LCAT1002-03 Replacement: AT-103V, M3933/30-07N

Original Part

LCAT1002-03

L-com

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

Alternative Part

AT-103V

Hirose Electric Co Ltd

RF Attenuators 3dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/30-07N

Amphenol SV Microwave

RF Attenuators 3dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

1. AT-103V Substitution Conclusion From the perspective of core electrical parameters and mechanical interfaces, the AT-103V is a fully viable direct replacement for the original LCAT1002-03. Both components are identical in key specifications: attenuation value (3dB), power handling (2W), impedance (50Ω), and connector type (SMA In-Line). The primary difference lies in the frequency range; the AT-103V (0-18 GHz) far exceeds the original part's 3 GHz upper limit. Within the original design's operating band of 3 GHz and below, the AT-103V's performance—including attenuation accuracy and VSWR—is typically superior to or at least equal to that of the original part. This constitutes a "derated" application, thereby providing greater performance margin and reliability. The AT-103V is a qualified drop-in replacement. Its wider bandwidth can be viewed as a performance upgrade, though potential cost implications compared to the original part should be considered.

2. M3933/30-07N Substitution Conclusion The M3933/30-07N also serves as a high-performance alternative to the original LCAT1002-03. Its fundamental parameters (3dB, 2W, 50Ω, SMA) are a perfect match. The most significant difference, again, is its exceptionally wide operational frequency range (0-32 GHz), which greatly exceeds the original requirement of 3 GHz. This component employs higher-grade microwave design, materials, and manufacturing processes to maintain excellent performance even into millimeter-wave frequencies. When used within the 3 GHz band, this high-performance design typically results in lower insertion loss variation (a flatter attenuation curve) and improved impedance matching (better VSWR), thereby enhancing overall system performance stability in this frequency range. Technically, the M3933/30-07N is an excellent substitute, particularly suited for applications demanding higher performance margins and long-term reliability. However, as a military-specification (inferred from the M3933 prefix) or high-performance product, it likely carries the highest cost.

Analysis ID: E41F-624D000

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