SA26B-08 Replacement: M3933/30-17S, SA18E-08

Original Part

SA26B-08

Fairview Microwave

RF Attenuators 8dB 0 Hz ~ 26 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

M3933/30-17S

Amphenol SV Microwave

RF Attenuators 8dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

SA18E-08

Fairview Microwave

RF Attenuators 8dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. M3933/30-17S Substitution Conclusion From a core electrical parameter standpoint, the M3933/30-17S can serve as a complete drop-in replacement for the original SA26B-08 part. Both components share identical specifications for attenuation (8 dB), impedance (50 Ω), power handling (2 W), and connector interface (SMA In-Line Module). The key difference lies in the frequency range: the M3933/30-17S covers 0–32 GHz, which is superior to the original part's 0–26 GHz. This gives the substitute broader applicability and greater performance margin at higher frequencies. For applications up to 26 GHz, the replacement can be made directly with no risk of performance degradation, making it a functionally equivalent and performance-enhanced alternative.

2. SA18E-08 Substitution Conclusion The SA18E-08 is a conditional and potentially degraded substitute for the original SA26B-08. While both parts match in attenuation, impedance, power rating, and connector type, a critical discrepancy exists in their frequency ranges: the SA18E-08 is rated only for 0–18 GHz, significantly narrower than the original's 0–26 GHz. If the operating frequency exceeds 18 GHz, this substitute will not function properly, leading to severe deterioration or complete failure of the attenuation performance. Therefore, it can only be safely used in applications operating at or below 18 GHz. Deploying it directly in a system designed for 26 GHz would constitute a non-compliant substitution.

Analysis ID: 0D71-080D000

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