Circuit breaker S 303 3P D 25A 6000A TX3 403757

Reliable protection for electrical installations – Legrand S 303 TX³ circuit breaker

This three-pole circuit breaker with D characteristic is a key element of every safe and reliable electrical installation. Designed to protect circuits against the effects of overloads and short circuits, it ensures continuous power supply and minimizes the risk of failure. The S 303 TX³ model is distinguished by its high quality of workmanship and ease of installation, making it an ideal choice for both professional installers and demanding users.

This circuit breaker, with a rated current of 25A, is perfect for securing circuits with higher power requirements, where resistance to short-term current surges is important – for example, when starting devices with motors. The D 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 of 6 kA (at 400 V) and 10 kA (at 230 V) guarantees effective protection in the event of serious disturbances in the network.

Design and installation – comfort of work and durability

The S 303 TX³ circuit breaker has been designed with the convenience of installers in mind. The lower latch and terminal covers make installation and connection of wires easier. The compact dimensions – only 3 modules wide – allow for efficient use of space in the switchboard. Installation is done on a standard TH35 rail, which ensures compatibility with most switchboards available on the market. Made of high-quality materials, it guarantees long-lasting and trouble-free operation even in difficult operating conditions.

An additional advantage is the possibility of expanding the functionality of the circuit breaker by mounting additional equipment modules, such as auxiliary contacts or undervoltage releases. The degree of protection IP20 provides protection against accidental contact and the ingress of solid objects larger than 12.5 mm. The rated insulation voltage Ui is 500 V, which increases safety of use.

Key features and parameters

• Rated current: 25 A – suitable for protecting circuits with medium power demand.

• Tripping characteristic: D – provides a delayed response to short-term overloads, ideal for devices with motors.

• Breaking capacity: 6 kA at 400 V / 10 kA at 230 V – high resistance to the effects of short circuits.

• Number of poles: 3 – provides comprehensive protection for three-phase electrical circuits.

• Width: 3 modules – compact dimensions save space in the switchboard.

• Mounting: TH35 rail – standard mounting simplifies installation.

• Rated voltage: 400 V - operating voltage typical for most electrical installations

• Rated impulse withstand voltage Uimp: 4 kV - resistance to impulse overvoltages

• Degree of protection (IP): IP20 - protection against contact and solid objects

• Possibility of additional equipment: yes - possibility to expand the functionality of the circuit breaker

The Legrand S 303 TX³ circuit breaker is an investment in the safety and reliability of your electrical installation. Solid workmanship, ease of installation and high technical parameters make it a product worthy of recommendation for both professionals and home users.