SF1146B

Overview

The SF1146B is a Surface Acoustic Wave (SAW) filter manufactured by Murata Electronics, designed for signal conditioning applications. It operates at a center frequency of 499.25 MHz with a bandwidth of 30 kHz. The component features a nominal impedance of 50 ohms and exhibits an insertion loss of 3.5 dB. It is housed in a compact 10-SMD package, suitable for board mounting in RF circuits requiring precise frequency selection.

Feature Summary

• Utilizes Surface Acoustic Wave technology for high-frequency signal filtering
• Provides precise bandpass characteristics centered at 499.25 MHz
• Designed for low insertion loss performance in RF signal paths

Applications

• Digital cable receiver front-ends
• RF signal conditioning modules
• Frequency-selective filtering in communication equipment

Procurement Notes

Verify the specific package variant and manufacturing date code against current Murata Electronics documentation before procurement. Confirm that the 10-SMD footprint matches the target PCB layout requirements. Ensure compatibility with the intended operating temperature range and signal integrity specifications for the final assembly process.

Selection Notes

Select this component when a narrow 30 kHz bandwidth is required at approximately 500 MHz. The 50-ohm impedance rating ensures proper matching in standard RF systems. Consider the 10-SMD form factor for space-constrained designs where surface mount assembly is preferred over through-hole technologies.

Part Context

This part belongs to Murata's SAW filter portfolio, which specializes in passive components for radio frequency applications. These filters are engineered to provide sharp cutoff characteristics and stable performance across varying environmental conditions, supporting reliable operation in consumer electronics and industrial communication devices.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify electrical equivalence and pinout compatibility if considering alternative suppliers or updated series from Murata.