LCAT1000-03 Replacement: AT-103V, M3933/30-07N

Original Part

LCAT1000-03

L-com

RF Attenuators 3dB 0 Hz ~ 6 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 The AT-103V is electrically equivalent to the original LCAT1000-03 in all key parameters—3dB attenuation, 2W power handling, 50Ω impedance, and SMA interface—making it a viable drop-in replacement. The primary distinction lies in its extended operational frequency range of 0–18 GHz, significantly wider than the original’s 0–6 GHz. This improvement is achieved through enhanced internal circuit design and more precise manufacturing processes, ensuring accurate attenuation, excellent impedance matching (low VSWR), and maintained power capability across the broader bandwidth. For applications originally operating below 6 GHz, the AT-103V is fully compatible and offers additional frequency margin, potentially improving the system’s high‑frequency performance. It can be considered an equivalent or even superior substitute under derated conditions.

2. M3933/30-07N Substitution Conclusion The M3933/30-07N also matches the original part in fundamental specifications—attenuation, power rating, impedance, and interface—allowing for direct physical and functional substitution. Its standout feature is an exceptionally wide frequency range of 0–32 GHz. This extreme bandwidth suggests the use of advanced microwave materials (e.g., high‑performance substrate), tight tolerance control, and ruggedized processes and testing standards, likely compliant with military or aerospace requirements as indicated by its MIL‑style part number. In systems originally designed for ≤6 GHz operation, this part provides substantial frequency margin, with expected excellent stability and consistency at high frequencies. Such over‑specification may come at a higher cost. This component represents a reliable replacement that not only meets but potentially exceeds the original part’s electrical requirements, making it particularly suitable for applications with stringent high‑frequency demands or possible future bandwidth upgrades.

Analysis ID: B38C-9B06000

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