The 4-1618002-5 is a KILOVAC EV500 "BUBBA" contactor designed for high-power DC load switching and safety disconnect applications across a versatile 28–1800 Vdc operating range. It features a hermetically sealed, hydrogen-dielectric environment that protects contacts and moving parts, enabling reliable operation in harsh environments with continuous current carry of 600–1000 A (dependent on temperature and conductors), make current of 1,000 A, and break current of 3,300 A at 320 Vdc. The contactor delivers 360 kW power switching capability with contact resistance of 0.0002 ohm maximum, dielectric withstand of 2,000 Vrms, and hot power terminals rated to 200°C, supported by a built-in dual power coil economizer with 8 W holding power. With mechanical life exceeding 100,000 cycles and electrical life ratings up to 50,000 cycles for capacitive loads, this contactor is ideal for EV charging systems, energy storage, circuit protection control, and transfer switch applications requiring robust, sealed switching performance.