GE Fanuc SGHA36AT0400 Industrial Contactor

The GE Fanuc SGHA36AT0400 is a robust 3-pole industrial contactor engineered for high‑reliability switching of power circuits in automation and control systems. This component is specifically designed to interface with PLC digital outputs, providing a durable interface between low‑voltage control signals and high‑power loads such as motors, heaters, and lighting banks. Its compact construction and high contact durability make it suitable for demanding industrial environments.

The contactor features a silver‑alloy contact system that resists welding and erosion, ensuring long electrical life even under frequent operation. The magnetic coil is designed for low power consumption, allowing direct activation by standard PLC transistor or relay outputs without the need for intermediate interposing relays. The SGHA36AT0400 also includes built‑in surge suppression to protect the PLC output circuitry from inductive kickback.

Electrical and Mechanical Specifications

• Number of poles: 3 (normally open)

• Rated operational current (Ie): 40 A (AC‑3 duty, 600 V AC)

• Rated insulation voltage (Ui): 1000 V

• Rated impulse withstand voltage (Uimp): 8 kV

• Coil voltage options: 24 V DC, 110 V AC, 220 V AC (depending on configuration)

• Coil power consumption: 8 W (DC) / 30 VA (AC)

• Mechanical durability: 10 million operations

• Electrical durability: 1 million operations at rated load

• Auxiliary contacts: 1 NO + 1 NC (built‑in)

• Mounting: DIN rail or screw‑fixed

• Terminal type: Box lugs for copper conductors up to 16 mm²

Functional Features

• PLC‑Compatible Coil: The coil is designed with a wide voltage tolerance (±10 %) to accommodate power supply fluctuations common in industrial panels.

• Integrated Mechanical Interlock: Allows for safe reversing contactor assemblies by mechanically preventing simultaneous closure.

• Visible Contact Status: A mechanical flag indicator provides local confirmation of contact position, aiding troubleshooting.

• Quick‑Connect Accessories: Supports snap‑on auxiliary contact blocks and timer modules for expanded functionality.

Application Areas

• Motor control centers: Starting and stopping AC motors in conveyor systems, pumps, and fans.

• Heating and lighting control: Switching resistive loads in industrial ovens and large‑area lighting.

• Automated machinery: Acting as a final actuation element for pneumatic/hydraulic valve solenoids via power switching.

• Power distribution panels: Isolating and switching capacitor banks.

Installation and Wiring Guidelines

The SGHA36AT0400 is designed for straightforward panel mounting. Ensure proper clearance for heat dissipation – at least 50 mm on all sides. Power terminals should be tightened to the specified torque (2.5 Nm) to prevent overheating. Control wiring should be separated from power cables to avoid electromagnetic interference. The auxiliary contacts are rated for 10 A at 250 V AC, suitable for PLC feedback circuits.

Environmental and Compliance

This contactor complies with IEC 60947‑4‑1 and UL 508 standards, carrying CE and cULus marks. It operates in ambient temperatures from -5°C to +60°C and is rated for pollution degree 3. The unit is RoHS compliant.

Conclusion

The GE Fanuc SGHA36AT0400 contactor delivers dependable switching performance for PLC‑controlled power circuits. Its robust construction, low coil consumption, and comprehensive protection features make it a preferred choice for system integrators requiring long‑term reliability in industrial automation.