Eaton CMUC24/25-31 Modular Contactor 25A 3NO 1NC 24V AC/DC

The Eaton CMUC24/25-31 is a high-performance modular contactor engineered for precise electrical switching within distribution boards. With a rated operational current of 25A and a versatile configuration of 3 normally open (NO) and 1 normally closed (NC) contacts, this device provides robust control for various electrical circuits. It is designed to operate on a 24V AC/DC control voltage, making it a reliable solution for managing power distribution in both residential and commercial environments.

Advantages

This modular contactor stands out due to its compact design, which allows for seamless integration into standard DIN-rail distribution systems. The use of AC/DC control voltage enhances its flexibility, reducing the need for specific power supply types and simplifying installation. Its durable construction ensures long-term operational reliability, minimizing maintenance requirements while providing consistent switching performance for demanding electrical loads.

Suitable for

• Controlling lighting systems in commercial buildings
• Managing heating and ventilation equipment
• Switching electrical loads in residential distribution boards
• Automated control of small motors and pumps

When it may not be suitable

This device is not intended for high-power industrial applications that exceed the 25A rated current capacity. It should not be used in environments with extreme moisture or corrosive atmospheres without appropriate protective enclosure.

Key specifications

• Rated operational current: 25A
• Contact configuration: 3 normally open (NO), 1 normally closed (NC)
• Control voltage: 24V AC/DC
• Mounting type: DIN-rail

How to use

The contactor is designed for mounting on a standard 35mm DIN-rail inside a distribution cabinet. Ensure that the power supply is disconnected before installation. Connect the control wires to the A1 and A2 terminals and the load wires to the corresponding power terminals according to the wiring diagram provided on the device housing. Verify all connections are tightened to the specified torque before restoring power.

What to consider before purchase

• Ensure the 24V AC/DC control voltage matches your existing control system
• Verify that the 25A current rating is sufficient for your specific load
• Check available space on the DIN-rail within your distribution board

Usage recommendations

For optimal performance and safety, ensure that the contactor is installed in a well-ventilated enclosure and that all electrical connections are inspected periodically for tightness.