LCAT1001-01 Replacement: AT-101V, M3933/30-03N

Original Part

LCAT1001-01

L-com

RF Attenuators 1dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-101V

Hirose Electric Co Ltd

RF Attenuators 1dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/30-03N

Amphenol SV Microwave

RF Attenuators 1dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

1. AT-101V Substitution Conclusion From the perspective of core electrical parameters and mechanical interface, the AT-101V can serve as a direct replacement for the original part, LCAT1001-01. Both components are identical in terms of attenuation value (1 dB), power handling (2 W), nominal impedance (50 Ω), and interface type (SMA In-Line Module). The key difference lies in the frequency range: the AT-101V covers DC-18 GHz, which is significantly wider than the original part's DC-3 GHz range. The AT-101V's performance in the higher frequency bands—including attenuation flatness and VSWR—has been optimized and verified, enabling it to cover and exceed the operational bandwidth of the original part. For applications at or below 3 GHz, this discrepancy is typically not an issue; in fact, the component offers wider performance margins at lower frequencies. However, during actual substitution, it is essential to verify that the attenuation accuracy and VSWR across the entire operational band—particularly at frequencies critical to the user's system—meet the specific circuit requirements.

2. M3933/30-03N Substitution Conclusion The M3933/30-03N is functionally feasible as a replacement for the original LCAT1001-01, with matching specifications for attenuation, power handling, impedance, and interface. The primary technical distinction is again the frequency range: the M3933/30-03N supports DC-32 GHz, positioning it as a high-performance attenuator designed for millimeter-wave applications. This part offers superior performance in ultra-wideband and high-frequency microwave systems. However, using it in a system originally specified for only 3 GHz bandwidth constitutes an "over-spec" replacement. It should be noted that such ultra-wideband components may exhibit slight deviations in baseline performance parameters at lower frequencies—such as absolute attenuation accuracy—due to different design optimization priorities compared to the original part. They also typically come at a higher cost. Substitution is viable for systems operating below 3 GHz, but it is recommended to confirm that key parameters at the specific application frequencies—such as attenuation deviation and VSWR—comply with system accuracy requirements, and to evaluate whether the associated cost is acceptable.

Analysis ID: 95DF-AC07000

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