Residual current circuit breaker, 2P, AC, 40A, 300mA, instantaneous F202 AC-40/0.3 2CSF202001R3400

### Protection and safety of electrical installations

This two-pole residual current device (RCD) from ABB, with a rated current of 40A and a sensitivity of 300mA (0.3A), is designed to protect people and electrical installations from the effects of electric shock and fires caused by short circuits to earth. Made in AC characteristic, it ensures reliable operation in circuits with alternating current loads.

This circuit breaker is an ideal solution for both installers and end users who value safety and reliability. Its compact size – it takes up 2 modules on a DIN rail – makes it easy to install in electrical distribution boards. The use of a mechanical lock prevents accidental disconnection of the device, increasing safety.

Functionality and technical parameters

The F202 AC-40/0.3 circuit breaker is characterized by high surge current resistance (0.25 kA) and short-circuit withstand strength at 1 kA, which guarantees its reliable operation even in difficult operating conditions. Adapted to work at temperatures from -25°C to 55°C, it will perform well in various environments. The possibility of connecting solid conductors with a cross-section of 25 mm² provides flexibility during installation.

The rated insulation voltage Ui is 500V, and the rated impulse withstand voltage Uimp is 4kV, which confirms the high quality of workmanship and compliance with applicable safety standards. The degree of protection IP2X provides basic protection against contact with solid foreign objects. The circuit breaker does not have a short-time release or selective protection function – its main task is to provide shock and fire protection.