11B250400440 - 4P CONTACTOR B250.4.00 440/480

Why Choose the 11B250400440?

Built for demanding control applications, the Lovato B250 four-pole contactor (SKU 11B250400440) delivers a robust AC-1 current rating of 350 A with a versatile 440-480 VAC/DC coil. This screw-mounted contactor integrates easily into panels while supporting coordinated multi-circuit control. As a proven Lovato solution, it provides dependable switching where high-current, four-pole control is essential, helping engineers standardise on a single device across varied industrial installations.

Engineered to endure, the B250 offers Ui 1000 V and Uimp 8 kV, a mechanical life of 10,000,000 cycles, and a -50 to 70 °C operating range. With 35 Nm terminal tightening torque, Pollution Degree 3 suitability and operation up to 3000 m altitude, it meets IEC/EN 60947-1/-4-1, UL and CSA standards. Weight is 1114 g, with storage from -60 to 80 °C.

Key Benefits

• 350 A AC-1 rating handles high-current resistive loads reliably.
• 440–480 VAC/DC coil provides flexible control power options.
• Four-pole configuration enables coordinated multi-circuit switching.
• Wide -50 to 70 °C operating range suits harsh environments.
• Long mechanical life of 10,000,000 cycles minimises maintenance.
• High dielectric strength: Ui 1000 V and Uimp 8 kV.
• Secure screw mounting; 35 Nm terminal tightening torque.
• Conforms to IEC/EN, UL and CSA standards for broad compliance.

Technical Specification

• Product type designation: B250
• Number of poles: 4
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Ith (IEC): 350 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 B250 four-pole contactor (SKU 11B250400440)
• Integrated 440–480 VAC/DC coil
• Manufacturer documentation and datasheet (online)
• Protective packaging for transit

Applications

• Industrial control panels requiring high-current AC-1 switching
• Power distribution and isolation within specified ratings
• OEM equipment with 440–480 VAC/DC control circuits
• Commercial and infrastructure systems across wide temperatures
• Multi-circuit control where a four-pole contactor is required

Safety note: Install and commission only by qualified personnel. Always isolate power before work, observe the specified ratings, and tighten terminals to 35 Nm in accordance with applicable standards.