RF1391C-1

Overview

The RF1391C-1 is a Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi. It operates at a center frequency of 433.42 MHz with a bandwidth of 600 kHz, covering a range from 433.3 MHz to 433.62 MHz. The component features an insertion loss of 5 dB and an impedance of 212 Ohms. It is rated for 12 V and functions within a temperature range of -40°C to +85°C. The device utilizes SMD/SMT termination in an SM-5050-8 package and holds AEC-Q200 qualification.

Feature Summary

• Utilizes coupled-resonator technology with selective null placement for interference suppression
• Provides high attenuation typically exceeding 40 dB for local oscillator and image frequencies
• Designed for surface mount assembly in compact footprints

Applications

• Remote control systems operating in the 433 MHz ISM band
• Wireless communication modules requiring signal conditioning
• Internet-connected OEM devices needing reliable RF filtering

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as RF1391C may exist. Confirm that the required insertion loss specification aligns with the 5 dB rating provided in official documentation. Ensure compatibility with the SM-5050-8 footprint during PCB layout. Check for AEC-Q200 certification requirements if automotive applications are intended. Validate voltage ratings against system constraints before integration.

Selection Notes

Select this component for applications requiring precise filtering at 433.42 MHz with minimal size. The 212 Ohm impedance must match the source and load circuits to minimize reflection. Consider the 5 dB insertion loss impact on overall link budget. The wide operating temperature range supports diverse environmental conditions. Ensure the board space accommodates the 5.00mm x 5.00mm package dimensions.

Part Context

This part belongs to the RFMi SAW filter series, designed for signal conditioning in wireless electronics. It addresses the need for compact, high-performance filters in IoT and remote control devices. The manufacturer focuses on enabling connectivity through integrated RF components. This specific model targets the global 433 MHz industrial, scientific, and medical frequency band.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications carefully when considering alternative SAW filters from other manufacturers.