1. FMAT7620-12 Substitution Conclusion Based on comparative analysis, the FMAT7620-12 is a fully compatible direct replacement for the original AT-112V part in terms of core electrical performance parameters. The key specifications of both attenuators are identical, including attenuation value (12 dB), frequency range (DC to 18 GHz), rated power (2 W), characteristic impedance (50 Ω), and connector type (SMA straight plug-in module). This strict alignment of parameters ensures that, in the vast majority of RF signal chains, the two devices will perform with no substantive difference in signal attenuation, power handling, bandwidth, or impedance matching. The primary distinctions lie in the manufacturer (Fairview Microwave versus Hirose), which affects the supply chain, price, and perceived brand reliability. However, these factors do not impact technical interchangeability. If there is no specific brand requirement, the FMAT7620-12 represents a viable alternative.