M3933/30-03S Replacement: FMAT7466-1, SA6H-01

Original Part

M3933/30-03S

Amphenol SV Microwave

RF Attenuators 1dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

FMAT7466-1

Fairview Microwave

RF Attenuators 1dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

SA6H-01

Fairview Microwave

RF Attenuators 1dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

1. FMAT7466-1 Substitution Conclusion The FMAT7466-1 can be used as a substitute for the original part, but only in applications where the operating frequency does not exceed 12 GHz. Compared to the original part (Amphenol SV Microwave M3933/30-03S), the key difference lies in the frequency range (0–12 GHz vs. 0–32 GHz). If the system operates above 12 GHz, this substitute part cannot guarantee the specified attenuation accuracy and impedance matching, which may lead to signal distortion or additional insertion loss. Other critical parameters—such as attenuation value (1 dB), power handling (2 W), and connector type (SMA In-Line Module)—remain identical, so direct substitution is acceptable for frequencies below 12 GHz.

2. SA6H-01 Substitution Conclusion The SA6H-01 can only replace the original part in low-frequency applications up to 6 GHz; its suitability is severely limited at higher frequencies. The difference again stems from the frequency range (0–6 GHz vs. 0–32 GHz). When operating above 6 GHz, the actual attenuation of this attenuator may deviate from the nominal value, and RF performance metrics such as voltage standing wave ratio (VSWR) can degrade significantly. This may result in increased system reflections or insufficient bandwidth. Although its power rating, impedance, and mechanical package match the original part, the limited frequency bandwidth restricts its use to narrowband or low-frequency circuit replacements.

Analysis ID: FA70-F099000

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