1. Current Rating: SDC7 is rated at 30A, while 01050003H is rated at 15A. The current‑carrying capability of 01050003H is halved. If used in high‑current circuits (>15A), it may lead to overheating, premature fuse operation, or safety hazards. A rigorous evaluation of the application’s current demand is essential. 2. Mounting Type: SDC7 employs chassis mounting, whereas 01050003H uses through‑hole mounting. Chassis mounting generally offers better heat dissipation and mechanical stability, making it suitable for high‑power or vibration‑prone environments. Through‑hole mounting is standard for PCB‑based designs; substitution may require redesign of the mounting structure or thermal management approach. 3. Voltage Rating: 01050003H is explicitly rated for 600V, while SDC7 does not specify a voltage rating. The higher voltage rating of 01050003H extends its suitability in high‑voltage circuits. However, if SDC7 was originally used in low‑voltage scenarios (<600V), this difference does not affect functionality. Conversely, if SDC7 implied a higher voltage requirement, compatibility must be verified. 4. Contact Material and Finish: 01050003H specifies spring brass contacts with tin plating, whereas SDC7 does not specify. 01050003H may offer advantages in conductivity, spring resilience, and corrosion resistance, contributing to long‑term contact stability and soldering reliability. The unspecified material of SDC7 may introduce performance variability risks.