1. FMAT7624-10 Substitution Conclusion The FMAT7624-10 is fully capable of replacing the original part 53AS105-K10N3. The core parameters of both attenuators—including attenuation value (10 dB), rated power (5 W), characteristic impedance (50 Ω), and connector interface (N-type)—are identical, ensuring direct compatibility in basic functionality. The difference lies in the frequency range: the original part supports 0–10 GHz, whereas the FMAT7624-10 extends the upper frequency limit to 18 GHz. Within the common operating band below 10 GHz, both devices exhibit equivalent performance and can be interchanged seamlessly. Moreover, the FMAT7624-10 offers extended high-frequency capability, which provides headroom for potential future system frequency upgrades. In existing applications, it may also deliver improved high‑frequency edge performance—such as port VSWR—representing a positive performance enhancement. Based on the technical parameter comparison, this substitution carries no risk of performance degradation and may offer potential advantages in performance margin.