ESB25-04N-01 ABB Modular Contactor 25A 4P NC 24V AC/DC Coil 1SAE231111R0104

The ESB25-04N-01 (1SAE231111R0104) is an ABB 25A 4-pole modular contactor with normally closed (NC) configuration and 24V AC/DC coil operation. This modular contactor, also known as a lighting contactor, heating contactor, or installation contactor, is designed for reliable switching and control of electrical loads up to 25 amperes across four poles.

ABB's ESB25-04N-01 modular contactor delivers dependable electrical switching performance for commercial and industrial applications. With its compact DIN rail mounting design and hum-free operation, this 25A contactor provides efficient control of lighting circuits, heating systems, ventilation equipment, and motor loads while maintaining quiet operation in noise-sensitive environments.

Key Features

• 25A Current Rating with 4-Pole Configuration: Handles substantial electrical loads across four independent switching poles, ideal for three-phase systems with neutral switching or multiple single-phase circuits
• Universal 24V AC/DC Coil Operation: Provides installation flexibility by accepting both AC and DC control voltages, simplifying integration into diverse control systems
• Hum-Free AC/DC Design: Eliminates operational noise that can be disruptive in office buildings, hospitals, and residential installations
• Normally Closed (NC) Contact Configuration: Contacts remain closed when the coil is de-energised, providing fail-safe operation for critical safety applications
• Compact DIN Rail Mounting: Measures just 36mm wide, maximising panel space efficiency while enabling quick installation and maintenance
• 10mm² Maximum Flexible Cable Capacity: Accommodates substantial cable sizes for high-current connections without requiring cable end sleeves
• Wide Operating Temperature Range: Functions reliably from -25°C to +55°C, suitable for harsh industrial environments and outdoor installations
• IP20 Protection Rating: Provides appropriate protection for standard control panel installations

Applications

The ESB25-04N-01 modular contactor is widely utilised in building services, industrial automation, and infrastructure applications. Common installations include lighting control systems in commercial buildings, heating and ventilation equipment switching, electric vehicle charging station control, motor and pump control circuits, and emergency lighting systems. The normally closed configuration makes it particularly suitable for safety-critical applications where power must be maintained during control system failures.

Standards and Compliance

This ABB modular contactor carries UKCA, CE, and UL certifications, ensuring compliance with European and North American electrical standards. The IP20 protection rating makes it suitable for standard control panel installations in dry indoor environments.

Manufactured by ABB in Germany, order code ESB25-04N-01.

Frequently Asked Questions

What cable sizes can be connected to the ESB25-04N-01 modular contactor?

The ESB25-04N-01 accepts flexible cables up to 10mm² maximum capacity, providing ample connection capability for 25A applications. The terminals are designed to accommodate substantial cable sizes without requiring cable end sleeves, simplifying installation and maintenance procedures.

How does the normally closed (NC) configuration differ from normally open contactors?

The ESB25-04N-01 features normally closed contacts, meaning the main contacts remain closed when the 24V coil is not energised. This configuration provides fail-safe operation where power is maintained to the load during control system failures or power outages, making it ideal for emergency lighting, safety systems, and critical heating applications.

What are the mounting dimensions and panel space requirements?

The contactor measures 36mm wide × 85mm high × 64.8mm deep and weighs 0.25kg. The compact 36mm width allows multiple units to be mounted side-by-side on standard DIN rail, maximising control panel space efficiency while providing easy access for wiring and maintenance.

Can the ESB25-04N-01 be used with both AC and DC control systems?

Yes, the universal 24V AC/DC coil design accepts both alternating and direct current control voltages at 24V. This versatility simplifies integration into diverse control systems and eliminates the need to specify separate AC or DC versions, while the hum-free design ensures quiet operation regardless of supply type.

Where can I buy ESB25-04N-01 ABB Modular Contactor 25A 4P NC 24V AC/DC Coil 1SAE231111R0104 in the UK?

CSE Distributors supplies the ESB25-04N-01 as an official ABB franchised distributor, with warehouse locations in Wooburn Green and Southampton. As a family-run business with over 50 years of experience and hundreds of positive reviews, CSE offers technical support, competitive pricing, and nationwide next-day delivery.