I. Core Specifications

Model: 363-7123 (3637123, CA3637123)

Voltage: DC 24V

Structure: 4-pin / 5-pin plastic housing; features a built-in suppression diode (absorbs voltage spikes generated when the coil is de-energized, protecting the ECU).

Current: 30–40A Continuous; 70A Momentary (Parameters match the 272-5841 model in the same series).

Mounting: Plastic housing; water-resistant and vibration-proof; bolt-fixed installation.

II. Functional Positioning (Compared to Previous Models)

363-7123: General-purpose Power Relay (with diode)

Control: Lights, horns, solenoid valves, sensor power supplies, and auxiliary equipment; includes a surge-suppression diode for circuit protection. 

327-6208: General-purpose Low-power Relay (30A, no diode); serves as the main power relay for compact excavators. 

254-3783: High-current Solenoid (50A, metal housing); used for starter/pre-heating functions on the 320D model. 

241-8368: High-current Main Switch (100A, metal-finned housing); designed for continuous-duty power supply applications. 

228-9108: Time Delay Relay (10-second delay); used for engine shutdown / pre-heating delay functions.

III. Applicable Models

Excavators: 312D, 315D, 318D, 320D2, 324D, 329D, 336D, etc.

Wheel Loaders: 950H, 966H, 972H

Engines: C6.4, C7, C9, C13