FMAT7466-20 Replacement: AT-120V, M3933/14-04S

Original Part

FMAT7466-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-120V

Hirose Electric Co Ltd

RF Attenuators 20dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/14-04S

Amphenol SV Microwave

RF Attenuators 20dB 0 Hz ~ 12.4 GHz 50 Ohms 2W SMA In-Line Module

1. AT-120V Substitution Conclusion The AT-120V is a fully acceptable substitute for the original FMAT7466-20, offering higher frequency performance margin. The key difference lies in its frequency range (0–18 GHz), which is superior to the original's 0–12 GHz. At frequencies above 12 GHz, the AT-120V maintains its specified 20 dB attenuation and 2W power handling capability, whereas the performance of the original part may begin to deviate or degrade in this band. For systems operating within 12 GHz, the AT-120V is a performance-equivalent or superior drop-in replacement. For applications up to 18 GHz, it provides reliable attenuation performance that the original part cannot guarantee.

2. M3933/14-04S Substitution Conclusion The M3933/14-04S can be considered a direct, form-fit-function equivalent to the original FMAT7466-20, with very high compatibility. The only minor discrepancy is a slight difference in the upper frequency limit (12.4 GHz vs. 12 GHz). In practical engineering applications, this 0.4 GHz variance is negligible; both parts demonstrate interchangeable electrical performance across the original part's entire operational band (0–12 GHz). The M3933/14-04S may even maintain specified performance in the 12–12.4 GHz range. With identical core parameters (attenuation value, power rating, impedance, and connector interface), this substitute offers nearly identical performance coverage, representing a very low-risk alternative.

Analysis ID: E29F-3BCE000

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