RF3404D Equivalent & Substitute Parts

Part Overview

The RF3404D is a 433.92MHz Surface Acoustic Wave (SAW) filter manufactured by Murata Electronics, designed for remote control applications. This component provides 1.6dB insertion loss with a 600kHz bandwidth in an 8-SMD, no-lead surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

RF3404D

Murata ElectronicsIn Stock: 1090RF3404D Datasheet

Current PartRFQ

B39431B3760Z810

Qualcomm (RF front-end (RFFE) filters)In Stock: 16588B39431B3760Z810 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RF3404D is determined by the following critical parameters:

• Center Frequency: Must be 433.92MHz to maintain RF tuning and system compatibility
• Package Type & Dimensions: Must be 8-SMD, no-lead with 3.80mm x 3.80mm footprint to ensure PCB layout compatibility
• Mounting Type: Surface mount requirement is non-negotiable for assembly process compatibility
• Compliance Standards: AEC-Q200 certification ensures automotive-grade reliability; ROHS3 compliance is mandatory for regulatory adherence
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates no special storage or handling requirements

The B39431B3760Z810 from Qualcomm meets all mandatory substitution criteria. While bandwidth and insertion loss differ from the original part, these parameters remain within acceptable tolerances for remote control filter applications and do not prevent functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The B39431B3760Z810 is the qualified substitute for the RF3404D based on the following factors:

• Frequency Alignment: Both parts operate at 433.92MHz, ensuring RF circuit compatibility without redesign
• Package Compatibility: Identical 8-SMD, no-lead footprint (3.80mm x 3.80mm) permits direct PCB layout reuse
• Compliance Certification: Both parts carry AEC-Q200 and ROHS3 certifications, meeting automotive and environmental regulatory requirements
• Product Availability: The B39431B3760Z810 is in active production status with substantial inventory (16,509 pcs), ensuring long-term supply chain stability
• Handling Requirements: Identical MSL 1 classification eliminates changes to component storage, handling, or assembly procedures

The B39431B3760Z810 is suitable for direct replacement in existing RF3404D applications.

Frequently Asked Questions (FAQ)

Q: Can the B39431B3760Z810 be used as a direct drop-in replacement for the RF3404D?

A: Yes. Both parts share identical center frequency (433.92MHz), package type (8-SMD, no-lead), and footprint dimensions (3.80mm x 3.80mm). No PCB layout modifications are required.

Q: What is the significance of the bandwidth difference (600kHz vs. 360kHz)?

A: The B39431B3760Z810 has a narrower bandwidth specification. This parameter is determined by the SAW filter design and does not prevent functional equivalence in remote control applications where both bandwidth values are acceptable for the intended frequency band.

Q: Does the insertion loss difference (1.6dB vs. 1.9dB) affect system performance?

A: The insertion loss difference of 0.3dB is within typical design margins for remote control RF front-end circuits. System-level performance validation is the responsibility of the design engineer.

Q: Are there any height clearance concerns with the B39431B3760Z810?

A: The B39431B3760Z810 has a maximum height of 0.059" (1.50mm) compared to the RF3404D at 0.055" (1.40mm). The 0.004" (0.10mm) difference is negligible for standard PCB assembly and should not create clearance issues in typical remote control module designs.

Q: What is the packaging difference between the two parts?

A: The RF3404D is supplied in standard packaging, while the B39431B3760Z810 is supplied in Tape & Reel (TR) format. Both are suitable for automated assembly processes; TR packaging is standard for high-volume production.

Q: Are both parts compliant with automotive standards?

A: Yes. Both the RF3404D and B39431B3760Z810 carry AEC-Q200 certification and ROHS3 compliance, meeting automotive-grade reliability and environmental requirements.