LCAT1005-07 Replacement: AT-107V, M3933/25-33S

Original Part

LCAT1005-07

L-com

RF Attenuators 7dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-107V

Hirose Electric Co Ltd

RF Attenuators 7dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/25-33S

Amphenol SV Microwave

RF Attenuators 7dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. AT-107V Substitution Conclusion Based on the provided key electrical parameters (7dB attenuation, DC-18GHz frequency range, 2W power handling, 50Ω impedance, SMA connectors), the Hirose AT-107V is a direct functional match to the original L-com part, making it a viable drop-in replacement. The primary distinction lies in the different manufacturers, which may lead to subtle variations in internal circuit design, material selection (e.g., resistive chips, substrate), and manufacturing processes. These differences typically manifest in unspecified "implied" performance metrics such as insertion loss, VSWR, power handling temperature coefficient, and long-term stability. For most general-purpose commercial applications, the AT-107V serves as a qualified substitute. However, in scenarios with stringent requirements for lot-to-lot consistency, performance under extreme environmental conditions, or specific brand compatibility (e.g., within a calibrated test system), it is recommended to validate the overall system performance after substitution.

2. M3933/25-33S Substitution Conclusion The Amphenol SV Microwave M3933/25-33S matches the original part's core electrical specifications (7dB, DC-18GHz, 2W, 50Ω, SMA), satisfying the basic criteria for substitution. Its most significant technical differentiator is the "M3933" prefix in its part number, which explicitly denotes compliance with the MIL-PRF-3933 military performance specification. This part adheres to a far more rigorous and standardized quality control regime than commercial-grade products (like the original L-com or Hirose parts) concerning materials, workmanship, testing, and reliability (e.g., temperature range, vibration, shock, salt spray). Consequently, the M3933/25-33S is expected to offer superior performance stability and long-term reliability in harsh environments, albeit typically at a higher cost and with longer lead times. It is not only a feasible electrical substitute but also the preferred upgrade path for high-reliability, military-grade applications. Its use in standard commercial applications, however, may incur unnecessary cost overhead.

Analysis ID: 1AE2-DE59000

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