Original Part
Alternative Part
1. AT-110V Substitution Conclusion
Based on core electrical parameters (10 dB attenuation, 50 Ω impedance, 2 W power) and mechanical interface (SMA straight-through), the AT-110V is directly compatible with and can replace the original SA3R-10 part. The key difference lies in its extended frequency range up to 18 GHz, which is significantly wider than the original part's 3 GHz. The AT-110V typically offers optimized performance with additional margin in attenuation accuracy, VSWR, and other characteristics at higher frequencies, ensuring equal or better performance in applications below 3 GHz. However, note that its wider bandwidth design may result in slightly higher cost. After replacement, verification in the actual circuit is recommended to ensure no anomalies.
2. M3933/30-21N Substitution Conclusion
The M3933/30-21N also meets the basic specifications (10 dB, 50 Ω, 2 W, SMA) for direct replacement of the SA3R-10. Its most significant technical advantage is the substantial increase in upper frequency limit to 32 GHz, indicating enhanced internal design and material technology tailored for millimeter-wave operation. Typically, it exhibits very low frequency sensitivity and more stable performance within 3 GHz. Such ultra-wideband, high-performance components often come at a higher unit cost. Moreover, as a product from Amphenol SV Microwave, it is commonly oriented toward high-reliability or military applications. If the original application is only for general commercial low-frequency scenarios, there may be an over-specification of performance. Prior to substitution, a cost-benefit analysis and measurement of key parameters in the actual circuit are advised.
Analysis ID: 0CC9-0311000
Based on part parameters and for reference only. Not to be used for procurement or production.
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