Original Part
Alternative Part
1. LCAT1005-20 Substitution Conclusion
The LCAT1005-20 can serve as a complete drop-in replacement for the original SA3SR-20 part. The key difference lies in the frequency range: the LCAT1005-20 operates from 0 Hz to 18 GHz, whereas the original part is limited to 0 Hz to 3 GHz. With its wider bandwidth coverage, the LCAT1005-20 not only matches the original specifications within the application’s maximum frequency of 3 GHz—including attenuation (20 dB), impedance (50 Ω), power handling (2 W), and package (SMA In-Line Module)—but also provides higher performance margin and improved high-frequency stability. Its design is optimized for higher frequency operation, which may result in lower insertion loss and flatter attenuation characteristics at 3 GHz and below. Provided the cost is acceptable, the LCAT1005-20 represents a direct upgrade path, particularly suitable for systems that may later expand into higher frequency ranges.
2. LCAT1000-20 Substitution Conclusion
The LCAT1000-20 is also a viable replacement for the original SA3SR-20. The primary variation is in frequency range: the LCAT1000-20 covers 0 Hz to 6 GHz, extending beyond the original part’s 3 GHz upper limit. Within the original frequency band, the LCAT1000-20 maintains full compatibility while offering additional bandwidth headroom. This ensures more reliable performance at 3 GHz and potentially better attenuation accuracy and temperature stability near the high‑frequency end. Since all other critical parameters—attenuation, impedance, power rating, and package—remain identical to the original, the substitution is technically seamless. It is well‑suited for applications requiring moderate frequency extension or cost optimization, though it is not intended for very high‑frequency use beyond 6 GHz, unlike the LCAT1005-20.
Analysis ID: 2D31-ECFF000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com