1. ACML-0603U-700-T Substitution Conclusion The ACML-0603U-700-T can generally serve as a replacement for the original part, though attention must be paid to its impedance deviation: the substitute exhibits an impedance of 70Ω @ 100MHz, compared to 60Ω @ 100MHz for the original part (a difference of approximately 16.7%). At the same frequency, the substitute provides slightly stronger suppression of high‑frequency noise, which may cause a minor shift in the filter response curve. If the original circuit is sensitive to impedance tolerance—for instance, where strict noise attenuation at a specific frequency is required—actual filtering performance should be evaluated. All other key parameters (rated current 4A, DCR 20mΩ, 0603 package) remain identical, so there is no difference in DC power handling or loss. For most general‑purpose power‑filtering applications, direct substitution is acceptable; however, in designs with precise requirements for noise‑suppression frequency characteristics, circuit performance verification is recommended.