LCAT1000-12 Replacement: FMAT7611-12, FMAT7620-12

Original Part

LCAT1000-12

L-com

RF Attenuators 12dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

FMAT7611-12

Fairview Microwave

RF Attenuators 12dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

FMAT7620-12

Fairview Microwave

RF Attenuators 12dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. FMAT7611-12 Substitution Conclusion Substitution is feasible and offers superior performance coverage. From a core electrical parameter perspective, the FMAT7611-12 is identical to the original part in attenuation value (12 dB), power handling (2 W), and impedance (50 Ω). The interface form (inline SMA male) is also the same, ensuring fundamental electrical and mechanical compatibility. The key difference lies in its extended frequency range of 0-18 GHz, which is significantly wider than the original part's 0-6 GHz range. This part employs higher-frequency microwave design, materials, and processes. Consequently, within the original operating band below 6 GHz, its performance metrics—such as attenuation accuracy and voltage standing wave ratio (VSWR)—are typically superior to or at least equivalent to the original part. Furthermore, it provides ample headroom for potential future high-frequency applications within the system, making it a direct performance upgrade.

2. FMAT7620-12 Substitution Conclusion Substitution is feasible, but attention must be paid to unspecified high-frequency performance details. Based on the provided parameters, the FMAT7620-12 is identical to the FMAT7611-12 in attenuation value, power handling, impedance, interface, and frequency range (0-18 GHz). Therefore, the feasibility conclusion for substituting the original part is consistent with the statement above: it represents a higher-performance upgrade option. When a manufacturer assigns different part numbers (FMAT7611-12 vs. FMAT7620-12) to products with seemingly identical listed specifications, there are typically differences in unlisted key performance indicators. These may include variations in attenuation flatness, VSWR, or phase characteristics at higher frequencies (e.g., 12-18 GHz). If the application is strictly limited to frequencies below 6 GHz, either part can serve as a substitute. However, if the full frequency range is utilized or if high-frequency performance is critical, consulting the detailed technical datasheet for final verification is mandatory.

Analysis ID: 8FAE-E51D000

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