11B14540048 - 4P CONTACTOR B145.4.00 48V

Why Choose the 11B14540048?

Lovato’s B145 four‑pole contactor (SKU 11B14540048) delivers dependable switching with an AC/DC coil rated 48VAC/DC and an IEC thermal current Ith of 250A. It features a rated insulation voltage Ui of 1000V and impulse withstand Uimp of 8kV, providing robust electrical performance. Screw mounting and defined terminal tightening torque support consistent installation across control assemblies.

Engineered for longevity, the device is rated for 10,000,000 mechanical cycles and operates from −50 to 70°C, with storage from −60 to 80°C. It is specified for installations up to 3000 m altitude and pollution degree 3. Conformity includes IEC/EN 60947-1 and 60947-4-1, plus UL and CSA standards, with a Sustainability certification. Unit weight is 6280 g.

Key Benefits

• Four-pole configuration enables four-circuit switching within one device.
• 250 A Ith (IEC) for high AC1 thermal current capability.
• 48 VAC/DC coil supports both AC and DC control supplies.
• Rated Ui 1000 V and Uimp 8 kV for strong insulation performance.
• Wide operating temperature range from −50 to 70°C.
• Long mechanical life rated at 10,000,000 cycles.
• Screw mounting with 18 Nm terminal tightening torque.
• Conforms to IEC/EN, UL, and CSA standards.

Technical Specification

• Product type designation: B145
• Number of poles: 4
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Ith (IEC): 250 A
• Terminal tightening torque: 18 to 18 Nm
• Weight: 6280 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 B145 four-pole contactor, 48VAC/DC coil (SKU 11B14540048)
• Manufacturer product datasheet (downloadable)

Applications

• AC-1 load switching up to 250 A thermal current
• Control assemblies requiring a four-pole contactor
• Installations with insulation requirements up to 1000 V Ui
• Environments operating from −50 to 70°C or up to 3000 m altitude
• Panels built to IEC/EN 60947 and UL/CSA standards

Safety note: Install and commission only by qualified personnel; isolate power before work, tighten terminals to the specified 18 Nm, observe Ui 1000 V, Uimp 8 kV, temperature and altitude limits, and follow applicable IEC/EN 60947 standards and the manufacturer’s documentation.