Why Choose the ABB 1SBH131001R8131 NFC31E-81 Contactor Relay?
The ABB 1SBH131001R8131 (NFC31E-81) is a compact and reliable four-pole contactor relay designed for switching auxiliary and control circuits in industrial automation, machinery and electrical control panels. As part of the ABB NFC contactor relay series, it provides optimised operating times for AC-controlled applications using conventional electromagnetic control.
The NFC31E-81 features 3 normally open (NO) and 1 normally closed (NC) auxiliary contacts, providing a versatile four-pole arrangement for electrical interlocking, sequencing, signalling and control functions. Its block-type construction can be expanded with compatible auxiliary contact blocks and accessories from ABB's AF platform, making it suitable for both straightforward and more complex control systems.
With a rated control supply of 24 V AC at 50/60 Hz, the NFC31E-81 is particularly suitable for low-voltage industrial control circuits. Screw terminal connections provide secure wiring, while its compact 86 × 45 × 77 mm dimensions and DIN rail or screw mounting options simplify installation inside machinery and electrical control cabinets.
Key Advantages
- Compact four-pole contactor relay for auxiliary and control circuits.
- 3 NO + 1 NC auxiliary contact configuration for flexible control functions.
- 24 V AC 50/60 Hz electromagnetic coil for low-voltage control systems.
- Mechanically linked auxiliary contacts for dependable control and interlocking applications.
- Block-type construction supports compatible ABB auxiliary contact blocks and accessories.
- DIN rail or screw mounting provides flexible installation within industrial control panels.
Key Features
- ABB NFC31E-81 contactor relay.
- 4 auxiliary contact poles.
- 3 normally open (NO) contacts.
- 1 normally closed (NC) contact.
- 24 V AC 50/60 Hz rated control supply.
- Electromagnetic AC control.
- Rated operational voltage up to 690 V IEC.
- Rated operational voltage up to 600 V UL/CSA.
- 3 A rated operational current at 400 V.
- 4 A rated switching current.
- Screw terminal connections for secure industrial wiring.
- DIN rail or screw mounting.
- Expandable using compatible accessories from the ABB AF platform.
Reliable Switching for Industrial Control Circuits
Contactor relays such as the ABB NFC31E-81 provide electrically operated contacts for auxiliary and control circuits rather than primary motor power switching. Their contacts can be used for electrical interlocking, machine sequencing, signal multiplication, status indication and interface functions within industrial automation systems.
The NFC31E-81 combines three normally open and one normally closed contact with a 24 V AC electromagnetic coil. Its compact block-type construction, mechanically linked contacts and compatibility with ABB AF platform accessories make it a practical choice for machine builders, panel builders and automation engineers requiring dependable auxiliary switching.
Typical Applications
- Industrial control and automation panels.
- Electrical interlocking and sequencing circuits.
- Motor starter auxiliary control systems.
- Machine status and control signalling.
- PLC interface and signal switching circuits.
- OEM machinery and production equipment.
