Cam switch 20A, Dahlander two-speed switch, in OB11 enclosure. SK20-4.8390\OB11

Universal cam switch for demanding applications

This 20-amp cam switch in OB11 housing is a robust solution for switching electrical circuits. Designed for both industrial installations and advanced home applications, it provides reliable operation and safety. The construction based on a two-pole Dahlander mechanism allows for flexible load control.

Construction and functionality

The switch is characterized by three poles and a screw connection of the main contacts, which facilitates assembly and connection of wires with a cross-section of 1…4 mm². The housing made of durable plastic provides high resistance to mechanical damage and external factors. The IP65 protection class guarantees protection against dust and water jets, allowing the switch to be used in harsh environmental conditions. Additionally, the presence of the "0" position increases safety during maintenance and repairs.

Applications and benefits

• Versatility: Ideal for AC-3 circuits with a rated power of up to 4 kW at 400 V.
• Durability: Suitable for frequent switching due to its high mechanical durability of 3 million switching cycles.
• Safety: Compliance with PN-EN 60947-3 standards and a high IP65 protection class ensure safe operation.
• Flexible mounting: Can be mounted on a panel (not for indirect mounting).
• Resistance to external conditions: Operation in temperatures from -40°C to +70°C and resistance to vibrations, shocks, damp heat and salt mist.
• Practical solutions: The OB11 housing has terminals for PE and N protective conductors and M20 cable glands for power cables.

User parameters

The cam switch SK20-4.8390\OB11 is distinguished by a high rated continuous current (20 A) and short-circuit current (10 kA). Its construction allows operation in a wide range of insulation voltages (690 V) and impulse voltages (4 kV). This makes it a reliable device that will perform well in demanding electrical applications. This model is particularly useful where changing the direction of motor rotation or switching between different electrical circuits is required.