RF1400D Equivalent & Substitute Parts

Part Overview

The RF1400D is a 433.92MHz Surface Acoustic Wave (SAW) filter manufactured by Murata Electronics, designed for wide channel applications in RF front-end circuits. This component operates at a center frequency of 433.92MHz with a 1.15MHz bandwidth and 2dB insertion loss in an 8-SMD, no-lead surface mount package.

The RF1400D is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

RF1400D

Murata ElectronicsIn Stock: 1962RF1400D Datasheet

Current PartRFQ

B39431B3790Z810

Qualcomm (RF front-end (RFFE) filters)In Stock: 1488B39431B3790Z810 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RF1400D are identified based on the following critical parameters that determine functional and mechanical compatibility:

• Center Frequency Match: 433.92MHz (exact match required for RF tuning)
• Package Compatibility: 8-SMD, no-lead surface mount package with matching footprint dimensions (0.150" x 0.150")
• Physical Fit: Maximum height and overall dimensions must accommodate existing PCB layouts
• Environmental Compliance: RoHS3 compliance and MSL rating for manufacturing process compatibility
• Electrical Performance: Insertion loss and bandwidth characteristics must be suitable for the application

The B39431B3790Z810 meets these core substitution criteria while maintaining the same center frequency, package type, and physical footprint as the RF1400D.

Parameter Comparison

Engineering Selection Recommendations

The B39431B3790Z810 is the manufacturer-recommended substitute for the RF1400D. Both components share identical center frequency (433.92MHz) and package footprint (0.150" x 0.150" 8-SMD, no-lead), enabling direct PCB layout compatibility.

The B39431B3790Z810 carries active product status and AEC-Q200 automotive qualification, providing supply chain continuity and enhanced reliability assurance compared to the obsolete RF1400D. Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing processes.

The B39431B3790Z810 exhibits a narrower bandwidth (120kHz versus 1.15MHz) and higher insertion loss (3.6dB versus 2dB). These electrical differences reflect application-specific design: the RF1400D targets wide channel applications while the B39431B3790Z810 is optimized for remote control applications. Circuit-level performance validation is required to confirm suitability for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the B39431B3790Z810 be used as a direct replacement for the RF1400D?

A: Both parts share the same center frequency (433.92MHz), package type (8-SMD, no-lead), and physical footprint (0.150" x 0.150"). PCB layout compatibility is maintained. However, the B39431B3790Z810 has narrower bandwidth (120kHz) and higher insertion loss (3.6dB) compared to the RF1400D (1.15MHz bandwidth, 2dB insertion loss). Application-specific circuit performance must be validated.

Q: What are the physical compatibility considerations?

A: Both parts use identical footprint dimensions (0.150" L x 0.150" W). The B39431B3790Z810 has a maximum height of 0.059" (1.50mm) versus the RF1400D at 0.055" (1.40mm). This 0.004" height difference is within typical PCB assembly tolerances but should be verified for space-constrained designs.

Q: Are both parts RoHS compliant?

A: Yes. Both the RF1400D and B39431B3790Z810 are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard surface mount assembly processes.

Q: What is the difference in bandwidth and insertion loss between these parts?

A: The RF1400D provides 1.15MHz bandwidth with 2dB insertion loss for wide channel applications. The B39431B3790Z810 provides 120kHz bandwidth with 3.6dB insertion loss, optimized for remote control applications. The narrower bandwidth and higher insertion loss of the B39431B3790Z810 reflect different application requirements and must be evaluated against circuit specifications.

Q: Does the B39431B3790Z810 have additional certifications?

A: Yes. The B39431B3790Z810 carries AEC-Q200 automotive qualification, providing enhanced reliability assurance. The RF1400D does not list specific certifications in the provided data.