FMAT7466-9 Replacement: M3933/30-19S, SA6-09

Original Part

FMAT7466-9

Fairview Microwave

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

Alternative Part

M3933/30-19S

Amphenol SV Microwave

RF Attenuators 9dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

SA6-09

Fairview Microwave

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

1. M3933/30-19S Substitution Conclusion From a review of key electrical parameters, the M3933/30-19S is fully viable as a direct substitute for the original FMAT7466-9. Both parts are identical in attenuation value (9dB), impedance (50Ω), power handling (2W), and connector interface (SMA In-Line). The core distinction is that the M3933/30-19S offers a significantly wider frequency range (0-32 GHz) compared to the original's upper limit of 12 GHz. Within the original design's 12 GHz operational bandwidth, the substitute component provides substantial performance margin. Its broadband nature typically ensures superior VSWR and attenuation flatness at lower frequencies. Therefore, a direct replacement is feasible, with performance expected to be equivalent or superior.

2. SA6-09 Substitution Conclusion While the SA6-09 matches the original part in basic parameters such as attenuation, impedance, power rating, and interface—and is from the same manufacturer—substitution requires extreme caution and a thorough assessment of the application. Its critical limitation is an operational frequency range (0-6 GHz) that is only half that of the original component (0-12 GHz). If the host circuit operates above 6 GHz, using the SA6-09 will cause excessive signal attenuation, significant performance degradation, or complete failure. Substitution is permissible only upon confirmation that the system's maximum operational frequency does not exceed 6 GHz. Otherwise, this substitute is not viable.

Analysis ID: 9580-AFAC000

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