Why Choose the ABB 1SBH131001R8459 NFC51/11-84 Contactor Relay?
The ABB 1SBH131001R8459, also known as the NFC51/11-84, is an 8-pole AC-operated contactor relay designed for reliable switching of auxiliary and control circuits in industrial automation and electrical control systems. As part of the ABB NFC contactor relay range within the AF platform, it combines optimised operating times with a robust block-type construction for dependable control applications.
The NFC51/11-84 features 8 auxiliary contacts, comprising 6 normally open (N.O.) contacts and 2 normally closed (N.C.) contacts. Its specialised contact arrangement includes a leading normally open contact and a lagging normally closed contact, making the relay particularly suitable for control sequences where overlapping contact operation is required.
Designed for an electromagnetic 110 V AC coil at 50 Hz or 110–120 V AC at 60 Hz, the NFC51/11-84 provides straightforward integration into industrial control circuits. Screw terminals, compact dimensions and compatibility with additional ABB auxiliary contact blocks and AF-platform accessories make it a flexible choice for control panels, machinery and automation installations.
Key Advantages
- Reliable 8-pole contactor relay for auxiliary and control circuits.
- 6 N.O. + 2 N.C. auxiliary contact configuration for complex control functions.
- Includes leading and lagging contacts for overlapping switching sequences.
- 110 V AC at 50 Hz / 110–120 V AC at 60 Hz electromagnetic control coil.
- Compact block-type construction simplifies control-panel installation.
- Screw terminals provide secure and convenient field wiring.
- Expandable using ABB auxiliary contact blocks and compatible AF-platform accessories.
- Suitable for demanding industrial automation and machine-control applications.
Key Features
- ABB NFC51/11 contactor relay series.
- 8 mechanically linked auxiliary contacts.
- 6 normally open and 2 normally closed contacts.
- Special contact arrangement with 1 leading N.O. and 1 lagging N.C. contact.
- 110 V AC 50 Hz / 110–120 V AC 60 Hz control voltage.
- 690 V IEC rated operational voltage.
- 16 A conventional free-air thermal current.
- Rated operational current of 4 A at 220–240 V AC-15.
- Compact 45 mm-wide housing.
- Screw-terminal connections for auxiliary and control circuits.
Reliable Auxiliary Switching for Industrial Control Systems
Contactor relays such as the ABB NFC51/11-84 provide multiple electrically operated contacts for switching auxiliary signals and control circuits. This allows a single control signal to operate several circuits simultaneously, supporting functions such as electrical interlocking, sequencing, signalling and machine-control logic.
The NFC51/11-84 is particularly useful where defined overlapping contact operation is required. Its leading and lagging contact arrangement enables controlled switching sequences, while the mechanically linked auxiliary contact elements, robust electromagnetic operating mechanism and expandable AF-platform design support reliable integration into modern industrial control systems.
Typical Applications
- Industrial control and automation panels.
- Machine control and sequencing circuits.
- Motor starter auxiliary control circuits.
- Electrical interlocking systems.
- PLC and automation interface circuits.
- Process control and signalling systems.
- Manufacturing and production machinery.
- OEM electrical control equipment.
