AT-109V Replacement: LCAT1002-09, LCAT1001-09

Original Part

AT-109V

Hirose Electric Co Ltd

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

Alternative Part

LCAT1002-09

L-com

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

LCAT1001-09

L-com

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

1. LCAT1002-09 Substitution Conclusion The feasibility of substituting the original AT-109V with the LCAT1002-09 is limited, primarily due to a significant difference in frequency range. The AT-109V supports a broad bandwidth from 0 Hz to 18 GHz, whereas the LCAT1002-09 is only rated for 0 Hz to 3 GHz. Consequently, the LCAT1002-09 is suitable only for lower-frequency RF applications. If the system operates above 3 GHz (e.g., entering the microwave bands), this part may fail to provide accurate attenuation performance, leading to signal distortion, degraded efficiency, or potential device damage due to impedance mismatch. Other key parameters—including attenuation value (9dB), power handling (2W), impedance (50Ω), and package (SMA In-Line Module)—are identical. Therefore, the LCAT1002-09 can serve as a substitute in scenarios where the operational frequency does not exceed 3 GHz. However, this substitution is strictly conditional on the application's frequency requirements remaining within this limit; otherwise, it is not recommended.

2. LCAT1001-09 Substitution Conclusion Similarly, the feasibility of substituting the original AT-109V with the LCAT1001-09 is constrained. The core discrepancy lies in the frequency range: the AT-109V covers 0 Hz to 18 GHz, while the LCAT1001-09 is limited to 0 Hz to 3 GHz. At frequencies above 3 GHz, the attenuation characteristics of the LCAT1001-09 may become unstable or ineffective, failing to meet the performance requirements of broadband systems and thus compromising signal integrity and system reliability. Although other parameters—such as attenuation (9dB), power rating (2W), impedance (50Ω), and package type (SMA In-Line Module)—are consistent with the AT-109V, ensuring good physical and electrical compatibility in low-frequency applications (≤3 GHz), the overall substitutability is entirely dependent on the specific application frequency. For systems involving the 18 GHz band, the LCAT1001-09 is not a viable substitute, and a part with a matching frequency range must be selected.

Analysis ID: 17B9-1785000

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