LCAT1002-08 Replacement: AT-108V, M3933/25-34S

Original Part

LCAT1002-08

L-com

RF Attenuators 8dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-108V

Hirose Electric Co Ltd

RF Attenuators 8dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/25-34S

Amphenol SV Microwave

RF Attenuators 8dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. AT-108V Substitution Conclusion From a core electrical parameter standpoint, the AT-108V is a fully viable substitute for the original LCAT1002-08 part. Both units are identical in key specifications—attenuation value (8dB), impedance (50Ω), rated power (2W), and connector interface (SMA In-Line Module)—ensuring basic functional interchangeability. The difference lies in the frequency range: the original part supports DC-3 GHz, whereas the AT-108V supports DC-18 GHz. The AT-108V offers significantly extended high-frequency capability. Performance is equivalent up to 3 GHz, but beyond this range (3-18 GHz), the AT-108V maintains its specified attenuation accuracy and impedance matching, while the original part's performance may degrade or become unusable. For applications operating at or below 3 GHz, the AT-108V is a direct, performance-equivalent drop-in replacement with added margin. If the system involves higher frequencies, the AT-108V becomes a necessary upgrade.

2. M3933/25-34S Substitution Conclusion The M3933/25-34S also presents a fully viable substitution for the original LCAT1002-08 part. Its core parameters (8dB, 50Ω, 2W, SMA interface) are an exact match, guaranteeing direct replacement of the basic attenuation function. Similar to the AT-108V, the primary difference is frequency range: the M3933/25-34S supports DC-18 GHz, substantially wider than the original part's DC-3 GHz. Within the user system's maximum operating frequency (assuming ≤3 GHz), the M3933/25-34S not only meets requirements but, due to its wider design bandwidth, typically offers superior attenuation flatness and Voltage Standing Wave Ratio (VSWR) performance across the specified band. Furthermore, the manufacturer, Amphenol SV Microwave, typically specializes in high-reliability and military-grade products (the "M3933" designation suggests potential compliance with MIL standards). This part likely offers advantages over standard commercial-grade (L-com) products in terms of environmental robustness, long-term stability, and lot-to-lot consistency, though potentially at a higher cost. Electrically, it is a high-performance substitute and becomes the advantageous choice in applications demanding high reliability.

Analysis ID: 19E9-29EB000

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