Original Part
Alternative Part
1. LCAT1002-03 Substitution Conclusion
The LCAT1002-03 matches the original part in attenuation value, power handling, impedance, and connector interface. However, its key limitation is a reduced operational frequency range of DC-3 GHz, significantly lower than the original's DC-18 GHz. If your application circuit or test system operates above 3 GHz, substituting with this part will introduce unpredictable additional signal loss and performance degradation. This could lead to failure in meeting system specifications or even functional failure. It may be considered as a low-cost alternative only in applications where the operating frequency is strictly and consistently confirmed to be below 3 GHz. For full-bandwidth (0-18 GHz) applications, this substitution is not viable.
2. FMAT7620-3 Substitution Conclusion
The FMAT7620-3 is identical to the original Rosenberger part in all key electrical parameters (3dB attenuation, DC-18 GHz frequency range, 2W power rating, 50Ω impedance) and mechanical interface (straight SMA). This indicates it can serve as a direct and functionally equivalent drop-in replacement in the vast majority of application scenarios. It should be noted that subtle differences may exist between manufacturers in non-core yet important specifications such as passive intermodulation (PIM), voltage standing wave ratio (VSWR), temperature stability, and long-term reliability. Therefore, it is recommended to perform in-circuit verification before deployment in highly demanding systems (e.g., base stations, aerospace). Overall, this is a highly feasible and recommended alternative.
Analysis ID: 5997-7F33000
Based on part parameters and for reference only. Not to be used for procurement or production.
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