11B31000220 Lovato b series 3 pole maxi contactor 320A 170kW 450A 230VAC/DC

Why Choose the 11B31000220?

Engineered for heavy-duty motor control, the Lovato B310 three-pole contactor (SKU 11B31000220) combines high switching capacity with a flexible control coil. It delivers AC3 320 A at 400 V (170 kW) with Ith 450 A, and uses a 220-240 V AC/DC coil for simplified control wiring. Rated Ui 1000 V with 8 kV impulse withstand, it mounts via screws for secure, reliable panel installation.

Built for demanding environments, this B310 contactor achieves 10,000,000 mechanical cycles and operates from -50 to 70°C, up to 3000 m altitude, Pollution Degree 3. UL/CSA ratings include 250 HP at 480 V, and it conforms to IEC/EN 60947-1 and 60947-4-1. Terminal tightening torque is 35 Nm for robust connections, and the 9520 g construction supports stable mounting in heavy industrial panels.

Key Benefits

• High AC3 capacity: 320 A at 400 V, 170 kW motors.
• Universal 220-240 V AC/DC coil simplifies control and spares.
• Robust insulation: Ui 1000 V and 8 kV impulse withstand.
• Long service life: 10,000,000 mechanical cycles reduce downtime.
• Wide operating range from -50 to 70°C suits harsh sites.
• UL/CSA 250 HP at 480 V supports large motor loads.
• Secure screw mounting with 35 Nm terminal tightening torque.
• Conforms to IEC/EN 60947 and UL/CSA standards for compliance.

Technical Specification

• Product type designation: B310
• Number of poles: 3
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Ith (IEC): 450 A
• Terminal tightening torque: 35 to 35 Nm
• Weight: 9520 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 B310 three-pole contactor, SKU 11B31000220.
• Pre-fitted 220-240 V AC/DC control coil.
• Manufacturer product datasheet and technical information.
• Installation and safety guidance from Lovato.

Applications

• Heavy-duty motor starters for pumps, compressors and conveyors.
• Power switching and control in industrial panels.
• HVAC fans, chillers and air handling equipment.
• Materials handling and processing machinery.
• Water and wastewater treatment plant motors.

Safety note: Install and service only by qualified personnel. Isolate all power before work, tighten terminals to 35 Nm, and operate within specified ratings and temperatures. Always follow Lovato instructions and applicable standards.