FMAT7620-3 Replacement: SA3R-03, FMAT1009

Original Part

FMAT7620-3

Fairview Microwave

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

Alternative Part

SA3R-03

Fairview Microwave

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

FMAT1009

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

1. SA3R-03 Substitution Conclusion This component is not a viable substitute unless it can be strictly ensured that the maximum operating frequency of the system does not exceed 3 GHz. The fundamental limitation lies in its frequency range (0–3 GHz), which is significantly narrower than that of the original part (0–18 GHz). If signals above 3 GHz are present in the system, the SA3R-03 will fail to provide accurate and stable 3 dB attenuation. Its actual attenuation will deviate from the nominal value, introducing unpredictable insertion loss and impedance mismatch. This may lead to signal distortion, measurement errors, or degradation in system performance.

2. FMAT1009 Substitution Conclusion Substitution with this component carries risk and should only be considered if the system’s maximum operating frequency is confirmed not to exceed 6 GHz. Similarly, its frequency range (0–6 GHz) is narrower than that of the original part (0–18 GHz). The attenuation performance of this device in the 6 GHz to 18 GHz range has not been verified, and key parameters such as attenuation accuracy and VSWR cannot be guaranteed. When used in broadband or high-frequency systems, it poses performance uncertainty risks similar to those of the SA3R-03, though occurring at a slightly higher frequency band.

Analysis ID: 61EC-9EB6000

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