AT-103V Replacement: FMAT7466-3, SA3R-03

Original Part

AT-103V

Hirose Electric Co Ltd

RF Attenuators 3dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

FMAT7466-3

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

SA3R-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

1. FMAT7466-3 Substitution Conclusion The FMAT7466-3 can serve as a conditional substitute for the original AT-103V, with its primary limitation being the frequency range. The two devices are fully aligned on key specifications, including attenuation (3 dB), power handling (2 W), impedance (50 Ω), and connector type (SMA). The main differentiator is the maximum operating frequency: the FMAT7466-3 is rated for 12 GHz, which is lower than the AT-103V's 18 GHz. For application systems operating at or below 12 GHz, the FMAT7466-3 is fully compatible and can be used as a direct replacement. However, if the system operates between 12 GHz and 18 GHz, the FMAT7466-3 will not meet requirements, potentially leading to performance degradation or failure.

2. SA3R-03 Substitution Conclusion The SA3R-03 is not recommended as a direct substitute for the original AT-103V, primarily due to its significantly narrower frequency range. While both components share identical attenuation, power rating, impedance, and interface, the SA3R-03's maximum operating frequency is only 3 GHz—a substantial gap compared to the AT-103V's 18 GHz. The SA3R-03 is suitable only for low-frequency applications below 3 GHz. If deployed in a system operating at the higher frequencies covered by the original design (especially above 3 GHz), it would introduce unpredictable additional loss and performance degradation, which would likely cause the system to malfunction.

Analysis ID: 28FE-4D06000

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