SA3S5W-30 Replacement: SA6S5W-30, FMAT7460-30

Original Part

SA3S5W-30

Fairview Microwave

RF Attenuators 30dB 0 Hz ~ 3 GHz 50 Ohms 5W SMA In-Line Module

Alternative Part

SA6S5W-30

Fairview Microwave

RF Attenuators 30dB 0 Hz ~ 6 GHz 50 Ohms 5W SMA In-Line Module

FMAT7460-30

Fairview Microwave

RF Attenuators 30dB 0 Hz ~ 12.4 GHz 50 Ohms 5W SMA In-Line Module

1. SA6S5W-30 Substitution Conclusion From a core parameter perspective, the SA6S5W-30 can directly replace the original SA3S5W-30. Both parts share identical attenuation value, power handling capacity, impedance, and interface type. The key difference lies in the operational frequency range: the SA6S5W-30 covers 0-6 GHz, which is wider than the original part's 0-3 GHz range. By fully encompassing the original part's application spectrum, the SA6S5W-30 gains the capability to function normally at higher frequencies (3-6 GHz). This necessarily implies optimizations in its internal circuit design and materials to maintain performance metrics—such as VSWR and attenuation accuracy—across the broader bandwidth. For applications originally designed not to exceed 3 GHz, this substitution is not only feasible but represents an "upgraded" direct replacement with greater performance margin.

2. FMAT7460-30 Substitution Conclusion The FMAT7460-30 can functionally replace the original SA3S5W-30 in terms of basic parameters, but this constitutes an "over-spec" substitution. The most critical technical distinction is its frequency range (0-12.4 GHz), which far exceeds the original part's 3 GHz upper limit. The FMAT7460-30 is engineered for microwave band applications (notably C and X bands). Its internal components, structure, and tuning are all dedicated to maintaining superior RF performance (e.g., low VSWR, high attenuation accuracy) at frequencies up to 12.4 GHz. While it will operate correctly within the original part's sub-3GHz range, you are likely paying a premium for this ultra-wideband capability. Electrically, the substitution is viable. However, from a cost-benefit standpoint, it is only recommended if there is a future system requirement to expand into higher frequency bands, or if this part offers significant advantages in procurement or inventory management.

Analysis ID: A6A1-E6A1000

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