LCAT1001-09 Replacement: AT-109V, M3933/25-35S

Original Part

LCAT1001-09

L-com

RF Attenuators 9dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-109V

Hirose Electric Co Ltd

RF Attenuators 9dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/25-35S

Amphenol SV Microwave

RF Attenuators 9dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. AT-109V Substitution Conclusion The AT-109V can fully replace the LCAT1001-09, with a theoretical performance advantage. The core parameters of both attenuators—attenuation value (9dB), impedance (50Ω), power rating (2W), and connector type (SMA)—are identical. This ensures direct electrical and mechanical interchangeability within the original design frequency band (DC-3GHz). The difference lies in the AT-109V’s significantly wider frequency range (DC-18GHz) compared to the original part (DC-3GHz). The AT-109V employs a design and materials optimized for higher frequencies, which can provide improved frequency response flatness and phase stability within the application band up to 3GHz. Additionally, it offers headroom for potential future system frequency upgrades. This difference constitutes a positive enhancement and poses no risk to the existing application.

2. M3933/25-35S Substitution Conclusion The M3933/25-35S can fully replace the LCAT1001-09 and may offer advantages in performance and reliability. Both parts share identical key electrical specifications (9dB, 50Ω, 2W) and mechanical interface (SMA), ensuring direct replacement feasibility. Similar to the previous case, the primary difference is a wider operating frequency range (DC-18GHz vs. DC-3GHz), indicating superior high-frequency performance. Furthermore, a notable implicit difference is that the manufacturer, Amphenol SV Microwave, typically serves the high-end military (MIL) sector. The part number "M3933" suggests potential compliance with relevant military standards or more stringent testing and reliability qualifications, which are not indicated for the original part. The M3933/25-35S likely adheres to higher standards for environmental robustness, long-term stability, and lot-to-lot consistency, making it suitable for more demanding applications.

Analysis ID: 4107-3A3E000

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