KNF21050-W3

Overview

The KYOCERA AVX KNF21050-W3 is a surface-mount LC low-pass EMI/RFI filter designed for signal integrity management. It features a cutoff frequency of 50 MHz and utilizes an LC technology architecture. The component is housed in a compact 0805 (2012 Metric) package with a 3-pad configuration, facilitating automated assembly. Rated at 25 V DC, this device integrates internal capacitance to attenuate high-frequency noise on data lines. It complies with RoHS standards and is marked as obsolete by the manufacturer.

Feature Summary

• Integrates LC filtering topology within a single surface-mount package
• Provides low-pass attenuation characteristics for high-frequency noise suppression
• Designed for compact board layouts using a 0805 footprint

Applications

• Data line protection in mobile devices
• High-speed digital signal filtering
• EMI suppression in consumer electronics

Procurement Notes

Verify current availability status as the part is officially listed as obsolete. Confirm compatibility with existing PCB footprints if sourcing from secondary markets. Ensure that alternative components meet the required 50 MHz cutoff specification and 0805 package dimensions for direct replacement in legacy designs.

Selection Notes

Select this component for applications requiring integrated LC filtering in space-constrained environments. The 0805 package offers a balance between performance and board area. Consider the 50 MHz cutoff frequency when designing for specific data rates. Verify voltage ratings against circuit operating conditions to ensure reliable operation within the 25 V DC limit.

Part Context

This component belongs to the KNF series of EMI/RFI filters manufactured by KYOCERA AVX. The series focuses on providing passive filtering solutions for high-speed digital interfaces. The KNF21050-W3 specifically addresses noise reduction requirements in portable and mobile electronic systems where size and weight are critical constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available due to the obsolete status of this specific model. Engineers should evaluate equivalent LC filters from other manufacturers that match the 0805 package, 50 MHz cutoff frequency, and 25 V rating. Cross-referencing pinout and electrical characteristics is essential for functional equivalence.