Overcurrent circuit breaker, 3P+N, B characteristic, 32A, 6kA, AC | S203-B32NA 2CDS253103R0325

Reliable protection of electrical installations with ABB S203-B32NA circuit breaker

This three-pole circuit breaker with a connected neutral pole (3P+N) is a key element of every safe electrical installation. Designed by the renowned company ABB, the S203-B32NA model provides effective protection against overloads and short circuits, guaranteeing uninterrupted power supply and user safety. It is characterized by a rated current of 32A and a short-circuit breaking capacity of up to 6kA at 400V, making it an ideal choice for both home and commercial installations.

Construction and application

The S203-B32NA circuit breaker belongs to the S200 pro M compact series, known for its compact size and high reliability. Its B characteristic means that the trigger reacts quickly to an increase in short-circuit current, but is more tolerant of short-term inrush currents, which is particularly important when connecting devices with electric motors or other inductive loads. Mounting on a DIN rail with a width of 4 modules makes it easy to integrate with existing electrical infrastructure.

• Versatile application: ideal for protecting lighting circuits, socket outlets and other energy consumers in residential and commercial buildings.

• Overload protection: delayed thermal mechanism protects against prolonged exceeding of the permissible current, preventing overheating of wires and damage to equipment.

• Short-circuit protection: fast-acting magnetic mechanism instantly interrupts the circuit in the event of a short circuit, minimizing the risk of fire and equipment damage.

• Safety: high short-circuit breaking capacity (6kA at 400V) ensures effective protection of the installation in the event of a failure.

• Compatibility: the possibility of connecting wires with a cross-section from 0.75 mm² to 35 mm² (solid) and from 0.75 mm² to 25 mm² (stranded) provides installation flexibility.

Parameters and construction features

The S203-B32NA circuit breaker has been designed with durability and reliability in mind. Its energy limitation class is 3, and the surge category is III – which proves its resistance to disturbances in the electrical network. The IP20 degree of protection provides protection against accidental contact, and the wide operating temperature range (-25°C to +55°C) allows installation in various environmental conditions. Additionally, the possibility of expansion with additional accessories increases the functionality of the device and allows it to be adapted to individual installation needs. The rated impulse withstand voltage is as high as 4kV, which further increases its resistance to sudden voltage changes.