SF2059B-1

Overview

The SF2059B-1 is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates at a center frequency of 137.5 MHz with a bandwidth of approximately 0.86 to 1.8 MHz. The device features low insertion loss, typically around 9.1 dB, and maintains a 50 Ohm impedance. It is housed in a compact SMP-03 surface-mount package measuring 5.0 x 7.0 mm. Designed for signal conditioning, it complies with RoHS directives and supports board mounting applications.

Feature Summary

• Low insertion loss design for efficient signal transmission
• Compact surface-mount case suitable for space-constrained layouts
• RoHS compliant construction for environmental safety

Applications

• Embedded systems requiring precise frequency selection
• Industrial automation signal processing
• General electronics filtering applications

Procurement Notes

Verify the specific datasheet version to confirm exact bandwidth and insertion loss values, as sources vary between 0.86 MHz and 1.8 MHz bandwidth. Ensure the SMP-03 package dimensions match your PCB footprint requirements. Confirm RoHS compliance status directly with the manufacturer or authorized distributor before finalizing procurement specifications.

Selection Notes

Select this component when a narrowband SAW filter is required at 137.5 MHz with minimal signal attenuation. The 50 Ohm impedance matches standard RF circuits. Consider the physical size constraints due to the 5.0 x 7.0 mm package. Verify thermal operating ranges if deployed in extreme environments, as specific temperature limits may require datasheet confirmation.

Part Context

This part belongs to the RFMi SAW filter family, designed for high-performance signal conditioning. It serves as a specialized component for filtering specific frequency bands in radio frequency and communication circuits. The series emphasizes reliability and compliance with international environmental standards for modern electronic manufacturing.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Cross-referencing requires matching center frequency, bandwidth, impedance, and package type from official manufacturer lists.