1. FMAT7463-10 Substitution Conclusion Conclusion Summary: The FMAT7463-10 is identical to the original FMAT7626-10 part in core parameters such as attenuation value, power handling capacity, and impedance. However, its effective operational frequency range (0–12.4 GHz) is significantly narrower than the original part's 0–18 GHz range. The feasibility of substitution depends entirely on the actual operating frequency of the application circuit. If the system's maximum operating frequency does not exceed 12.4 GHz, the FMAT7463-10 can serve as a direct and reliable replacement. If the system operates within the 12.4 GHz to 18 GHz range, this substitution is not viable. Within this higher frequency band, the performance of the FMAT7463-10—including its attenuation accuracy and VSWR—cannot be guaranteed and may lead to component overheating or failure.