Why Choose the LOVATO Electric 11B31000440 Three-Pole Contactor?
The LOVATO Electric 11B31000440 is a high-capacity three-pole industrial power contactor designed for switching and controlling large three-phase motors and heavy electrical loads. Part of the robust LOVATO B310 contactor series, it delivers an IEC operational current of 320 A (AC-3), making it ideal for demanding industrial motor control and automation applications.
Featuring a versatile 440–480 V AC/DC control coil, this contactor can be integrated into both AC and DC control systems, simplifying machine design and panel construction. Designed for long electrical and mechanical life, it provides dependable switching performance in continuous industrial operation.
With screw mounting, mirror contacts, EMC compatibility and compliance with IEC, UL and CSA standards, the 11B31000440 is suitable for use in motor control centres, industrial machinery, process plants and heavy-duty automation systems requiring reliable high-current switching.
Key Advantages
- Heavy-duty three-pole industrial contactor.
- 320 A IEC AC-3 operational current for large motor loads.
- 440–480 V AC/DC control coil for flexible installation.
- Suitable for motors up to 170 kW at 400 V AC-3.
- Long mechanical and electrical service life.
- Fully compliant with IEC, UL and CSA standards.
Key Features
- LOVATO B310 industrial contactor series.
- Three main power poles.
- 320 A AC-3 operational current.
- 450 A AC-1 thermal current (Ith).
- 440–480 V AC/DC coil voltage.
- Screw mounting installation.
- Mirror contacts for enhanced safety.
- EMC compliant construction.
- Mechanical life up to 10 million operations.
Reliable Heavy-Duty Motor Switching
Industrial contactors are essential components for safely switching three-phase motors and other high-current electrical loads. By energising the control coil, the contactor closes its main contacts, allowing motors to start and stop through PLCs, push buttons, safety relays and automation systems while isolating high-power circuits from the control circuitry.
The LOVATO B310 series is engineered for demanding industrial environments where high reliability, long operating life and consistent switching performance are required. Its high AC-3 rating makes it particularly suitable for large induction motors operating in manufacturing, infrastructure and heavy industrial applications.
Typical Applications
- Large three-phase motor starters.
- Industrial pumps and compressors.
- Conveyor and material handling systems.
- Process manufacturing equipment.
- Motor control centres (MCCs).
- Power distribution panels.
- Industrial automation systems.
- Heavy-duty machinery and OEM equipment.
