1. Reverse Leakage Current (Ir): The SB130AS specifies 45µA @30V, while the SS1030 specifies 50µA @30V. This is the only quantifiable electrical parameter difference. The reverse blocking characteristic of the SS1030 is marginally inferior to that of the SB130AS. However, the absolute difference of 5µA is negligible in practical circuits, especially under a typical 1A forward current. This parameter warrants slight consideration only in applications critically sensitive to ultra-low power consumption or operating under extreme high-temperature/high-voltage conditions. 2. Part Number & Cost: Both are from the same manufacturer (Panjit) but carry different part numbers with a significant price gap (the SS1030 is priced at approximately 46% of the SB130AS). They likely belong to different internal product series or cost tiers within the manufacturer's portfolio. The SS1030 likely represents a more cost-optimized structure or a later-generation process refinement. It maintains equivalent core performance (Vf, Io, Vr) while relaxing the specification limits for a non-critical secondary parameter (Ir) to reduce cost, making it a typical "cost-performance" variant. Conclusion: It is recommended to adopt the SS1030 as a replacement. Initial implementation should involve a small-batch verification test within a production lot, focusing on actual temperature rise and efficiency. If no anomalies are observed, a full-scale switchover can proceed.