LCAT1000-20 Replacement: FMAT7466-20, SA26B-20

Original Part

LCAT1000-20

L-com

RF Attenuators 20dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

FMAT7466-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

SA26B-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 26 GHz 50 Ohms 2W SMA In-Line Module

1. FMAT7466-20 Substitution Conclusion The FMAT7466-20 can serve as a direct substitute for the LCAT1000-20. Both share identical core specifications—20 dB attenuation, 50 Ω impedance, 2 W power handling, and SMA connectors. The key difference lies in the frequency range: the original part supports DC to 6 GHz, while the FMAT7466-20 offers a wider DC to 12 GHz bandwidth. Within the 0–6 GHz range, the two parts are electrically equivalent and can be interchanged directly. Beyond 6 GHz and up to 12 GHz, the original part either ceases to function or exhibits degraded performance, whereas the substitute maintains accurate 20 dB attenuation. Therefore, the FMAT7466-20 not only fully covers the original application space but also extends usability into higher‑frequency systems, representing a performance‑upward compatible replacement.

2. SA26B‑20 Substitution Conclusion The SA26B‑20 is a higher‑performance alternative to the LCAT1000‑20. It matches the original part in critical electrical parameters (20 dB, 50 Ω, 2 W) and mechanical interface (SMA). Its primary technical advantage is an extremely wide frequency range—DC to 26 GHz. While fully covering all applications of the original part up to 6 GHz, the SA26B‑20 far exceeds the original’s high‑frequency performance, providing headroom for future system upgrades into Ku‑band and beyond. This substitution is not merely a functional drop‑in replacement, but also a forward‑looking performance upgrade for high‑frequency applications, though typically at a higher cost.

Analysis ID: 8075-2B83000

Based on part parameters and for reference only. Not to be used for procurement or production.