Hitachi 4250350 Ignition Switch Assembly

The 4250350 ignition switch is a 24-volt rotary starter switch assembly designed for Hitachi hydraulic excavator electrical systems. It features a 6-terminal connector configuration that plugs directly into the existing wire harness without splicing. The switch includes two H800-profile keys and utilizes brass and copper contacts within a thermoplastic housing for environmental resistance. Cross-reference part numbers include 4448303, 4477373, 4469337, and AT154992. The component serves as a direct replacement for the OEM switch;start assembly on applicable Hitachi excavator models. Operating voltage is 24V DC. The switch mechanism controls engine ignition and accessory circuits through key positions: OFF, ON, START.