Original Part
Alternative Part
1. LCAT1001-08 Substitution Conclusion
The LCAT1001-08 cannot serve as a full drop-in replacement for the SA18H-08 and may only be substituted under strictly defined conditions. The core difference lies in the frequency range: the original part covers 0–18 GHz, whereas the LCAT1001-08 only supports 0–3 GHz. If the application frequency exceeds 3 GHz—such as in C‑band, X‑band, or Ku‑band microwave frequencies—key performance parameters including attenuation accuracy and VSWR cannot be guaranteed. Mismatch or excessive insertion loss could even lead to system failure. Therefore, it is only suitable for low‑frequency applications where the operating frequency remains entirely below 3 GHz.
2. FMAT7620-8 Substitution Conclusion
The FMAT7620-8 is a direct and feasible replacement for the SA18H-08. Based on the provided key parameter comparison, both devices are identical in attenuation value (8 dB), frequency range (DC–18 GHz), rated power (2 W), impedance (50 Ω), and interface type (SMA in‑line module). This parameter alignment ensures that the FMAT7620-8 meets the original design requirements in terms of electrical performance and mechanical compatibility. It provides equivalent attenuation and power‑handling capability across the full DC to 18 GHz range, enabling a plug‑and‑play substitution.
Analysis ID: D966-953B000
Based on part parameters and for reference only. Not to be used for procurement or production.
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