SF1143B-4

Overview

The RFMi SF1143B-4 is a Surface Acoustic Wave (SAW) bandpass filter designed for signal conditioning applications. It operates at a center frequency of 315 MHz with a bandwidth of 14.1 MHz and an insertion loss of 15.1 dB. The component features a 250 Ohm impedance rating and supports a maximum voltage of 30V. It is housed in a compact SMP-03 package, measuring 7.0mm x 5.0mm x 1.65mm, and utilizes a 12-SMD, no-lead surface mount configuration.

Feature Summary

• Surface Acoustic Wave technology for efficient signal filtering
• Bandpass design optimized for specific frequency selection
• Compact SMD package suitable for space-constrained layouts

Applications

• RF SAW Filter applications
• Signal Conditioning circuits
• IF Frequency processing

Procurement Notes

Verify the manufacturer designation, as sources indicate both RFMi and Akoustis- RFMi branding. Confirm the exact package type (SMP-03) and pin count (12-SMD) against the official datasheet to ensure compatibility with your PCB footprint. Check RoHS compliance status before finalizing procurement decisions.

Selection Notes

Select this component when a 315 MHz center frequency and 14.1 MHz bandwidth are required. Ensure the system can accommodate a 15.1 dB insertion loss. The 30V rating must align with circuit voltage limits. Verify that the 250 Ohm impedance matches the source and load requirements of the application.

Part Context

This part belongs to the SAW filter category from RFMi. It is distinct from similar models like the SF1143B-1 by its specific packaging and electrical characteristics. The SMP-03 form factor differentiates it from other surface mount filters in the manufacturer's lineup.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer for direct equivalents or cross-reference based on strict electrical parameter matching.