1SAE231111R0131 ABB ESB25-31N-01 Installation Contactor 3NO/1NC 25 A 24 V AC/DC

Why Choose the ABB ESB25-31N-01 Installation Contactor?

The ABB ESB25-31N-01 is a compact four-pole installation contactor designed for reliable electrical load control in residential, commercial and industrial installations. Part of ABB's ESB25..N range, it combines three normally open and one normally closed main contacts (3NO + 1NC) with a rated operating current of up to 25 A for AC-1/AC-7a applications.

Designed for modular distribution boards and control panels, the ESB25-31N-01 uses a 24 V AC/DC control circuit, allowing operation from compatible AC or DC control supplies. ABB's ESB..N technology provides hum-free operation, low power consumption and integrated overvoltage protection for dependable everyday switching.

The mixed 3NO + 1NC contact arrangement provides flexibility where several normally open switching paths and one normally closed path need to operate together. Its compact 36 mm two-module width makes efficient use of DIN rail space while providing four-pole control in a single modular device.

Key Advantages

• 3NO + 1NC main contact configuration for versatile multi-pole switching.
• 25 A AC-1/AC-7a rated operating current for suitable electrical loads.
• 24 V AC/DC control circuit supports compatible AC and DC control supplies.
• ABB ESB..N technology provides hum-free operation for quieter installations.
• Low power consumption supports efficient building and control-panel applications.
• Integrated overvoltage protection helps protect the electronic control circuit.
• Compact 36 mm / two-module width for space-efficient DIN rail installation.

Key Features

• ABB ESB25..N installation contactor.
• Four-pole configuration.
• 3NO + 1NC main contacts.
• 25 A AC-1/AC-7a rated operating current.
• 24 V AC/DC rated control circuit voltage.
• Suitable for controlling compatible single- and three-phase loads.
• Hum-free operation for noise-sensitive residential and commercial environments.
• Integrated overvoltage protection and low power consumption.
• DIN rail mounting with screw-terminal connections.

Flexible 24 V AC/DC Multi-Pole Load Control

ABB ESB25..N installation contactors are designed for electrically controlled switching of single- and three-phase loads in household, commercial and industrial environments. Their AC/DC-operated control circuit makes them suitable for integration with compatible timers, thermostats, relays, switches and building-automation equipment.

The ESB25-31N-01 combines a 24 V AC/DC control circuit with three normally open and one normally closed contact. When the contactor is energised, the three NO contacts close while the NC contact opens. This mixed configuration provides useful flexibility for coordinated load switching, interlocking, signalling and auxiliary control functions from one compact device.

Typical Applications

• Residential and commercial electrical distribution boards.
• Building automation and load-control systems.
• Lighting and heating control circuits.
• Mixed normally open and normally closed switching functions.
• Electrical interlocking and signalling circuits.
• Control circuits operated by timers, thermostats or relays.
• Industrial control panels and electrical installations.
• Compatible single- and three-phase load-control applications.