Circuit breaker K60N-C20-3 C 20A 3-pole A9K02320

Safety and Protection of Electrical Installations

Overcurrent protection switch K60N-C20-3 is a reliable protection against the effects of overloads and short circuits in electrical circuits. The device, catalog number A9K02320, is three-pole and designed to operate with a rated current of 20A. It is characterized by a C characteristic, which means that it allows for short-term exceeding of the rated current without tripping, which is particularly useful for devices with electric motors or other elements generating high starting current. The rated breaking capacity of up to 6kA at 400V and 230V ensures effective protection of the installation in the event of serious failures.

Construction and Application

The K60N-C20-3 circuit breaker is designed for easy mounting on a DIN rail. Its compact dimensions (3 module width) allow for optimal use of space in the switchgear cabinet. It has double terminals from below, allowing connection of both busbars and wires. Serrated terminals increase connection reliability and minimize the risk of loosening wires during operation. The snap-action contact ensures quick and reliable switching of the circuit, regardless of the speed of operating the circuit breaker lever.

Key Features and Benefits

• Versatility: Suitable for residential and industrial buildings.
• C characteristic: Ideal for protecting circuits with devices with high starting current (e.g. motors, heating devices).
• High breaking capacity: 6kA at 400V/230V – effective protection against serious short circuits.
• Easy installation: Quick mounting on a DIN rail and double lower terminals facilitate installation.
• Reliable connections: Serrated terminals ensure stable and durable wire connections.
• Durability: Up to 20,000 mechanical and electrical cycles guarantees a long service life of the device.
• Safety: Rated impulse withstand voltage of 4kV increases resistance to overvoltage.
• Wide operating temperature range: From -25°C to 70°C allows operation in various environmental conditions.

Technical Data in Brief

The K60N-C20-3 circuit breaker operates at a rated voltage of 400V and a frequency of 50/60 Hz. It has energy limitation class 3 and protection degree IP20. The cross-section of the connected solid wire is from 0.5 to 35 mm², and stranded wire from 0.5 to 25 mm². The pollution degree is 2, and the rated insulation voltage Ui is 440V. The device meets the standards EN/IEC 60898-1 ensuring safety and compliance with applicable regulations.