1. FMAT7624-2 Substitution Conclusion Feasible, and represents a performance‑enhanced direct replacement. The key electrical parameters (attenuation 2 dB, impedance 50 Ω, power rating 5 W) and mechanical interface (N‑type in‑line) of both parts are identical, ensuring direct compatibility for basic functionality. The difference lies in the frequency range: the original part (SA3N5W‑02) supports DC‑3 GHz, whereas the FMAT7624‑2 supports DC‑18 GHz. The FMAT7624‑2 employs a wider‑bandwidth design along with higher‑performance substrate materials and processing, enabling it to maintain accurate attenuation characteristics and good impedance matching up to 18 GHz in the millimeter‑wave band. When operating at or below the original part’s 3 GHz range, its performance will be equal to or better than the original, while providing additional frequency margin. This enhances the system’s tolerance to high‑frequency harmonics and future upgrades. Given the compatibility of electrical and mechanical interfaces, substituting the SA3N5W‑02 with the FMAT7624‑2 is fully technically feasible and introduces no risk of performance degradation.