Circuit breaker S 303 3P D 16A 6000A TX3 403755

Overcurrent circuit breakers S 300 series – reliable installation protection

Overcurrent circuit breaker S 303 3P D 16A is part of the TX³ series, designed to protect electrical installations against the effects of overloads and short circuits. The device effectively protects circuits, ensuring safe operation and minimizing the risk of failure. It is a three-pole circuit breaker, ideal for use in residential and commercial buildings.

Design and functionality

The S 303 circuit breaker is characterized by a solid construction and easy mounting on a TH35 rail. The lower latch and terminal covers facilitate wiring, which is particularly appreciated by installers. The ability to cooperate with additional equipment, such as auxiliary contacts or releases, expands the functionality of the device and allows it to be adapted to the specific needs of the installation. It is worth noting the compact dimensions – a width of 3 modules allows for efficient use of space in the switchgear cabinet.

Characteristics and parameters

The circuit breaker has a D characteristic, which means it reacts with a delay to short-term current surges. This makes it particularly resistant to starting devices with electric motors or other loads with high inrush current. The rated short-circuit breaking capacity (Icn) is 6 kA at 400 V and 10 kA at 230 V, which guarantees effective protection in the event of a short circuit. The rated voltage is 400 V, and the rated current is 16 A. The IP20 degree of protection provides basic protection against contact and ingress of solid objects. The rated impulse withstand voltage Uimp is as high as 4 kV, which indicates high resistance to overvoltage.