LCAT1000-03 Replacement: SA3R-03, FMAT1009

Original Part

LCAT1000-03

L-com

RF Attenuators 3dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

SA3R-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

FMAT1009

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

1. SA3R-03 Substitution Conclusion The SA3R-03 matches the original LCAT1000-03 in attenuation (3 dB), impedance (50 Ω), power rating (2 W), and package (SMA inline module). However, its frequency range is limited to 0 Hz–3 GHz, whereas the original part supports 0 Hz–6 GHz. The SA3R-03 is therefore suitable only for low‑frequency applications not exceeding 3 GHz. If the system operates above 3 GHz or requires full‑band coverage up to 6 GHz, the SA3R-03 cannot replace the original part and may lead to degraded attenuation performance or system failure. For low‑frequency applications it can serve as a temporary substitute, but the frequency requirements must be strictly evaluated.

2. FMAT1009 Substitution Conclusion The FMAT1009 fully aligns with the original LCAT1000-03 in all key specifications: attenuation (3 dB), frequency range (0 Hz–6 GHz), impedance (50 Ω), power rating (2 W), and package (SMA inline module). No significant differences exist. It can be used as a direct drop‑in replacement, providing identical attenuation and power‑handling capability in RF systems from DC to 6 GHz while maintaining signal integrity. Although the manufacturer changes from L‑com to Fairview Microwave, the complete parametric compatibility ensures a viable substitution without requiring additional circuit modifications.

Analysis ID: 2390-18E6000

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