LCAT1000-12 Replacement: AT-112V, M3933/25-38S

Original Part

LCAT1000-12

L-com

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

Alternative Part

AT-112V

Hirose Electric Co Ltd

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

M3933/25-38S

Amphenol SV Microwave

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

1. AT-112V Substitution Conclusion The AT-112V can fully replace the original part LCAT1000-12. All key parameters—attenuation value (12 dB), impedance (50 Ω), power rating (2 W), and interface type (SMA in-line module)—are identical. The primary difference lies in the frequency range: the AT-112V covers 0–18 GHz, significantly wider than the original part’s 0–6 GHz. The AT-112V maintains specified performance up to 18 GHz, whereas the original part is limited to applications below 6 GHz. Within the common 0–6 GHz band, the AT-112V will fully meet or likely exceed the performance of the original unit. Due to its wider frequency margin, the AT-112V typically offers better stability and accuracy at lower frequencies. No compatibility issues are expected from the substitution; only potential cost differences should be considered.

2. M3933/25-38S Substitution Conclusion The M3933/25-38S is a complete drop-in replacement for the original LCAT1000-12. Core specifications—12 dB attenuation, 50 Ω impedance, 2 W power handling, and SMA in-line module form—are exactly the same. The key improvement is the extended frequency range of 0–18 GHz, compared to the original’s 0–6 GHz. With its wider operational bandwidth, the M3933/25-38S not only satisfies all original requirements below 6 GHz but also provides additional margin for high-frequency performance, making it suitable for more demanding or frequency‑extended applications. Direct electrical and mechanical compatibility ensures a straightforward replacement. However, attention should be paid to potential differences in reliability standards or cost resulting from the change in manufacturer.

Analysis ID: 5DF1-F0D2000

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