I. Model and Brand

Model: 3E7279 (3E-7279)

Brand: Caterpillar

Aliases: Starter Magnetic Switch, Starter Solenoid Switch, High-Current Starter Relay

II. Core Parameters (Typical Values)

Voltage: 24V DC (Caterpillar Heavy-Duty Equipment Standard)

Function: Pure High-Current Switching (Starter Main Control); No Delay, No Pre-heating, No PCB

Contact Capacity: 100A+ (Short-duration surge capability up to 300A)

Terminals: 4-Post (2 Heavy-Gauge Power + 2 Light-Gauge Control); Bolt Connections (Not Blade Terminals)

Housing: Metal Base + Black Plastic Casing; Vibration-Resistant and Oil-Resistant; Includes Mounting Tabs

Weight: Approx. 0.4 kg

III. Applicable Models (Full Range of Caterpillar Heavy-Duty Diesel Equipment)

Excavators: 3126, 320B/C, 330B/C, 345B/C, etc.

Loaders: 950G, 962G, 980G, etc.

Dozers: D6R, D7R, D8R, etc.

Engines: 3126, C7, C9, C15, etc.