Technical Specifications​

12 V DC coil, 250 A continuous current rating, 500 A momentary inrush rating, 4-pole normally-open main contacts, coil resistance approximately 3.5 to 4.0 Ω, operating temperature -40 to 85°C, zinc-plated steel housing, stud-type main terminals and coil terminals, bolt mounting, ingress protection IP54 depending on orientation.

Functional Features​

Continuous-duty coil operation, high-current contact bridging, silver-alloy low-resistance contacts, arc-resistant design, corrosion-resistant housing, stable performance under vibration and temperature cycling.

Application Scenarios​

Commercial vehicles, construction equipment, material-handling trucks, marine battery systems, sweepers, hydraulic pump power switching and other DC systems requiring sustained 12 V high-current control.

Performance Parameters​

250 A sustained conduction, 500 A short-duration peak, low contact voltage drop with silver-alloy tips, repeated switching cycles under heavy DC load when installed with correct cable and cooling.

Material Composition​

Zinc-plated steel enclosure, silver-alloy main contacts, copper coil winding, insulated bobbin, stainless or plated hardware, ceramic/thermoset insulating parts where required.

Structural Features​

Stud-mount power terminals, separate coil control studs or terminals, enclosed electromagnetic coil, movable contact bridge, mounting flange or bracket holes, sealed/semi-sealed construction depending on version.

Working Principle​

A 12 V DC control current energizes the coil, creates a magnetic field, pulls the contact bridge closed and connects the battery or power source to the load. Removing coil voltage releases the bridge and opens the power circuit.

Installation Requirements​

Mount on a rigid metal surface with proper brackets, use cable gauge suitable for 250 A continuous load, torque main studs and coil terminals to specification, keep the solenoid away from exhaust heat sources, provide ventilation for continuous operation.