1. FMAT7623-30 Substitution Conclusion The FMAT7623-30 is a fully compatible drop-in replacement for the original SA6S5W-30 part. Key electrical specifications—including attenuation (30 dB), power rating (5 W), and impedance (50 Ω)—as well as the mechanical interface (SMA in-line module) remain identical. The primary difference lies in the frequency range, which has been extended from 0–6 GHz to 0–18 GHz. By covering all operating frequencies of the original part, the FMAT7623-30 offers wider high‑frequency bandwidth, making it suitable for higher‑frequency applications. Moreover, across the 0–6 GHz band, its performance is equivalent to that of the original part. The broadband design generally does not compromise low‑frequency stability. The substitution is therefore directly feasible and may enhance the system’s frequency‑band adaptability.