Original Part
Alternative Part
1. FMAT1009 Substitution Conclusion
Based on core electrical parameters and mechanical interface, the FMAT1009 can serve as a drop-in replacement for the SA3R-03. The primary difference lies in the frequency range: the FMAT1009 supports 0–6 GHz, which is superior to the original part's 0–3 GHz. Within the 3–6 GHz band, the FMAT1009 provides effective and accurate 3 dB attenuation, whereas the performance of the original part in this range may not be guaranteed. Across the common 0–3 GHz range, performance should be essentially identical. Attenuation value, power handling, impedance, and SMA connector type are all identical, enabling direct substitution. The only non‑critical point to note is a possible slight difference in physical length, as suggested by the descriptions (“1.07” vs. “1.25”), which may require verification in extremely space‑constrained installations.
2. SA6‑03 Substitution Conclusion
The SA6‑03 is also a viable substitute for the SA3R‑03, with a feasibility conclusion highly similar to that of the FMAT1009. The key improvement is again the extended frequency range (0–6 GHz vs. 0–3 GHz), effectively doubling the operational bandwidth of the original part and ensuring reliable performance in higher‑frequency applications. All other critical parameters—attenuation, power rating, impedance, and connector type—are fully matched. Similar to the FMAT1009, the listed dimension “1.3” may indicate a minor physical length difference compared to the original “1.25”, but this typically does not affect electrical connectivity or most mechanical mounting scenarios. The SA6‑03 is a qualified replacement that meets and exceeds the performance of the original part.
Analysis ID: 8D98-860F000
Based on part parameters and for reference only. Not to be used for procurement or production.
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