Overcurrent circuit breaker, 3P, D characteristic, 16A, 6kA, AC | S203-D16 2CDS253001R0161

Three-pole overcurrent circuit breaker, with D characteristic and rated current of 16A, is a reliable protection for electrical installations. Designed to protect circuits exposed to high surge currents, it is perfect for applications where standard circuit breakers with lower overload resistance may fail.

Protection and application

The D characteristic means a delayed response to current increase – the circuit breaker allows for short-term exceeding of the rated current without unnecessary tripping of the circuit. This is crucial when powering devices generating high starting currents, such as motors, transformers or welding machines. The rated short-circuit breaking capacity of 6kA (at 230V) and 10kA (at 400V) guarantees effective protection against the effects of short circuits. Additionally, the circuit breaker meets the requirements of EN 60898 standard, ensuring safe use.

Construction and installation

The S203-D16 circuit breaker occupies 3 modules in the distribution board. Installation is done on the TH35 rail – a standard in most modern electrical installations. The cross-section of the wires connected to the circuit breaker can range from 0.75 mm² to 25 mm² for multi-wire cables and up to 35 mm² for single-wire cables, providing great flexibility when choosing the appropriate cables. The IP20 degree of protection provides protection against accidental contact, but does not protect against the effects of water or dust – the circuit breaker is intended for installation in dry and closed rooms.

Key features and benefits

• D characteristic: ideal for protecting circuits with devices with high inrush currents – motors, pumps, welding machines.
• High short-circuit breaking capacity: 6kA at 230V and 10kA at 400V ensures effective protection of the installation in the event of a short circuit.
• Wide range of wire cross-sections: allows connection of cables of various thicknesses (up to 35 mm²), which facilitates installation and adaptation to existing installations.
• Compact dimensions: occupies only 3 modules in the distribution board, saving valuable space.
• Compliance with standards: meets the requirements of EN 60898 standard, guaranteeing safety and compliance with regulations.
• Energy limitation class: class 3 provides adequate protection in the event of an electric arc.
• Wide operating temperature range: from -25°C to +55°C allows operation in harsh environmental conditions.