Cam switch 40A, three-phase starter switch (0,Y,A), base rail mounting frontal yellow-grey knob red SK40-4.831\BS04

Motor starter switch – reliability and versatility

This three-phase cam switch with a rated current of 40A is a robust solution for controlling motors in a star-delta configuration. Designed for both professional applications and users requiring reliable equipment, it combines a durable construction with ease of installation. Made of high-quality plastic, it provides resistance to mechanical damage and external factors.

Functionality and installation

The switch allows switching between three positions: 0, Y (star) and Δ (delta), making it an ideal element in the starting circuits of three-phase motors. Mounting on a TH35 rail (busbar base) is quick and intuitive, and the screw connection of the main contacts guarantees secure and safe wire connections. The IP65 protection class provides protection against dust and water jets, allowing the switch to be used even in harsh industrial conditions. The yellow-gray front with a red knob makes it easier to identify and operate.

Safety and operating parameters

The switch design was created with user safety in mind. The rated power for AC-3 is 12 kW at 400V, and the high continuous rated current (Iu) of 40A guarantees stable operation even under heavy loads. The device meets the required safety standards, providing protection against overload and short circuit. The lack of auxiliary contacts makes it a solution focused on the basic function of switching motor circuits. Additionally, the inability to return to the 0 position ensures a firm hold of the selected configuration.

• Versatility: Intended for star-delta circuits increases the range of applications.
• Durability: Made of plastic ensures resistance to mechanical damage.
• Safety: IP65 protection class protects against dust and water.
• Easy installation: Mounting on a TH35 rail simplifies installation.
• Reliability: Rated continuous current of 40A guarantees stable operation under heavy loads.
• Readability: Color coding (yellow-gray front, red knob) makes it easier to identify the switch functions.
• Resistance to external conditions: Wide operating temperature range (-40°C to +70°C) allows use in various environments.