Terex
Electric relay for Terex HC230
This electric relay serves as an electromechanical switch within the electrical system of the Terex HC230 lattice crane. It manages power distribution to various circuits, allowing low-voltage controls to operate higher-current components.
Parts diagram
Compatible models
Specifications
- Part number
- 0870 874 UA
- Brand
- Terex
The 0870 874 UA electric relay functions as an electromechanical switch designed for the electrical system of the Terex HC230 lattice crane. By utilizing a small control current to activate a larger current in a separate circuit, this component manages power flow to critical machine systems. It protects low-voltage switches and control interfaces from the higher electrical loads required by motors, lighting, solenoids, and other power-intensive equipment found throughout the crane.
This relay is engineered for fitment within the Terex HC230 electrical architecture. It plays a role in regulating the power supply for motor starting circuits, lighting systems, and various control functions for the crane boom and safety systems. Proper operation of this relay ensures that electrical energy is directed to the intended components during machine use.
In heavy machinery, relays act as intermediaries that isolate control panels from high-amperage loads. They allow operators to trigger high-power functions safely through switches and sensors. When a relay fails, it may result in intermittent operation, failure of a specific circuit to engage, or a complete loss of function in the associated system.

