1.74279261 Substitution Conclusion From a key technical parameter perspective, the 74279261 matches the original part in critical characteristics (impedance @ frequency, rated current, and package dimensions). However, two deviations exist: its DC resistance (DCR) is 300mΩ, which is higher than the original's 160mΩ. This results in greater power loss and voltage drop under identical operating current, potentially impacting power supply efficiency or signal integrity. Additionally, its maximum height is slightly greater (1.00mm vs. 0.95mm), requiring verification of mechanical compatibility in applications with stringent height constraints. Substitution should be approached with caution if the circuit is sensitive to DCR or has critical layout height limitations. Otherwise, it can serve as a direct replacement in general signal filtering applications. 2.MLB05-800-RC Substitution Conclusion The MLB05-800-RC fully matches the original part in impedance @ frequency and package dimensions. Furthermore, it offers superior performance with a higher rated current (300mA vs. 200mA) and a lower DC resistance (150mΩ vs. 160mΩ). Under identical operating conditions, it can handle higher current with lower associated power loss. Its height is identical to the original (0.95mm), ensuring good mechanical compatibility. This part meets or exceeds the original in both electrical performance and physical dimensions, making it a suitable direct replacement. It is particularly well-suited for applications requiring higher current handling or lower power loss.