1. GZ1005U601CTF Substitution Conclusion Based on key electrical parameters (impedance, rated current, DC resistance) and package dimensions, the GZ1005U601CTF is identical to the original part ACML-0402H-601-T, enabling direct substitution in terms of physical compatibility and basic filtering performance. The primary difference lies in the "Filter Type": the original part is designated for "Power Line" applications, while the GZ1005U601CTF is specified for "Signal Line" use. The core material and design of the GZ1005U601CTF are optimized for filtering low-current signals. Although its rated current is also specified at 300mA, when applied in circuits such as power lines with significant DC bias, its performance in impedance attenuation under high load current, temperature rise, and magnetic saturation characteristics may be less stable and reliable compared to the original part, which is specifically designed for power path applications. If used for noise suppression at power input stages or in power paths, direct substitution carries certain performance risks. However, for filtering pure signal lines (e.g., data lines, clock lines), the substitution is highly feasible. It is recommended to conduct practical measurements based on the operating current and filtering requirements in the specific application circuit prior to replacement.