SCLF-21.4+

Overview

The SCLF-21.4+ is a lumped LC low-pass filter manufactured by Mini-Circuits, designed for signal conditioning applications in the radio frequency spectrum. It operates within a frequency range of 0 Hz to 22 MHz and features a nominal impedance of 50 Ohms. The component utilizes an 8-SMD, flat lead surface-mount package style, designated as YY161. Key electrical specifications include a rejection of 20 dB at frequencies between 32.0 MHz and 41.0 MHz, a maximum power handling capacity of 0.5 W, and a Voltage Standing Wave Ratio (VSWR) of 1.7:1. This configuration ensures effective attenuation of high-frequency signals while maintaining signal integrity within the passband.

Feature Summary

• Lumped LC architecture providing compact low-pass filtering capabilities
• Surface-mount design with flat leads for automated PCB assembly
• High rejection characteristics above the cutoff frequency range

Applications

• RF signal conditioning circuits
• IF stage filtering in communication systems
• Harmonic suppression in RF transmitters

Procurement Notes

Verify the specific datasheet version from Mini-Circuits or authorized distributors to confirm current electrical tolerances and RoHS compliance status. Ensure the ordering suffix matches the required packaging format, such as tape and reel options if available. Cross-reference the part number with official manufacturer documentation to validate performance data against your specific application requirements before procurement.

Selection Notes

Select this component when a low-pass filter with a cutoff near 22 MHz is required for 50-Ohm systems. Consider the 0.5 W power rating and 1.7:1 VSWR limits during system design. The 8-SMD flat lead package is suitable for space-constrained designs requiring surface-mount technology integration without compromising RF performance in the specified frequency band.

Part Context

This component belongs to the SCLF series of lumped element low-pass filters from Mini-Circuits. These components are engineered for use in RF and IF applications ranging from DC to microwave frequencies. The SCLF-21.4+ specifically targets lower frequency bands, offering a balance between size, performance, and ease of integration into modern electronic devices requiring precise signal filtering.

Replacement Considerations

Consult Mini-Circuits official substitution guides for verified alternatives. No direct public substitute part numbers are confirmed in the provided source material.