SF1192B Equivalent & Substitute Parts

Part Overview

The SF1192B is a 1.843GHz Surface Acoustic Wave (SAW) filter manufactured by Murata Electronics, designed for cell phone RF applications. This component features a 75MHz bandwidth with 2.2dB insertion loss in a 6-SMD, no-lead surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

SF1192B

Murata ElectronicsIn Stock: 1725SF1192B Datasheet

Current PartRFQ

AFS1842.5S4

Abracon LLCIn Stock: 2983AFS1842.5S4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for SAW filters is determined by strict alignment of electrical and mechanical parameters. The primary criteria are:

• Center frequency match: 1.843GHz
• Bandwidth specification: 75MHz
• Package configuration: 6-SMD, no-lead form factor
• Physical dimensions: 0.118" L x 0.118" W (3.00mm x 3.00mm)
• Surface mount compatibility

The AFS1842.5S4 from Abracon LLC meets all mechanical and electrical frequency requirements. Insertion loss differs between the main part (2.2dB) and the substitute (3dB), representing a measurable but acceptable variance within typical RF filter performance tolerances for cell phone applications.

Parameter Comparison

Engineering Selection Recommendations

The AFS1842.5S4 is the qualified substitute for the obsolete SF1192B. Both components share identical center frequency (1.843GHz), bandwidth (75MHz), package configuration (6-SMD, no-lead), and physical footprint (3.00mm x 3.00mm). Both are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).

The AFS1842.5S4 maintains active product status with current manufacturing availability, addressing the obsolescence constraint of the SF1192B. The insertion loss differential (3dB versus 2.2dB) represents the primary electrical variance and must be evaluated within the context of system-level RF performance requirements.

Height variance (0.059" maximum for AFS1842.5S4 versus 0.054" for SF1192B) is within typical PCB assembly tolerances for surface mount components and does not present mechanical compatibility issues.

Frequently Asked Questions (FAQ)

Q: Can the AFS1842.5S4 be used as a direct replacement for the SF1192B?

A: Yes, the AFS1842.5S4 is mechanically and electrically compatible. Both components operate at 1.843GHz with 75MHz bandwidth in identical 6-SMD, no-lead packages with matching 3.00mm x 3.00mm footprints. The insertion loss difference (3dB versus 2.2dB) must be evaluated within your system's RF performance specifications.

Q: What is the significance of the insertion loss difference?

A: Insertion loss represents signal attenuation through the filter. The SF1192B specifies 2.2dB while the AFS1842.5S4 specifies 3dB. This 0.8dB difference is measurable and should be factored into link budget calculations for RF systems operating near sensitivity thresholds.

Q: Are there height clearance concerns with the AFS1842.5S4?

A: The AFS1842.5S4 maximum height is 0.059" (1.50mm) compared to the SF1192B at 0.054" (1.38mm). This 0.005" difference is negligible for standard PCB assembly and does not present clearance issues in typical cell phone RF module designs.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the SF1192B and AFS1842.5S4 are ROHS3 compliant with MSL rating of 1 (unlimited). Both carry EAR99 ECCN classification and identical HTSUS codes (8541.60.0080).

Q: What is the packaging difference between these parts?

A: The SF1192B is listed with standard packaging notation, while the AFS1842.5S4 is supplied in Tape & Reel (TR) format. Both are surface mount compatible with identical land patterns and solder reflow requirements.