. The device employs a novel topology that absorbs stop-band signals internally, eliminating the need for external terminations. This design ensures stable performance in systems where load mismatches are common.

Feature Summary

• Reflectionless topology that absorbs stop-band energy internally
• Wideband operation from DC to 12 GHz
• Standard 50 Ohm impedance matching
• Robust 2.92mm connector interface

Applications

• Signal conditioning in RF test and measurement equipment
• Harmonic suppression in microwave transmission systems
• Interstage filtering in broadband amplifier chains

Procurement Notes

Verify the specific suffix designation against official Mini-Circuits documentation to confirm exact electrical tolerances and mechanical variations. Ensure compatibility with 2.92mm mating interfaces. Confirm RoHS compliance status through current manufacturer datasheets prior to integration into regulated assemblies.

Selection Notes

Select this component when internal termination of reflected high-frequency energy is required to prevent system instability. The reflectionless design simplifies circuit layout by removing the need for additional matched loads. Verify that the 12 GHz cutoff frequency aligns with the specific signal bandwidth requirements of the application.

Part Context

This part belongs to the ZXLF series of reflectionless filters. Unlike traditional filters that reflect out-of-band signals, this series terminates them internally. This family is designed for applications requiring high isolation and stability under varying load conditions across wide frequency ranges.

Replacement Considerations

Consult Mini-Circuits official substitution guides for direct equivalents. Generic low-pass filters do not replicate the internal absorption topology. Verify that any substitute maintains the 2.92mm interface and 50 Ohm impedance to ensure mechanical and electrical continuity.