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

Original Part

M3933/14-04S

Amphenol SV Microwave

RF Attenuators 20dB 0 Hz ~ 12.4 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

M3933/30-33N

Amphenol SV Microwave

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

1. AT-120V Substitution Conclusion From a core electrical performance perspective, the AT-120V is a qualified and superior direct substitute for the original M3933/14-04S part. Both devices share identical key parameters (20dB attenuation, 50Ω impedance, 2W power, SMA interface), ensuring basic functional drop-in replacement. The primary difference lies in the AT-120V's extended frequency range of 0-18 GHz, which significantly surpasses the original's 12.4 GHz limit. Substituting with the AT-120V not only fully covers the original application's frequency band but also provides the system with greater frequency margin and potential upgrade headroom. Its performance at higher frequencies (e.g., VSWR, attenuation flatness) is likely superior. However, verification is required to confirm that its mechanical dimensions and installation details from manufacturer Hirose are fully compatible with the original Amphenol variant.

2. M3933/30-33N Substitution Conclusion The M3933/30-33N represents a high-performance, same-brand upgrade path from the original part. As part of the Amphenol SV Microwave family alongside the original, it shares the same core specifications (20dB, 50Ω, 2W, SMA) and benefits from consistent brand quality standards. The most critical technical enhancement is its frequency range, extending up to 0-32 GHz. This far exceeds the original 12.4 GHz and even the AT-120V's 18 GHz capability. The M3933/30-33N offers assured performance into the millimeter-wave bands, making it suitable for more advanced high-frequency applications such as 5G, satellite communications, and high-end test systems. As an in-family product, it likely provides higher consistency in design, materials, and workmanship. It is the ideal substitute for scenarios demanding ultimate frequency performance and requiring strict brand continuity.

Analysis ID: 7023-4D35000

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