ABB NF40E 3-Pole Power Contactor, 40A AC-3, 24-60V AC / 20-60V DC Wide Range Coil, 1NO+1NC Auxiliary

Industrial motor control demands a contactor that can handle frequent switching without sacrificing reliability. The ABB NF40E power contactor answers that challenge with a robust 3-pole design rated for 40 A at AC-3, making it ideal for starting and stopping motors up to 18.5 kW. Its wide-range electronic coil accepts both 24-60 V AC and 20-60 V DC control signals, simplifying inventory and reducing wiring errors across mixed-voltage installations.

Who is it for

Electrical contractors, panel builders, and maintenance engineers who need a dependable contactor for motor starters, HVAC systems, pumps, conveyors, and other industrial loads. It is especially valuable in applications where control voltage may vary or where a single contactor model must cover multiple voltage scenarios.

Main features

• 3-pole main contacts rated 40 A AC-3 (18.5 kW at 400 V) and 70 A AC-1 for resistive or lightly inductive loads.
• Wide-range electronic coil operates on 24-60 V AC (50/60 Hz) or 20-60 V DC, eliminating the need for separate coil versions.
• Built-in auxiliary contact block with 1 normally open (NO) and 1 normally closed (NC) contact for status feedback or interlocking.
• High electrical durability: 1.5 million operations at AC-3, plus 10 million mechanical cycles for long service life.
• Screw terminals ensure secure, vibration-resistant connections; DIN rail or screw mounting for flexible installation.
• Rated insulation voltage 1000 V and impulse withstand 8 kV for safe operation in demanding industrial environments.

Specifications

• Brand: ABB
• Model: NF40E
• MPN: 1SBH137001R1140
• EAN: 3471523100015
• Number of poles: 3
• Rated operational current AC-3 (400 V): 40 A
• Rated operational power AC-3 (400 V): 18.5 kW
• Rated operational current AC-1 (400 V): 70 A
• Control circuit voltage: 24-60 V AC (50/60 Hz), 20-60 V DC
• Auxiliary contacts: 1 NO + 1 NC
• Coil type: Wide range electronic
• Terminal type: Screw terminals
• Mounting: DIN rail or screw
• Rated insulation voltage (Ui): 1000 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Degree of protection: IP20
• Operating temperature: -40 to +70 °C
• Electrical durability (AC-3): 1.5 million cycles
• Mechanical durability: 10 million cycles
• Standards: IEC 60947-4-1, UL, CSA
• Power loss per pole: 3.2 W (at 40 A AC-3)
• Coil consumption (hold-in): 3 W (DC), 3 VA (AC)

Tips

For reliable operation, ensure the control voltage remains within the specified range under all load conditions. Use appropriate cable sizes for the 40 A main terminals and torque screws to the manufacturer's recommended values. When mounting on a DIN rail, leave adequate spacing for heat dissipation. Consider adding a surge suppressor if the coil is switched by a solid-state device to protect the electronic coil.