AT-109V Replacement: LCAT1000-09, FMAT7620-9

Original Part

AT-109V

Hirose Electric Co Ltd

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

Alternative Part

LCAT1000-09

L-com

RF Attenuators 9dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

FMAT7620-9

Fairview Microwave

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

1. LCAT1000-09 Substitution Conclusion The LCAT1000-09 is not a direct substitute for the AT-109V. The key difference lies in its frequency range, which is limited to 0 Hz to 6 GHz, whereas the original part supports up to 18 GHz. In the 6 GHz to 18 GHz band, critical performance parameters of the LCAT1000-09—including attenuation, impedance matching, and power handling—will deviate significantly from their nominal specifications. This deviation may lead to excessive insertion loss, increased signal reflection, and potential device failure. Consequently, the LCAT1000-09 is suitable only for low-frequency applications where the operating frequency is definitively below 6 GHz. It is not a viable replacement for designs requiring full DC-18 GHz bandwidth.

2. FMAT7620-9 Substitution Conclusion The FMAT7620-9 is an electrically direct substitute for the AT-109V. Both devices share identical core specifications: attenuation (9 dB), frequency range (DC-18 GHz), impedance (50 Ω), and power rating (2 W). They also share the same SMA feedthrough module package. Across the entire DC to 18 GHz spectrum, the FMAT7620-9 provides equivalent attenuation accuracy, power handling capability, and impedance matching characteristics as the original part. It can be integrated into the existing circuit without compromising high-frequency system performance. When considering substitution, only non‑technical factors such as manufacturer reliability, supply chain availability, and cost need to be evaluated.

Analysis ID: ED27-F383000

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