SA26B-09 Replacement: FMAT7466-9, SA18E-09

Original Part

SA26B-09

Fairview Microwave

RF Attenuators 9dB 0 Hz ~ 26 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

FMAT7466-9

Fairview Microwave

RF Attenuators 9dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

SA18E-09

Fairview Microwave

RF Attenuators 9dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. FMAT7466-9 Substitution Conclusion The FMAT7466-9 can serve as a conditional substitute for the SA26B-09. The key difference lies in its frequency range, which is limited to 0 Hz – 12 GHz (the SA26B-09 supports 0 Hz – 26 GHz). In applications above 12 GHz—such as Ku/Ka-band or millimeter‑wave front‑end circuits—this part will not maintain its specified attenuation accuracy and matching performance, potentially leading to signal distortion or reduced system efficiency. If the actual operating frequency is ≤ 12 GHz and the power rating, connector type (SMA), and impedance (50 Ω) meet the requirements, direct substitution is acceptable.

2. SA18E-09 Substitution Conclusion The SA18E-09 is a closer alternative, with a frequency range covering 0 Hz – 18 GHz. While still lower than the original part’s 26 GHz, it satisfies most C‑, X‑, and Ku‑band applications. The limitation is that performance above 18 GHz cannot be guaranteed; if the system operates beyond 18 GHz (e.g., in certain radar or satellite communication bands), additional insertion loss or reflection may occur. For scenarios below 18 GHz, its electrical parameters (9 dB attenuation, 2 W power handling) and mechanical interface (SMA) are compatible with the original part, allowing a safe replacement.

Analysis ID: 9886-45EA000

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