M3933/30-33S Replacement: AT-120V, M3933/14-04S

Original Part

M3933/30-33S

Amphenol SV Microwave

RF Attenuators 20dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-120V

Hirose Electric Co Ltd

RF Attenuators 20dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/14-04S

Amphenol SV Microwave

RF Attenuators 20dB 0 Hz ~ 12.4 GHz 50 Ohms 2W SMA In-Line Module

1. AT-120V Substitution Conclusion The AT-120V differs only in its frequency range, with an upper operating frequency limit of 18 GHz, which is lower than the original part's 32 GHz. If your application operates below 18 GHz, the AT-120V serves as a viable, fully compatible substitute, matching both the electrical performance and mechanical interface. However, for systems handling signals in the 18 GHz to 32 GHz band, using the AT-120V will result in severe performance degradation or complete failure of the attenuator. Therefore, it is not a suitable replacement in such high-frequency scenarios.

2. M3933/14-04S Substitution Conclusion The key difference for the M3933/14-04S also lies in its frequency range, with an upper limit of only 12.4 GHz, significantly lower than the original part's 32 GHz. This part is suitable only for lower-frequency applications, such as those within the C-band and below. For signals in the Ku-band, K-band, or higher frequencies covered by the original design, this attenuator cannot provide the specified 20 dB attenuation. This may lead to abnormal system performance or damage to downstream sensitive components. Consequently, it is entirely unsuitable as a substitute in applications involving these higher frequencies.

Analysis ID: 9686-E2A2000

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