1. M3933/30-13S Substitution Conclusion Based on a comparison of key technical parameters, the M3933/30-13S can fully replace the original FMAT7620-6 part and offers potential performance enhancements. Both devices share identical core specifications: attenuation (6 dB), power handling (2 W), and impedance (50 Ω). The interface type is SMA coaxial connector for both, ensuring good mechanical compatibility. The critical difference is that the M3933/30-13S extends the frequency range to 0–32 GHz (compared to 0–18 GHz for the original part). This makes the substitute more suitable for high‑frequency applications, particularly in Ka‑band or wider‑bandwidth systems, and typically indicates that its internal structure and materials provide better matching characteristics for high‑frequency signals. However, if the original application operates below 18 GHz, this difference has no impact. Overall, the substitution is feasible both electrically and mechanically and may offer additional bandwidth margin.