FMAT7620-10 Replacement: LCAT1001-10, LCAT1000-10

Original Part

FMAT7620-10

Fairview Microwave

RF Attenuators 10dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

LCAT1001-10

L-com

RF Attenuators 10dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

LCAT1000-10

L-com

RF Attenuators 10dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

1. LCAT1001-10 Substitution Conclusion The LCAT1001-10 is not a direct substitute for the FMAT7620-10. The key difference lies in its frequency range, which is limited to 0–3 GHz—significantly narrower than the original part’s 0–18 GHz. In applications exceeding 3 GHz (such as C-band, X-band, Ku-band, and other common microwave bands), the attenuation value of this attenuator will deviate substantially from the nominal 10 dB. Moreover, insertion loss and VSWR performance will degrade noticeably, compromising signal integrity and power level control across the RF link. Consequently, it cannot meet the requirements of broadband systems.

2. LCAT1000-10 Substitution Conclusion The LCAT1000-10 can conditionally replace the FMAT7620-10, provided the system operates at frequencies no higher than 6 GHz. The primary distinction remains the frequency range (0–6 GHz versus 0–18 GHz). Below 6 GHz, the LCAT1000-10 delivers attenuation accuracy and matching performance comparable to the original part. However, for any circuit operating between 6 GHz and 18 GHz, its performance cannot be guaranteed. This may result in insufficient high-frequency attenuation and increased reflection. Therefore, it is only suitable for specific mid-to-low frequency applications (such as cellular communications and Wi-Fi 2.4/5 GHz) and is not recommended for broader bandwidths or general-purpose testing across unknown frequency bands.

Analysis ID: 4423-79B8000

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