SA26B-01 Replacement: AT-101V, M3933/30-03N

Original Part

SA26B-01

Fairview Microwave

RF Attenuators 1dB 0 Hz ~ 26 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 The feasibility of using the AT-101V as a direct replacement is conditional, with its key limitation being the frequency range. Compared to the original part (0–26 GHz), the AT-101V has an upper operating frequency limit of 18 GHz. Within the 18–26 GHz band, key performance parameters such as attenuation accuracy and VSWR may not be guaranteed. This could introduce additional insertion loss and signal reflection, leading to degraded or even failed system performance at higher frequencies. Substitution is acceptable only if the actual operating frequency of the application system is confirmed to remain below 18 GHz; otherwise, it is not recommended.

2. M3933/30-03N Substitution Conclusion The M3933/30-03N is highly feasible as a replacement for the original part in terms of core electrical parameters and offers superior performance. Its main technical advantages include a broader operating frequency range (0–32 GHz), which fully covers and exceeds the original part’s 26 GHz requirement. Across the entire operating band of the original component, the M3933/30-03N provides specified attenuation accuracy and good impedance matching, with greater performance margin at the high‑frequency end. It typically also meets higher design and manufacturing standards and offers better high‑frequency consistency. From a performance standpoint, it is an ideal upgrade replacement option.

Analysis ID: 5DA6-C774000

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