SA26B-01 Replacement: M3933/30-03S, FMAT7466-1

Original Part

SA26B-01

Fairview Microwave

RF Attenuators 1dB 0 Hz ~ 26 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

M3933/30-03S

Amphenol SV Microwave

RF Attenuators 1dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

FMAT7466-1

Fairview Microwave

RF Attenuators 1dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

1. M3933/30-03S Substitution Conclusion The M3933/30-03S is identical to the original part SA26B-01 in attenuation (1 dB), power rating (2 W), impedance (50 Ω), and package (SMA In-Line Module). However, it offers a wider frequency range (0–32 GHz vs. 0–26 GHz) and maintains stable performance up to 32 GHz. Its electrical characteristics fully cover and exceed those of the original part, making it a suitable drop‑in replacement, particularly for high‑frequency applications or future system upgrades. Note that the manufacturer differs (Amphenol SV Microwave vs. Fairview Microwave), which may introduce minor variations in connector details, mechanical tolerances, or quality standards. It is recommended to verify the connector gender (e.g., compatibility with PLUG‑JACK configurations) and physical fit prior to substitution to ensure seamless integration without compromising system performance.

2. FMAT7466-1 Substitution Conclusion The FMAT7466-1 matches the original SA26B-01 in attenuation (1 dB), power rating (2 W), and impedance (50 Ω). However, its frequency range is significantly narrower (0–12 GHz vs. 0–26 GHz). It is only suitable for applications below 12 GHz; if the original system operates above 12 GHz (e.g., up to 26 GHz), substitution will result in degraded attenuation performance or failure, making it unsuitable for high‑frequency scenarios. Additionally, the described connector configuration is JACK‑PLUG, which may be reversed compared to the original PLUG‑JACK arrangement. This could cause physical mating incompatibility, requiring additional adapters or rerouting, thereby increasing system complexity and introducing potential impedance mismatch risks. Feasibility of substitution therefore depends heavily on the specific application frequency and connector layout; even for low‑frequency use, connector compatibility should be carefully evaluated.

Analysis ID: 769E-5FDC000

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