Circuit breaker S 303 3P C 4A 6000A TX3 403540

Overcurrent circuit breaker S 303 3P C 4A is a reliable protection for electrical installations against the effects of overloads and short circuits. Designed for both domestic and professional applications, it provides effective protection for electrical circuits. Made in TX³ technology, it guarantees easy installation and convenient wiring thanks to the bottom latch and terminal shields.

Characteristics and application

This three-pole circuit breaker with a rated current of 4A and C characteristic is ideal for circuits where short-term current surges occur, e.g. when starting motors or devices with heating elements. The C characteristic allows it to react more slowly to short current surges, so it tolerates starting devices with a motor well. The rated short-circuit breaking capacity at 6kA at 400V and 10kA at 230V ensures effective protection against serious damage to the installation. Mounting on a TH35 rail is standard in most switchboards, which facilitates integration with existing systems.

Advantages and benefits

• High short-circuit breaking capacity: 6kA (400V) / 10kA (230V) – ensures the safety of the installation in the event of a short circuit.
• C characteristic: optimal for circuits with devices generating surge currents (e.g. motors, transformers).
• Easy installation: bottom latch and terminal shields facilitate and speed up installation.
• Expandability: compatible with DX3 series accessories (auxiliary contacts, release units).
• Durable construction: withstands up to 20,000 mechanical cycles, ensuring long-term reliability.
• Width of 3 modules: compact dimensions allow for efficient use of space in the switchboard.
• Compliance with standards: meets the requirements of IEC/EN 60898-1 and IEC/EN 60947-2 standards, guaranteeing safety and compliance with regulations.

Technical parameters

The circuit breaker has a rated voltage of 400V AC and an insulation voltage of 500V. It operates in the frequency range of 50-60Hz, making it a universal solution for most electrical installations in Poland and Europe. The degree of protection IP20 provides basic protection against accidental contact. The energy limitation class is 3 and the pollution degree is 2, which means it is adapted to work in an environment with a moderate degree of pollution. The rated impulse withstand voltage Uimp is as high as 4kV, which further increases its resistance to overvoltages.