ABB NF31E Auxiliary Contactor Relay 3NO+1NC 24-60V AC/20-60V DC Screw DIN Rail

Unlike conventional contactor relays tied to a single coil voltage, the ABB NF31E auxiliary contactor relay accepts both 24–60 V AC (50/60 Hz) and 20–60 V DC on the same coil. This universal coil design reduces spare part inventory and simplifies panel engineering, making it a practical choice for control circuits in industrial environments. With a compact 45 mm width, screw terminals, and dual mounting options (DIN rail or screw), the NF31E fits seamlessly into crowded panels while delivering reliable switching performance.

Highlights

• Universal coil: 24–60 V AC / 20–60 V DC
• 3 normally open + 1 normally closed auxiliary contacts
• Rated operational current up to 6 A (AC-15 / DC-13)
• High insulation voltage 690 V and impulse withstand 6 kV
• IP20 protection, operating temperature -40 to +70 °C
• Meets IEC, EN, UL, and CSA standards

In daily use

In control panels, the NF31E reliably interfaces between PLC outputs and power contactors, motor starters, or signalling devices. Its wide coil voltage range reduces inventory complexity, while the clear terminal markings and captive screws speed up wiring. The compact design saves rail space, and the robust construction ensures long service life even in demanding conditions.

Full specifications

• Product type: Auxiliary contactor relay
• Number of poles: 3
• Contact configuration: 3 NO + 1 NC
• Coil voltage AC: 24–60 V (50/60 Hz)
• Coil voltage DC: 20–60 V
• Rated operational current AC-15 (230 V): 6 A
• Rated operational current DC-13 (24 V): 6 A
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Terminal type: Screw terminals
• Mounting type: DIN rail / screw mounting
• Degree of protection: IP20
• Operating temperature range: -40 to +70 °C
• Coil power consumption (pull-in): 3.5 VA / 3.5 W
• Coil power consumption (holding): 3.5 VA / 3.5 W
• Standards: IEC 60947-5-1, EN 60947-5-1, UL 60947-5-1, CSA C22.2 No. 60947-5-1

Final note

The ABB NF31E combines universal coil flexibility with robust switching performance, making it a dependable choice for modern industrial control systems.