RF3181D

Overview

The Murata Electronics RF3181D is a Surface Acoustic Wave (SAW) filter designed for meter reading applications. It operates at a center frequency of 916.5 MHz with a bandwidth of 600 kHz. The component features an insertion loss of 2.5 dB and supports voltage ratings up to 12 V. Impedance values are specified as 37 Ohms and 25 Ohms. It utilizes an 8-SMD, No Lead package with dimensions of 0.055 inches (1.40 mm) in maximum height.

Feature Summary

• Provides front-end selectivity for narrowband receiver applications
• Designed for low-loss signal filtering in compact form factors
• Optimized for economical implementation in meter reading systems

Applications

• Meter Reading
• Narrowband Receiver Front Ends

Procurement Notes

Verify the specific manufacturer designation, as sources list both Murata Electronics and RFMi for this part number. Confirm the package type, as documentation varies between 6-SMD and 8-SMD configurations. Check current availability status, as some listings indicate end-of-life or discontinuation. Ensure compliance with RoHS3 standards if required by your design specifications.

Selection Notes

Select this component for applications requiring precise 916.5 MHz filtering with minimal insertion loss. Consider the 600 kHz bandwidth for narrowband signal integrity. Evaluate the 8-SMD footprint against board space constraints. Verify impedance matching requirements for the 37 Ohm and 25 Ohm specifications within the circuit design.

Part Context

This SAW filter belongs to the RF series, specifically engineered for radio frequency signal conditioning. It serves as a critical component for maintaining signal clarity in receivers operating at 916.5 MHz. The technology leverages surface acoustic waves to achieve high performance in a small surface-mount package suitable for automated assembly.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.