Original Part
Alternative Part
1. AT-112V Substitution Conclusion
The AT-112V matches the original part FMAT7611-12 in all nominal core electrical parameters (12 dB attenuation, DC‑18 GHz frequency range, 50 Ω impedance, 2 W power rating) and physical interface (SMA‑through package), making it theoretically suitable as a direct replacement. The key distinction lies in the different manufacturers (Hirose versus Fairview), which may lead to variations in secondary characteristics not explicitly listed in the datasheet—such as attenuation accuracy (tolerance), temperature coefficient, VSWR versus frequency response, and long‑term power handling (notably temperature rise under average power). In practical applications, if the circuit demands tight attenuation flatness or phase consistency, detailed specifications should be compared. For general broadband matching or power‑leveling purposes, this part offers a viable substitution.
2. M3933/25-38S Substitution Conclusion
The M3933/25-38S likewise aligns with the original part in basic specifications (12 dB, DC‑18 GHz, 50 Ω, 2 W, SMA‑through), providing a foundation for direct replacement. The primary difference is the manufacturer—Amphenol SV Microwave—and the fact that the part number suggests compliance with a military standard (MIL‑DTL‑3933) or potentially higher environmental reliability grades (e.g., operating temperature range, vibration resistance). However, the “M3933” designation indicates it likely falls under a military‑grade system, which differs from the original commercial‑grade product in terms of testing standards, quality assurance, and cost. For commercial or industrial applications, this part may be “over‑specified” yet functionally compatible. In high‑reliability fields, it could offer a superior alternative, provided its specific certification level meets the system requirements.
Analysis ID: 8C74-BBAB000
Based on part parameters and for reference only. Not to be used for procurement or production.
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