Overcurrent circuit breaker, 3P, Z characteristic, 50A, 15kA, AC | S303P-Z50 2CDS383001R0578

Three-pole overcurrent circuit breaker – reliable installation protection

This three-pole overcurrent circuit breaker from ABB's S300P series is a key element of electrical protection in every circuit. Designed to protect against overloads and short circuits, it ensures safe and stable operation of the electrical installation in both commercial and industrial buildings. Characteristic Z guarantees effective protection of devices sensitive to sudden current changes, and high short-circuit breaking capacity (up to 25kA) minimizes the risk of damage in the event of a failure.

Characteristics and application

The S303P-Z50 circuit breaker with a rated current of 50A, equipped with characteristic Z, is ideal for protecting circuits powering devices with high inrush current, such as motors or transformers. Characteristic Z means a delayed thermal release time, which allows for short-term exceeding of the rated current without unnecessary tripping of the circuit. The rated impulse withstand voltage of 6kV provides additional protection against overvoltages. DIN rail mounting simplifies installation and replacement.

Key features and benefits

• High short-circuit breaking capacity: 25kA at 400V ensures effective disconnection of the circuit in the event of a short circuit, protecting devices and the installation from serious damage.
• Characteristic Z: Delayed thermal release time allows for trouble-free starting of devices with high inrush current, such as motors or transformers.
• Wide operating temperature range: From 0°C to 70°C enables mounting in various environmental conditions.
• DIN rail mounting: Facilitates quick and easy installation and replacement of the circuit breaker.
• Connection conductor cross-section: Accepts stranded conductors with a cross-section from 0.75 mm² to 25 mm² and solid conductors from 0.75 mm² to 35 mm², ensuring compatibility with various types of installations.
• Overvoltage category IV: Provides high resistance to overvoltages in electrical installations.
• Protection degree IP20: Protects against touching with fingers and solid objects larger than 12.5 mm.
• Compliance with standards: Meets the requirements of EN 60898 and IEC 60947-2 standards, guaranteeing safety and reliability of operation.

This circuit breaker is not only a protective element, but also an investment in the long-term and safe operation of the entire electrical installation. Its solid construction and high quality workmanship ensure reliable operation for many years of use.