11B400400440 - 4P CONTACTOR B400.4.00 440/480

Why Choose the 11B400400440?

Engineered for demanding duty, the Lovato B400 four-pole contactor delivers 550 A Ith (AC1) and 420 A AC3 at 400 V (225 kW). The AC/DC coil operates on 440–480 V, simplifying control across mixed systems. With Ui 1000 V and 8 kV impulse withstand, and secure screw mounting, it provides reliable switching for high-current applications.

Built to last, it offers a mechanical life of 10,000,000 cycles and operates from -50 to +70 °C, up to 3000 m altitude. Rated Pollution Degree 3 and verified to IEC/EN 60947-1/-4-1, UL and CSA standards, it suits global panels. At 480 V, UL/CSA horsepower reaches 350 HP, supporting large motors with assured conformity.

Key Benefits

• 550 A AC1 rating for reliable high-current switching duty.
• 420 A and 225 kW AC3 at 400 V for robust motor loads.
• AC/DC coil operates on 440-480 V, simplifying control design.
• Rated Ui 1000 V and Uimp 8 kV for dielectric strength.
• Operates from -50 to +70 °C for harsh environments.
• Mechanical life of 10,000,000 cycles enhances service longevity.
• UL/CSA 350 HP at 480 V supports large motor applications.

Technical Specification

• Product type designation: B400
• Number of poles: 4
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Ith (IEC): 550 A
• Terminal tightening torque: 35 to 35 Nm
• Weight: 1114 g
• Mechanical life: 10000000 cycles
• Operating temperature: -50 to 70 °C
• Storage temperature: -60 to 80 °C
• Max altitude: 3000 m
• Pollution degree: 3

What’s Included

• Lovato B400 four-pole contactor (SKU 11B400400440)
• Integrated AC/DC control coil rated 440–480 V
• Manufacturer datasheet available for download
• Protective packaging for transit

Applications

• Motor starters requiring AC3 performance at 400 V up to 225 kW.
• Switching of high-current resistive loads under AC1 duty up to 550 A.
• Industrial panels with 440–480 V coil control supply.
• High-power motor control up to 350 HP at 480 V (UL/CSA).

Safety note: Install and commission only by qualified personnel. Isolate all power before wiring, observe the stated ratings and operating conditions, and tighten terminals to 35 Nm. Follow applicable regulations and standards.