BF40T4A024 Lovato contactor 4 pole AC3:40A 18.5kw 24VAC coil

Why Choose the BF40T4A024?

Designed for reliable power switching, the Lovato BF40T4A024 is a four-pole contactor with AC1 Ith 70 A and AC3 performance of 40 A/18.5 kW at 400 V. A 24 VAC 50/60 Hz coil ensures consistent actuation. The BF40 series unit supports screw fixing or 35 mm DIN rail mounting, giving installers flexible options while maintaining dependable, standards-aligned operation.

Engineered for demanding environments, it offers 1000 V rated insulation (Ui) and 8 kV impulse withstand (Uimp), with a mechanical life of 15,000,000 cycles. Operates from -50 to 70 °C up to 3000 m altitude; terminals tighten to 4–5 Nm. Conforms to IEC/EN/BS 60947-1 and 60947-4-1 plus UL/CSA equivalents.

Key Benefits

• Four-pole design for flexible multi-circuit switching tasks.
• 70 A AC1 rating for robust resistive load control.
• 40 A/18.5 kW AC3 performance at 400 V for motor duty.
• 24 VAC 50/60 Hz coil suits common control supplies.
• Screw or 35 mm DIN rail mounting speeds installation.
• Wide -50 to 70 °C operating range for harsh conditions.
• High insulation (1000 V Ui) and 8 kV impulse withstand.

Technical Specification

• Product type designation: BF40
• Number of poles: 4
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Ith (IEC): 70 A
• Terminal tightening torque: 4 to 5 Nm
• Weight: 1240 g
• Mechanical life: 15000000 cycles
• Operating temperature: -50 to 70 °C
• Storage temperature: -60 to 80 °C
• Max altitude: 3000 m
• Pollution degree: 3

What’s Included

• Lovato BF40T4A024 four-pole contactor
• Manufacturer product documentation (datasheet/installation guidance)
• Protective packaging for shipment

Applications

• AC3 motor switching at 400 V up to 40 A/18.5 kW
• General-purpose AC1 resistive load switching up to 70 A
• Control panels requiring screw or 35 mm DIN rail mounting
• Systems built to IEC/EN/BS 60947 or UL/CSA requirements
• UL/CSA 480 V motor circuits up to 30 HP

Safety note: Install and commission only by qualified personnel. Isolate power before work, tighten terminals to 4–5 Nm, and confirm the ratings and standards match the application and environmental limits.