B39431B3557U310

Overview

The B39431B3557U310 is an obsolete Surface Acoustic Wave (SAW) filter manufactured by Qualcomm. It operates at a center frequency of 434.42MHz with a bandwidth of 2dB. The component is housed in an 8-SMD, no-lead package measuring 5.00mm x 5.00mm x 1.35mm maximum height. Designed for remote control applications, it features low insertion loss characteristics typical of SAW technology. The device complies with RoHS3 standards and has a Moisture Sensitivity Level (MSL) rating of 1.

Feature Summary

• Utilizes Surface Acoustic Wave (SAW) technology for signal filtering
• Optimized for remote control RF applications
• Compact surface-mount design suitable for space-constrained layouts

Applications

• Remote control systems
• RF front-end modules
• Wireless communication devices

Procurement Notes

This component is officially classified as obsolete and no longer in production. Verification of availability should focus on surplus or secondary market sources rather than direct manufacturer distribution. Buyers must confirm the authenticity of stock from non-authorized distributors due to the discontinued status. Ensure that any acquired units match the original specifications and packaging requirements for integration into existing designs.

Selection Notes

Engineers replacing this part should note its specific 434.42MHz center frequency and 2dB bandwidth constraints. Since the part is obsolete, alternative selection requires identifying components with identical electrical parameters and compatible 8-SMD footprints. Compatibility checks must verify that substitute filters maintain similar insertion loss and form factor to ensure seamless integration without PCB redesign.

Part Context

The B39431 series represents Qualcomm's portfolio of RF front-end filters designed for mobile and wireless applications. This specific model belongs to the SAW filter category, which is known for cost-effectiveness and performance in specific frequency bands. The series supports various remote control and ISM band applications, providing essential signal integrity for RF transceivers in consumer electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, engineers must perform rigorous parameter matching when selecting third-party alternatives.