Modular contactor ST40-40/24 modular contactor 4NO contacts I=40A coil voltage U=24V AC 3 modules ST40-40-24V

Universal modular contactor for mounting on a 35mm rail

This modular contactor, with a rated current of 40A and a coil voltage of 24V AC, is a reliable solution for controlling electrical circuits. Designed for direct mounting on a standard 35mm rail, it simplifies installation and integration into existing systems. Its compact design – occupying only 3 modules – allows for saving space in the distribution board.

Construction and application

This contactor is equipped with 4 normally open (4NO) contacts, making it ideal for applications requiring switching of multiple circuits. The rated operating voltage is 230V AC, and the control voltage is 24V AC. This makes it compatible with a wide range of control systems. The IP20 protection class provides basic protection against touch and ingress of solid objects.

Advantages and benefits

• High switching performance: Rated current of 40A allows handling of high-power loads.
• Compact dimensions: 3 module width minimizes space occupied in the distribution board.
• Easy installation: Direct mounting on a 35mm rail simplifies installation and reduces system startup time.
• Versatility: 4 normally open (4NO) contacts increase application flexibility in various circuit configurations.
• Safety: Compliance with standards ensures safe and reliable device operation.
• Maximum switching capacity for lamps: up to 16000W - allows connection of even demanding receivers.

This contactor finds application in building automation, heating, ventilation and air conditioning (HVAC) systems, and in many other industrial and commercial applications requiring reliable control of electrical circuits. The lack of a slider for manual operation eliminates the risk of accidental switching on or off of the device during maintenance or repair.