Original Part
Alternative Part
1. LCAT1002-03 Substitution Conclusion
Direct substitution is not recommended. The LCAT1002-03 differs from the original part LCAT1000-03 in that its frequency range is limited to 0 Hz to 3 GHz, whereas the original part supports 0 Hz to 6 GHz. Within the 3 GHz to 6 GHz band, the performance of the LCAT1002-03—including parameters such as attenuation accuracy and VSWR—may degrade significantly or even fail. If the original system operates within or may be extended into this frequency range, using this part will directly lead to degraded system performance or functional failure. Therefore, it can only be considered as a downgraded substitute in applications strictly limited to below 3 GHz.
2. FMAT7620-3 Substitution Conclusion
Substitution is technically fully viable and represents a performance upgrade. The key difference between the FMAT7620-3 and the original LCAT1000-03 is its extended frequency range of 0 Hz to 18 GHz, which far exceeds the original part's 6 GHz upper limit, while maintaining identical attenuation (3dB), power handling (2W), and impedance (50Ω). This part not only fully covers and guarantees all performance requirements of the original system in the 0-6 GHz band but also provides the capability to operate at higher frequencies, offering headroom for potential future system upgrades. The primary considerations for substitution would center on non-technical factors such as supply chain implications, cost differences due to the brand change, and potential mechanical compatibility with the existing PCB (e.g., minor interface discrepancies).
Analysis ID: 86E5-26B4000
Based on part parameters and for reference only. Not to be used for procurement or production.
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