One piece unit: 300A car Total Power Switch Relay, Excavator Special Relay, Peak 600A, 12/24VDC, Size : 12V300A The Total Power Switch Relay is a current switching device designed for automotive and heavy equipment use. It provides reliable control of main power circuits with a strong emphasis on safety and durability in demanding environments. Key benefits current capability: continuous rating 300A with peak capability up to 600A, suitable for powering and protecting heavy loads. Versatile power control: acts as a total power switch to isolate or supply the main electrical system in vehicles or machinery. 12/24V DC operation: designed for common automotive and construction equipment electrical systems, compatible with both 12V and 24V setups. Excavator application: described as an Excavator Special Relay, making it well suited for heavy equipment and similar power requirements. Clear size designation: Size listed as Size : 12V300A, aiding in selection and installation in constrained electrical layouts. Key attributes Functionality: total power switch relay capable of handling current to main circuits and accessories. Compatibility: suitable for car use and heavy machinery environments requiring a reliable current switch in a 12/24V DC system. Size: Size : 12V300A. Performance: designed for stability under current demands and capable of peak currents up to 600A. Applications and use cases Automotive main power switch: serve as the primary disconnect for the battery or main power distribution in cars, trucks, and other light vehicles, enabling safe maintenance and quick isolation. Heavy equipment and excavators: act as the main relay for power to critical systems or draw accessories on excavators and other construction machinery. Aftermarket accessory power control: provide a robust power switching solution for current accessories (for example, winches or heavyduty lighting) that require reliable on/off control at 12/24V DC. Installation and safety notes Ensure wiring and connectors are rated for current and compatible with 12/24V DC systems. Follow proper electrical safety practices when wiring and servicing current relays. Verify correct orientation and secure mounting to maintain reliable electrical contact and operation. This description reflects the product's brand positioning as a car and excavator specific current power switch relay, with the stated current ratings, voltage range, and size specification.