FMAT7620-10 Replacement: AT-110V, M3933/30-21N

Original Part

FMAT7620-10

Fairview Microwave

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

Alternative Part

AT-110V

Hirose Electric Co Ltd

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

M3933/30-21N

Amphenol SV Microwave

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

1. AT-110V Substitution Conclusion From the perspective of core electrical parameters and mechanical interface, the AT-110V is a viable direct replacement for the original FMAT7620-10 part. Both units are identical in attenuation value (10 dB), impedance (50 Ω), rated power (2 W), frequency range (DC‑18 GHz), and package style (SMA inline module), and both are commercial‑grade products (not special or military‑qualified). The main differences lie in the manufacturer (Hirose Electric vs. Fairview Microwave), which may result in minor variations in supply‑chain source, price, lead time, and non‑critical characteristics such as housing finish or internal soldering process. Provided the application does not impose requirements beyond standard commercial specifications—such as exceptional attenuation accuracy, temperature stability, or VSWR—the AT‑110V can be considered an equivalent substitute.

2. M3933/30-21N Substitution Conclusion The M3933/30-21N also meets the basic substitution criteria. Its frequency range (DC‑32 GHz) is wider than that of the original part (DC‑18 GHz), maintaining specified attenuation performance and impedance matching up to 32 GHz. If the existing system operates below 18 GHz, this difference offers no additional benefit but does not affect normal operation. Should the system later be extended to higher frequencies, this part provides better bandwidth compatibility. All other key parameters (10 dB, 50 Ω, 2 W, SMA inline module) match the original. The primary distinction again is the manufacturer (Amphenol SV Microwave) and its associated production processes and quality‑control standards. As long as the application does not require special environmental qualifications (e.g., military or space‑grade), the M3933/30-21N can serve as a performance‑equivalent, and potentially bandwidth‑enhanced, alternative.

Analysis ID: 9FCA-BCC0000

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