B39451B3554U310 Equivalent & Substitute Parts

Part Overview

The B39451B3554U310 is a 447.725MHz Surface Acoustic Wave (SAW) filter manufactured by Qualcomm for RF front-end (RFFE) applications in remote control systems. This component features an 8-SMD, No Lead package with 2.2dB insertion loss and operates with unlimited moisture sensitivity rating (MSL 1).

The B39451B3554U310 is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, maintenance operations, and system redesigns where this component is specified in existing designs.

Substiute Parts

B39451B3554U310

Qualcomm (RF front-end (RFFE) filters)In Stock: 862B39451B3554U310 Datasheet

Current PartRFQ

B39451B3907U410

Qualcomm (RF front-end (RFFE) filters)In Stock: 769B39451B3907U410 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B39451B3554U310 is determined by the following critical parameters:

Frequency Compatibility: Center frequency must operate within the 447MHz band to maintain RF performance in remote control applications. The substitute part B39451B3907U410 operates at 447.7MHz, which is within acceptable tolerance of the original 447.725MHz specification.

Package and Mounting: Surface mount package type and form factor must be compatible with existing PCB layouts. The B39451B3554U310 uses an 8-SMD, No Lead package measuring 5.00mm x 5.00mm. The substitute uses a 6-SMD, No Lead package measuring 3.00mm x 3.00mm, representing a smaller footprint.

Electrical Performance: Insertion loss and bandwidth parameters define filter performance. The original part specifies 2.2dB insertion loss with unspecified bandwidth. The substitute specifies 3dB insertion loss with 1.6MHz bandwidth.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards.

Product Status: The original part is obsolete; the substitute is active production, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement: The B39451B3907U410 is the designated substitute for the B39451B3554U310. Both components are manufactured by Qualcomm and maintain identical regulatory compliance profiles (ROHS3, REACH Unaffected, MSL 1).

Frequency Band Alignment: Both parts operate within the 447MHz remote control frequency band. The 25kHz difference between 447.725MHz and 447.7MHz is within typical RF filter tolerance specifications for this application class.

Package Footprint Consideration: The substitute part uses a smaller 6-SMD package (3.00mm x 3.00mm) compared to the original 8-SMD package (5.00mm x 5.00mm). PCB layout redesign is required to accommodate this dimensional change.

Electrical Performance Trade-off: The substitute part exhibits 0.8dB higher insertion loss (3dB versus 2.2dB). System-level RF performance analysis is necessary to determine if this increase is acceptable within the remote control receiver design margin.

Active Production Status: The B39451B3907U410 is in active production with established supply chain availability, eliminating long-term obsolescence risk associated with the original part.

Frequently Asked Questions (FAQ)

Q: Can the B39451B3907U410 be used as a direct drop-in replacement for the B39451B3554U310?

A: No. While both parts operate at compatible frequencies for remote control applications, the substitute uses a different package type (6-SMD versus 8-SMD) and smaller footprint (3.00mm x 3.00mm versus 5.00mm x 5.00mm). PCB layout modification is required.

Q: What is the frequency tolerance between the original and substitute parts?

A: The original part operates at 447.725MHz and the substitute at 447.7MHz, representing a 25kHz difference. Both operate within the 447MHz remote control band.

Q: Does the higher insertion loss of the substitute part affect system performance?

A: The substitute part specifies 3dB insertion loss compared to 2.2dB for the original. The 0.8dB increase must be evaluated within the complete RF receiver design to determine system-level impact on sensitivity and performance margins.

Q: Are both parts compliant with current environmental and regulatory standards?

A: Yes. Both the B39451B3554U310 and B39451B3907U410 are ROHS3 compliant, REACH Unaffected, and carry MSL 1 (unlimited moisture sensitivity) ratings.

Q: What is the availability difference between these parts?

A: The B39451B3554U310 is obsolete. The B39451B3907U410 is in active production and available in Tape & Reel packaging, ensuring long-term supply chain continuity.

Q: Are there any AEC-Q200 rating differences?

A: The substitute part B39451B3907U410 carries AEC-Q200 automotive qualification. The original part does not list this rating in the provided specifications.