SF2093E 915MHz SAW Filter - Equivalent & Substitute Parts

Part Overview

The SF2093E is a 915MHz Surface Acoustic Wave (SAW) filter manufactured by Murata Electronics, designed for ISM band applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance requirements. The filter provides 2.5dB insertion loss across a 26MHz bandwidth in an 8-SMD, no-lead package format.

Substiute Parts

SF2093E

Murata ElectronicsIn Stock: 783SF2093E Datasheet

Current PartRFQ

B39921B3588U410

Qualcomm (RF front-end (RFFE) filters)In Stock: 5303B39921B3588U410 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SF2093E is determined by the following critical parameters:

• Center Frequency: Must be 915MHz to maintain RF circuit tuning and performance
• Bandwidth: Must be 26MHz to preserve passband characteristics
• Mounting Type: Must be surface mount to ensure PCB compatibility
• Physical Footprint: Must maintain 3.00mm x 3.00mm dimensions for board layout compatibility
• RoHS Compliance: Must meet ROHS3 requirements for regulatory alignment
• Moisture Sensitivity: Must be MSL 1 or equivalent for handling and storage compatibility

The B39921B3588U410 qualifies as a direct substitute based on matching center frequency, bandwidth, physical dimensions, and compliance certifications. Package configuration differences (6-SMD versus 8-SMD) and insertion loss variance are acceptable within engineering tolerances for this application category.

Parameter Comparison

Engineering Selection Recommendations

The B39921B3588U410 is the qualified substitute for the SF2093E based on the following criteria:

Frequency and Bandwidth Alignment: Both components operate at 915MHz with 26MHz bandwidth, ensuring RF circuit performance equivalence.

Compliance and Certifications: The B39921B3588U410 maintains ROHS3 compliance and MSL 1 rating, meeting the same regulatory and handling requirements as the original part.

Product Status: The B39921B3588U410 is classified as active with AEC-Q200 automotive qualification, providing long-term availability and supply chain stability compared to the obsolete SF2093E.

Physical Compatibility: Identical footprint dimensions (3.00mm x 3.00mm) and surface mount configuration ensure PCB layout compatibility without redesign.

Insertion Loss Consideration: The 0.4dB increase in insertion loss (2.9dB versus 2.5dB) falls within acceptable engineering tolerances for ISM band filter applications and does not require circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the B39921B3588U410 be used as a direct replacement for the SF2093E without PCB modifications?

A: Yes. Both components share identical center frequency (915MHz), bandwidth (26MHz), and physical footprint (3.00mm x 3.00mm). The 6-SMD package of the substitute is compatible with standard surface mount assembly processes. PCB layout remains unchanged.

Q: What is the significance of the insertion loss difference between the two parts?

A: The SF2093E specifies 2.5dB insertion loss while the B39921B3588U410 specifies 2.9dB. This 0.4dB variance is within typical engineering tolerances for SAW filter applications and does not require circuit compensation or redesign for ISM band remote control and general RF filtering applications.

Q: Are there any compliance or certification differences between these parts?

A: Both components are ROHS3 compliant with MSL 1 moisture sensitivity rating. The B39921B3588U410 carries additional AEC-Q200 automotive qualification, which provides enhanced reliability documentation but does not restrict use in non-automotive applications.

Q: Why is the SF2093E listed as obsolete?

A: The SF2093E is no longer in active production by Murata Electronics. The B39921B3588U410 from Qualcomm represents the current active alternative for 915MHz SAW filtering in this package category.

Q: Does the package change from 8-SMD to 6-SMD affect assembly compatibility?

A: No. Both packages are surface mount, no-lead configurations with identical footprint dimensions. Standard pick-and-place assembly equipment handles both package types without modification. Solder reflow profiles remain equivalent.