1. FMAT7623-30 Substitution Conclusion The FMAT7623-30 can serve as a full and performance‑enhanced replacement for the original SA3S5W‑30 part. Both parts are identical in their key electrical parameters (30 dB attenuation, 5W power handling, 50Ω impedance) and mechanical package (SMA straight‑through pin), ensuring full electrical compatibility and drop‑in physical installation. The primary difference lies in the frequency range: the FMAT7623‑30 supports 0–18 GHz, significantly wider than the original’s 0–3 GHz. The replacement part maintains its specified attenuation accuracy and power rating up to 18 GHz, offering superior high‑frequency performance and broader bandwidth. For applications originally operating below 3 GHz, the substitute provides increased performance margin. Should the system later be upgraded beyond 3 GHz, this replacement remains fully suitable. The substitution is electrically and mechanically seamless while delivering a substantial upgrade in frequency performance.