FMAT7620-10 Replacement: M3933/30-21S, 32AS102-K10S3

Original Part

FMAT7620-10

Fairview Microwave

RF Attenuators 10dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

M3933/30-21S

Amphenol SV Microwave

RF Attenuators 10dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

32AS102-K10S3

Rosenberger

RF Attenuators 10dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. M3933/30-21S Substitution Conclusion The substitution is fully viable and offers performance improvements. The M3933/30-21S is identical to the original FMAT7620-10 in all core specifications (10 dB attenuation, 50Ω impedance, 2W power rating, and connector interface). However, its frequency range (DC to 32 GHz) is significantly wider than the original part's 18 GHz. This makes the M3933/30-21S more versatile for high-frequency applications. It fully covers and exceeds the operational envelope of the original part, providing greater performance margin, particularly in Ku-band, Ka-band, or broadband systems. Disregarding brand preference and cost, the M3933/30-21S is a high-performance drop-in replacement.

2. 32AS102-K10S3 Substitution Conclusion This part is a direct electrical and mechanical form-fit-function substitute. The 32AS102-K10S3 matches the original FMAT7620-10 in all listed key parameters (attenuation, frequency range of DC-18 GHz, power handling, impedance, and interface) with no technical discrepancies. Both components exhibit identical attenuation, power handling, and impedance matching characteristics in typical RF links up to 18 GHz, enabling a plug-and-play replacement. The feasibility of this substitution therefore hinges primarily on non-technical factors, such as supply chain stability, cost, and customer acceptance of the Rosenberger brand.

Analysis ID: FD90-3BBD000

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