Modular contactor, DIN rail mounting, 4NO contacts, 40A ST40-40

Universal modular contactor for DIN rail mounting

This modular contactor, designed for mounting on a standard 35 mm rail, is a reliable solution for controlling electrical circuits. It provides effective switching of loads, finding application in both home and industrial installations. Its compact dimensions – only 3 modules wide – allow for efficient use of space in the distribution board.

Construction and operating parameters

The contactor operates at 230 V AC, making it compatible with most standard electrical installations. The rated current of 40 A allows it to handle loads of up to 16000 W for incandescent bulbs and 8.5 kW in AC3 circuits (according to data from an alternative source). Four normally open contacts (4NO) provide great flexibility in configuring control circuits. The IP20 protection class provides basic protection against touch and ingress of solid objects.

Applications and benefits

• Versatility: ideal for controlling lighting, heaters, motors and other electrical devices.
• Compact dimensions: 3 modules wide makes installation easy even in tight distribution boards.
• Safety: compliance with standards ensures safe and reliable operation.
• Simple installation: dedicated for mounting on a 35 mm rail – installation is quick and intuitive.
• Durability: solid construction guarantees long device life.
• For professionals: enables the creation of efficient and safe automation solutions.
• For end users: reliable control of electrical devices at home or in the company.

The mounting depth of 65 mm allows for easy adaptation of the contactor to the existing electrical infrastructure. The lack of a manual control slider minimizes the risk of accidental switching on or off of the circuit, increasing safety. The lack of additional equipment options simplifies the design and reduces maintenance costs.