1. FMAT7620-10 Substitution Conclusion From the perspective of core electrical parameters and mechanical interfaces, the FMAT7620-10 is a viable direct replacement for the original AT-110V part. Their key specifications are fully aligned: attenuation value (10 dB), frequency range (DC–18 GHz), characteristic impedance (50 Ω), rated power (2 W), and package form (SMA inline module). This ensures equivalent signal attenuation and power‑handling capability in the majority of general‑purpose RF links. The difference lies in the manufacturer (Fairview Microwave replacing Hirose). Although the nominal parameters are identical, actual performance may be influenced by internal design, material processes, and quality‑control standards. Unspecified variations could exist, for example, in attenuation flatness near the band edges, minor fluctuations in voltage standing‑wave ratio (VSWR), or long‑term stability. For general commercial or laboratory applications, the FMAT7620‑10 can be used as a direct substitute. In high‑precision metrology, extreme‑environment, or military‑grade applications, it is recommended to verify the detailed performance curves and reliability data in the respective datasheets to ensure full compatibility.