AT-109V Replacement: FMAT7466-9, SA26B-09

Original Part

AT-109V

Hirose Electric Co Ltd

RF Attenuators 9dB 0 Hz ~ 18 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

SA26B-09

Fairview Microwave

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

1. FMAT7466-9 Substitution Conclusion The FMAT7466-9 is not a fully equivalent drop-in replacement for the AT-109V and can only be used as a downgraded substitute under limited conditions. The key discrepancy lies in the frequency range (0-12 GHz vs. 0-18 GHz). When the system operates above 12 GHz, critical performance parameters of this attenuator—such as attenuation value and VSWR—will degrade significantly or even fail. This can introduce unpredictable signal loss and reflections. Therefore, its use is strictly limited to applications where the operating band is definitively below 12 GHz.

2. SA26B-09 Substitution Conclusion The SA26B-09 serves as an excellent replacement for the AT-109V. The primary difference is its extended frequency range (0-26 GHz vs. 0-18 GHz). It delivers the nominal attenuation performance across the original part's entire operational bandwidth (up to 18 GHz) and offers additional frequency margin. This typically results in superior broadband performance and enhanced reliability. It is a substitution option that not only fully covers but also improves upon the electrical specifications of the original component.

Analysis ID: 67E1-0851000

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