ZXLF-K421+

Overview

The Mini-Circuits ZXLF-K421+ is a reflectionless low-pass RF filter designed for frequencies from DC to 420 MHz. It features a stopband extending from 900 MHz to 18 GHz, providing significant signal attenuation in the upper range. The device operates at a standard 50-ohm impedance and utilizes 2.92mm termination interfaces. Electrical specifications include an insertion loss ranging between 1.5 dB and 3 dB across the passband. This component is engineered to minimize signal reflections inherent in traditional filter designs, ensuring stable performance in sensitive RF applications.

Feature Summary

• Reflectionless design architecture reduces signal reflection losses compared to conventional filters
• Wide stopband suppression capability extending up to 18 GHz
• Standard 50-ohm impedance matching for seamless system integration

Applications

• Aerospace and defense systems
• Military radio communications
• Wireless communication infrastructure
• Test and measurement equipment

Procurement Notes

Verify the specific datasheet revision and manufacturing date code upon order confirmation. Ensure that the 2.92mm connector interface matches your existing test fixtures or cable assemblies. Confirm RoHS and REACH compliance status if required by your procurement standards. Cross-reference the part number suffix to ensure no functional variations exist in the supplied unit.

Selection Notes

Select this component when operating within the DC to 420 MHz frequency range requires minimal passband ripple and low insertion loss. The reflectionless topology makes it suitable for applications where signal integrity is critical and reflected energy could destabilize upstream sources. Consider the 2.92mm termination size for physical compatibility with high-frequency interconnects.

Part Context

This component belongs to Mini-Circuits' ZXLF series of reflectionless filters, which utilize unique internal architectures to absorb reflected energy rather than reflecting it back into the circuit. The brand is a global leader in RF, IF, and microwave components, offering solutions from DC to 86 GHz for various industrial and commercial sectors.

Replacement Considerations

Direct substitutes are not explicitly listed in public documentation. Evaluate other ZXLF series models for different cutoff frequencies or impedance values if the electrical specifications do not align with the new design requirements.