Why Choose the LOVATO Electric 11B400400110 Four-Pole Contactor?
The LOVATO Electric 11B400400110 is a heavy-duty four-pole industrial power contactor designed for dependable switching of high-current electrical loads. As part of the robust LOVATO B400 contactor series, it provides an IEC conventional free-air thermal current rating of 550 A in AC-1 duty, making it suitable for demanding power distribution, heating, lighting and industrial automation applications.
This contactor features a versatile 110–125 V AC/DC control coil, enabling operation from compatible alternating-current or direct-current control supplies. Its four-pole configuration allows four conductors to be switched simultaneously, making it especially useful in three-phase systems requiring neutral switching or complete multipole circuit isolation.
With an operational current rating of 420 A in AC-3 duty, a rated insulation voltage of 1000 V and robust screw-mounted construction, the 11B400400110 is engineered for reliable operation in industrial switchboards, motor control centres, production machinery and power-management systems.
Key Advantages
- Heavy-duty four-pole contactor for industrial power switching.
- 550 A conventional thermal current rating in AC-1 duty.
- 420 A operational current rating in AC-3 duty.
- 110–125 V AC/DC control coil for flexible integration.
- Four-pole configuration supports neutral and multipole circuit switching.
- Compliant with major IEC, UL and CSA contactor standards.
Key Features
- LOVATO Electric B400 power contactor series.
- Four main power poles.
- 550 A conventional free-air thermal current.
- 420 A AC-3 operational current at up to 440 V.
- 110–125 V AC/DC control coil.
- 1000 V rated insulation voltage.
- 8 kV rated impulse withstand voltage.
- Screw mounting for secure industrial installation.
Reliable Four-Pole Power Switching
Four-pole contactors use a low-power control signal to switch four high-current conductors simultaneously. When the control coil is energised, all four main contacts operate together, enabling reliable remote control through PLCs, relays, timers, pushbuttons and industrial automation systems.
The LOVATO Electric 11B400400110 is particularly suitable for AC-1 applications involving resistive or slightly inductive loads, including industrial heating, lighting and power-distribution circuits. Its high AC-3 current rating also supports demanding three-phase motor-control applications.
Typical Applications
- Industrial heating and resistive load control.
- Four-wire three-phase electrical systems.
- Neutral conductor switching.
- Large three-phase motor-control systems.
- Industrial lighting installations.
- Power distribution and transfer panels.
- Motor control centres and switchboards.
- Heavy-duty OEM machinery and automation systems.
