Original Part
Alternative Part
1. M3933/30-25S Substitution Conclusion
The M3933/30-25S can serve as a direct replacement for the original FMAT7620-12, as it matches all key specifications including attenuation (12 dB), power rating (2 W), and impedance (50 Ω). Additionally, it offers a wider frequency range (0–32 GHz vs. the original 0–18 GHz), ensuring stable performance at higher frequencies while remaining fully backward‑compatible within the original operating band. This provides extra performance margin and potential for system expansion. Provided the physical connector (SMA In‑Line Module) is compatible with the existing system—for example, maintaining an SMA male configuration—the substitution is viable. Note, however, that manufacturer differences may introduce slight variations in supply chain or quality control; compatibility should be verified in the actual application.
2. SA18H-12 Substitution Conclusion
The SA18H-12 is identical to the original FMAT7620-12 in all core parameters: attenuation, frequency range (0–18 GHz), power rating, and impedance. It is also from the same manufacturer. However, the description “PLUG‑JACK SMA SS 1.35” suggests a connector configuration that is likely SMA plug‑jack (male‑female), whereas the original part uses an SMA male connector. This physical interface mismatch could create connection issues if the system requires both ends to be male. In such cases, an adapter or harness modification would be necessary. Substitution feasibility therefore depends on the specific system interface requirements. If the connector configuration is acceptable or can be resolved with an adapter, the part can be used; otherwise, careful evaluation is recommended.
Analysis ID: 3505-67A7000
Based on part parameters and for reference only. Not to be used for procurement or production.
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