Why Choose the LOVATO Electric 11B40000440 Three-Pole Contactor?
The LOVATO Electric 11B40000440 is a heavy-duty three-pole industrial power contactor designed for reliable switching and control of large three-phase motors and high-current electrical loads. As part of the robust LOVATO B400 contactor series, it provides an IEC operational current rating of 420 A in AC-3 duty, making it suitable for demanding industrial motor-control and automation applications.
This contactor features a versatile 440–480 V AC/DC control coil, enabling operation from compatible alternating-current or direct-current control supplies. Its high switching capacity, durable construction and secure screw-mounted design support dependable use in motor control centres, switchboards, production machinery and process-control installations.
With a conventional free-air thermal current rating of 550 A in AC-1 duty and a motor rating of approximately 225 kW at 400 V AC-3, the 11B40000440 is engineered for applications requiring consistent high-power switching. Compliance with recognised IEC, UL and CSA standards further supports its use in industrial electrical systems and OEM machinery.
Key Advantages
- Heavy-duty three-pole contactor for industrial motor control.
- 420 A IEC operational current rating in AC-3 duty.
- 550 A conventional thermal current rating in AC-1 duty.
- 440–480 V AC/DC control coil for flexible integration.
- Suitable for motors up to approximately 225 kW at 400 V AC-3.
- Compliant with major IEC, UL and CSA contactor standards.
Key Features
- LOVATO Electric B400 power contactor series.
- Three main power poles.
- 420 A rated operational current at AC-3.
- 550 A conventional free-air thermal current at AC-1.
- 440–480 V AC/DC control coil.
- 225 kW motor rating at 400 V AC-3.
- 1000 V rated insulation voltage.
- Screw mounting for secure industrial installation.
Reliable High-Current Motor Control
Industrial contactors allow a low-power electrical control signal to switch high-current motor and power circuits. When the contactor coil is energised, the three main contacts close simultaneously, supplying power to the connected three-phase load. This enables safe remote operation through PLCs, pushbuttons, control relays and automated machine-control systems.
The LOVATO Electric B400 series is designed for demanding industrial installations where high current capacity and dependable switching performance are essential. The 11B40000440 combines a 420 A AC-3 rating with a 440–480 V AC/DC coil, providing a practical solution for large motors, industrial machinery and process equipment.
Typical Applications
- Large three-phase motor starters.
- Industrial pumps and compressors.
- Conveyors and material-handling systems.
- Manufacturing and production machinery.
- Motor control centres and switchboards.
- Process-control and factory automation systems.
- Industrial fans and ventilation equipment.
- Heavy-duty OEM machinery and electrical panels.
