Widely used in industrial DC power supplies, welding machine auxiliary circuits, high-power battery chargers, solar inverter equipment, high-power LED street light power, air-compressor control power and equipment-room DC supply. Features mounting holes for heat-sink fixation, suitable for heavy-current rectification and continuous industrial operation with strong surge-current resistance; heat-sink installation required for long-term reliability. This model is rated 25A / 1000V, a high-power class device suitable for mains / high-voltage applications.