Original Part
Alternative Part
1. FMAT7611-12 Substitution Conclusion
Based on key electrical specifications—attenuation (12dB), frequency range (DC-18GHz), power rating (2W), impedance (50Ω)—and package form (SMA In-Line Module), the FMAT7611-12 is electrically identical to the original part SA18H-12, providing a solid foundation for direct substitution. The difference lies in the connector interface type: the original part is described as “PLUG-JACK,” typically indicating a transition structure with one male (Plug) and one female (Jack) end, whereas the FMAT7611-12 is clearly specified as “SMA MALE,” meaning both ends are male connectors. Mechanically, the FMAT7611-12 cannot serve as a gender changer like the SA18H-12. If the original circuit design relies on its “plug-jack” interface characteristic, direct replacement will result in a physical connection mismatch. Connection can only be achieved by adding an external SMA male-to-male adapter or changing the mating connector on the opposite end. This is the key issue that must be addressed during substitution.
2. FMAT7620-12 Substitution Conclusion
The FMAT7620-12 matches the original part SA18H-12 completely in core specifications such as attenuation, frequency range, power rating, impedance, and package, confirming its electrical suitability for direct replacement. Similar to the FMAT7611-12, the difference from the original part is also focused on the connector interface: it also features an “SMA MALE” (both ends male) design, while the original SA18H-12 has a “PLUG-JACK” (one male, one female) structure. The FMAT7620-12 lacks the gender conversion function in its mechanical interface; direct substitution would disrupt the original cable or equipment mating scheme. Its substitution feasibility depends heavily on the specific application scenario: if the attenuator in the original circuit is used solely as a series attenuation element and the genders of the mating connectors at both ends permit or can be adjusted, then substitution is possible. However, if the original design utilizes its unique interface for circuit interconnection or port conversion, direct replacement is not feasible.
Analysis ID: D52D-4644000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com