CFUKF455KB4X-R0

Overview

The CFUKF455KB4X-R0 is a ceramic bandpass filter from the Murata CERAFIL CFU series, designed for signal conditioning applications. It operates at a center frequency of 455.0 kHz with a nominal impedance of 1 kOhm. The component features a four-element internal structure and offers a center frequency tolerance of ±1.5 kHz. Key electrical specifications include a minimum 6dB bandwidth of fn±15.0 kHz and a stopband bandwidth of 35 kHz within 40 dB attenuation. It supports board mounting and functions within an operating temperature range of -20°C to +80°C.

Feature Summary

• Four-element ceramic construction for precise signal filtering
• High selectivity with defined stopband attenuation characteristics
• Compact surface-mount design suitable for automated assembly

Applications

• Aircraft equipment
• Aerospace equipment
• Undersea equipment
• Power plant control equipment
• Medical equipment

Procurement Notes

Verify current availability status as the component lifecycle may be discontinued or limited. Confirm RoHS and REACH compliance details through official manufacturer documentation before integration. Ensure storage conditions account for humidity sensitivity ratings specified in the datasheet to maintain component integrity during handling and assembly processes.

Selection Notes

Select this component when a 1 kOhm impedance interface is required for 455 kHz intermediate frequency stages. The CFU series provides specific bandwidth constraints that differ from standard low-impedance filters. Evaluate thermal performance against the -20°C to +80°C operational limit to ensure reliability in the target environment without requiring additional cooling measures.

Part Context

This part belongs to the CERAFIL CFU family of ceramic filters manufactured by Murata Electronics. These components are engineered for high-reliability environments where stable frequency response is critical. The CFU series typically utilizes monolithic ceramic technology to achieve compact form factors while maintaining strict tolerance standards for industrial and specialized electronic systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify compatibility with existing circuit designs if considering alternative models from the same manufacturer or other suppliers offering similar 455 kHz ceramic filters.