Zamel STM-25-31/24V Modular Installation Contactor 25A 3NO+1NC 24V AC/DC

The Zamel STM-25-31/24V modular installation contactor is a high-performance electrical component engineered for the reliable switching of power circuits in various environments. Designed for seamless integration into modular distribution boards, this device provides robust control for electrical loads, ensuring safety and efficiency in both residential and industrial installations. With its 25A rated current and versatile 3NO+1NC contact configuration, it serves as a dependable solution for managing complex electrical systems.

Advantages

This contactor stands out due to its compact modular design, which allows for easy installation on standard DIN rails within electrical cabinets. The device is built for durability and consistent performance, minimizing maintenance requirements in demanding applications. Its compatibility with both AC and DC control voltages provides significant flexibility for system designers and electricians, while the silent operation ensures it can be used in residential settings without causing noise disturbances.

Suitable for

• Control of lighting systems in commercial and residential buildings
• Management of heating and ventilation equipment
• Switching of electrical circuits in modular distribution boards
• Industrial automation and control panel applications

When it may not be suitable

This device is not intended for use in environments with extreme moisture, high levels of dust, or corrosive gases, as these conditions may damage the internal components. It is also not suitable for applications requiring a rated current higher than 25A or for switching circuits that exceed its specified voltage limits.

Key specifications

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

How to use

The contactor should be installed by a qualified professional in a standard modular enclosure. Mount the device onto a 35mm DIN rail and ensure all electrical connections are tightened according to the specified torque requirements. Connect the control circuit to the coil terminals and the load circuit to the main power terminals, ensuring that the voltage and current ratings are strictly observed during the wiring process.

What to consider before purchase

• Ensure the control voltage of your system matches the 24V AC/DC requirement of the contactor.
• Verify that the total load current does not exceed the 25A rating.
• Check the available space in your distribution board to accommodate the modular width.
• Confirm the contact configuration (3NO+1NC) meets the specific requirements of your electrical circuit.

Usage recommendations

Always disconnect the power supply before performing any installation or maintenance work on the electrical system to ensure operator safety. Regularly inspect the connections to ensure they remain secure over time.