1. 3.0SMCJ58A_R1_00001 Substitution Conclusion The 3.0SMCJ58A_R1_00001 (Panjit International Inc.) exhibits strong alignment with the original part, SMDJ58A (Littelfuse Inc.), across key parameters. These include a reverse standoff voltage of 58V, a breakdown voltage of 64.4V, a clamping voltage of 93.6V, and a peak pulse power rating of 3000W. Both devices share the DO-214AB (SMC) package, enabling them as direct substitutes. A minor deviation exists in the peak pulse current, rated at 32A for the substitute versus 32.1A for the original. This slight discrepancy (~0.3%) is likely attributable to manufacturing tolerances or differing test standards. In practice, this difference is generally negligible for standard overvoltage protection performance. However, it may result in a marginally reduced design margin under extreme transient current conditions. Therefore, it is recommended for use in non-critical or medium-to-low risk circuits, with verification of system tolerance advised.