M3933/30-17S Replacement: SA26B-08, FMAT7466-8

Original Part

M3933/30-17S

Amphenol SV Microwave

RF Attenuators 8dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

SA26B-08

Fairview Microwave

RF Attenuators 8dB 0 Hz ~ 26 GHz 50 Ohms 2W SMA In-Line Module

FMAT7466-8

Fairview Microwave

RF Attenuators 8dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

1. SA26B-08 Substitution Conclusion The SA26B-08 can serve as a limited substitute for the original component, subject to key constraints. The primary difference lies in the frequency range (0 Hz–26 GHz versus the original part’s 32 GHz). Beyond 26 GHz up to 32 GHz, this device cannot guarantee specified attenuation performance or impedance matching, potentially leading to increased insertion loss and degraded return loss. Therefore, it is only suitable for systems operating at or below 26 GHz. Provided the actual application frequency remains under 26 GHz, core parameters such as attenuation value, power handling, and connector interface are directly compatible.

2. FMAT7466-8 Substitution Conclusion The FMAT7466-8 is not recommended as a direct replacement for the original part, except in very low-frequency systems. Its frequency range is limited to 0 Hz–12 GHz, a significant reduction compared to the original part’s 32 GHz. Above 12 GHz, attenuation accuracy and impedance consistency degrade noticeably, which can lead to increased signal distortion or higher reflection, making it unsuitable for broadband or high-frequency applications. Substitution should only be considered if the operating band is entirely below 12 GHz and both power rating and interface type are matched; otherwise, system performance may be compromised.

Analysis ID: 655D-CFF7000

Based on part parameters and for reference only. Not to be used for procurement or production.