LCAT1006-20 Replacement: FMAT7466-20, SA26B-20

Original Part

LCAT1006-20

L-com

RF Attenuators 20dB 0 Hz ~ 18 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 is not recommended as a direct replacement for the LCAT1006-20. Its core limitation is an upper operating frequency limit of only 12 GHz, which is significantly lower than the original part's 18 GHz. Within the 12 GHz to 18 GHz frequency range, the performance of this attenuator cannot be guaranteed. This may result in significant deviation from the nominal 20dB attenuation value, degradation of Voltage Standing Wave Ratio (VSWR), and the introduction of unacceptable measurement errors or signal distortion. Consideration should only be given if the system's maximum operating frequency is definitively below 12 GHz; otherwise, there is a risk to system performance.

2. SA26B-20 Substitution Conclusion The SA26B-20 is a fully viable and superior direct replacement for the original component. Its most critical feature is an extended operating frequency range up to 26 GHz, which fully covers and exceeds the original requirement of 18 GHz. Across the entire original application bandwidth, its electrical performance (e.g., attenuation accuracy, VSWR) is guaranteed with ample margin, even providing headroom for potential future system upgrades. With all other key parameters (20dB attenuation, 2W power handling, 50Ω impedance, connector type) being identical, this part operates under a "derated" condition from its specifications. The substitution is therefore reliable and carries no technical risk.

Analysis ID: 7FDE-8D77000

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