SA6H-12 Replacement: AT-112V, M3933/25-38S

Original Part

SA6H-12

Fairview Microwave

RF Attenuators 12dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-112V

Hirose Electric Co Ltd

RF Attenuators 12dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

M3933/25-38S

Amphenol SV Microwave

RF Attenuators 12dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. AT-112V Substitution Conclusion From the perspective of core electrical and mechanical parameters, the AT-112V can directly replace the SA6H-12. The key difference lies in the frequency range (0-18 GHz for the AT-112V, significantly exceeding the 0-6 GHz range of the SA6H-12). Within the original design's operating band (≤6 GHz), the substitute will not only fully meet performance requirements but also provide substantial frequency margin, potentially yielding superior high-frequency stability and consistency. Furthermore, both components share identical attenuation values, power handling capacity, impedance, and interface type, ensuring functional equivalence and physical installation compatibility within the circuit.

2. M3933/25-38S Substitution Conclusion The M3933/25-38S is also electrically viable as a direct substitute for the SA6H-12. Its critical parameters align with those of the AT-112V, with the primary distinction again being its wider frequency range (0-18 GHz). This indicates it would be operating "derated" within applications at 6 GHz and below, typically offering more stable performance and increased design margin. Additionally, its part number (M3933/25-38S) suggests potential compliance with military standards or more rigorous reliability screening. In harsh environments or applications demanding high reliability, it may provide superior long-term stability and environmental robustness compared to the original commercial-grade component.

Analysis ID: 934E-FE8E000

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