11B40040024 - 4P CONTACTOR B400.4.00 24v

Why Choose the 11B40040024?

Built for demanding power control, the Lovato B400 four-pole contactor (SKU 11B40040024) pairs a 24 V AC/DC coil with serious switching capacity. It provides 550 A Ith (AC1) and 420 A / 225 kW at 400 V in AC3 duty, with UL/CSA horsepower up to 350 HP at 480 V. Ideal for heavy motor starting and high current resistive loads, this contactor delivers consistent performance in multi-pole industrial applications.

Engineered for resilience, the B400 offers 1000 V rated insulation (Ui) and 8 kV impulse withstand (Uimp), plus a mechanical life of 10,000,000 cycles. It operates from -50 to +70 °C, at altitudes to 3000 m, Pollution Degree 3. Screw mounting with 35 Nm terminal tightening supports secure installation. Conforms to IEC/EN 60947-1 and 60947-4-1, and UL/CSA standards, supporting reliable use in control panels.

Key Benefits

• 550 A AC1 current rating handles heavy resistive loads.
• 420 A / 225 kW AC3 at 400 V for motor duty.
• 24 V AC/DC coil simplifies control integration and spares.
• 1000 V Ui and 8 kV Uimp for robust insulation.
• Operates from -50°C to +70°C for wide ambient conditions.
• 10,000,000-cycle mechanical life reduces maintenance interventions.
• Screw mounting and 35 Nm terminals ensure secure connections.
• Complies with IEC/EN, UL and CSA standards for acceptance.

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: 1110 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 4-pole contactor, 24 V AC/DC coil (SKU 11B40040024)
• Manufacturer datasheet and installation guidance
• Protective packaging for transit

Applications

• Heavy-duty motor control and starters for industrial machinery
• Switching large resistive loads under AC1 duty up to 550 A
• UL/CSA applications up to 350 HP at 480 V
• Power distribution and isolation in four-pole circuits
• HVAC, pumping and fan systems requiring multi-pole switching

Safety note: Install and commission only by qualified personnel to applicable standards. Isolate power before work and tighten terminals to the specified 35 Nm.