1. FMAT7626-20 Substitution Conclusion Based on a technical parameter comparison, the FMAT7626-20 can directly replace the original part SA18S10W-20. The two attenuators share identical core electrical and mechanical specifications, including a 20dB attenuation value, 0–18GHz frequency range, 10W power handling, 50Ω impedance, and SMA coaxial packaging. They are fully equivalent in terms of RF performance, power handling, and system matching. The primary difference lies solely in the connector interface: the original part is specified as "Plug-Jack" (i.e., one male and one female connector), whereas the FMAT7626-20 is designated as "SMA Male" (both ends male). During physical installation, this substitution may require adjusting the connector gender on the attached cables or using an adapter, but it will not affect electrical performance. Provided that the physical interconnection is properly adapted, the FMAT7626-20 can serve as a functional replacement for the SA18S10W-20.