SF2148B

Overview

The Murata Electronics SF2148B is a Surface Acoustic Wave (SAW) filter designed for RF signal conditioning. It operates at a center frequency of 138.24 MHz with a bandwidth of 20 MHz and an insertion loss of 10.5 dB. The component utilizes a 12-SMD, no-lead surface mount package measuring 7.00 mm x 5.00 mm x 2.00 mm. It is qualified to AEC-Q200 standards and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Surface Acoustic Wave technology for precise RF filtering
• Automotive-grade qualification ensuring reliability in harsh environments
• Compact surface-mount footprint for space-constrained PCB layouts

Applications

• Cellular communication systems
• SCDMA RF front-end modules

Procurement Notes

Verify the current product status as obsolete or end-of-life before design finalization. Confirm availability through authorized distributors or secondary markets if immediate procurement is required. Ensure the specific package variant matches the target PCB footprint requirements during sourcing.

Selection Notes

Select this component for applications requiring a 138.24 MHz center frequency with a 20 MHz passband. The 10.5 dB insertion loss must be accounted for in link budget calculations. Verify that the 12-SMD package dimensions fit the designated board area and that thermal conditions remain within the specified operating range.

Part Context

This part belongs to the Murata SAW filter family, specifically engineered for radio frequency applications. It serves as a bandpass filter to isolate desired signals from noise and interference in wireless transceivers. The SF series typically targets mobile and automotive electronics requiring stable frequency response.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Murata's official cross-reference tools or engineering support for compatible alternatives.