1. FMAT7624-30 Substitution Conclusion Based on a comparison of key electrical parameters and mechanical specifications, the FMAT7624-30 can serve as a direct replacement for the original part SA18N5WA-30. The critical performance metrics of both attenuators are identical: attenuation value (30 dB), frequency range (DC–18 GHz), impedance (50 Ω), rated power (5 W), and package style (N‑type plug‑in module). There is no functional difference between the two in terms of RF signal‑processing capability, bandwidth suitability, or power‑handling performance. The differences lie in the part‑numbering convention and minor descriptive details regarding the interface labeling (e.g., the original part emphasizes “PLUG‑JACK,” whereas the substitute is marked “N‑TYPE MA”). These distinctions typically reflect the manufacturer’s internal product‑line classification or connector‑gender designation. In practice, the physical interfaces of both units are standard N‑type and do not affect electrical connectivity or mechanical compatibility. For general‑purpose applications that do not require specific qualification levels (such as military or aerospace grades), the FMAT7624‑30 can be considered a functional equivalent to the original part. However, it is recommended to verify mechanical fit‑up with the existing port structure in the system before implementing the substitution.