Why Choose the ABB 1SBH131001R8159 NFC51/11-81 Contactor Relay?
The ABB 1SBH131001R8159 (NFC51/11-81) is a high-performance 8-pole contactor relay designed for switching auxiliary and control circuits in industrial automation, machine control and electrical panel applications. As part of the ABB NFC contactor relay range, it is engineered for applications requiring optimised operating times with conventional electromagnetic AC coil control.
The NFC51/11-81 provides 8 auxiliary contacts comprising 6 normally open (NO) and 2 normally closed (NC) contacts. This arrangement includes one leading NO contact and one lagging NC contact, making the relay particularly suitable for control sequences where defined contact operating order is important. Its mechanically linked contacts support dependable operation in industrial control and monitoring circuits.
With a 24 V AC 50/60 Hz control coil, screw terminal connections and a modular block design, the NFC51/11-81 integrates easily into modern industrial control systems. The relay supports operating voltages up to 690 V AC and can be expanded using auxiliary contact blocks and other accessories from ABB's AF platform.
Key Advantages
- Versatile 8-pole contactor relay for auxiliary and control circuits.
- 6 NO + 2 NC auxiliary contact configuration for complex control applications.
- Includes one leading NO and one lagging NC contact for optimised switching sequences.
- 24 V AC 50/60 Hz electromagnetic coil for standard industrial control supplies.
- Mechanically linked auxiliary contacts support dependable control and monitoring functions.
- Modular block construction supports additional ABB auxiliary contacts and accessories.
Key Features
- ABB NFC51/11-81 contactor relay.
- 8 auxiliary contacts.
- 6 normally open (NO) contacts.
- 2 normally closed (NC) contacts.
- Includes 1 leading NO contact and 1 lagging NC contact.
- 24 V AC 50/60 Hz rated control voltage.
- Conventional electromagnetic AC coil.
- Main operating voltage capability up to 690 V AC.
- Screw terminal connections for secure industrial wiring.
- Compatible with standard accessories from the ABB AF platform.
- DIN rail or screw mounting for flexible panel installation.
Reliable Switching for Industrial Control Circuits
Contactor relays such as the ABB NFC51/11-81 are designed to switch auxiliary and control circuits rather than primary motor power circuits. Their multiple contacts can perform functions including electrical interlocking, signal multiplication, status indication, control sequencing and interface switching between different elements of an industrial automation system.
The NFC51/11-81 combines six normally open and two normally closed contacts with a specialised leading and lagging contact arrangement. This configuration is useful where the timing sequence between contacts is important, while the 24 V AC electromagnetic coil provides optimised operation for industrial control systems using low-voltage AC control supplies.
Typical Applications
- Industrial control and automation panels.
- Electrical interlocking and sequencing circuits.
- Motor starter auxiliary control systems.
- Machine control and status signalling.
- PLC interface and signal multiplication circuits.
- OEM machinery and production equipment.
