2CSR252001R1205 ABB DS202 AC-B20/0.03 RCBO 2 Pole 20 A 30 mA 6 kA

Why Choose the ABB DS202 AC-B20/0.03 RCBO?

The ABB DS202 AC-B20/0.03 is a compact and reliable two-pole residual current circuit breaker with overcurrent protection (RCBO) designed to protect electrical circuits against overloads, short circuits and AC residual currents. As part of the ABB DS200 RCBO series, it combines miniature circuit breaker and residual-current protection functions in a single DIN-rail device.

This RCBO combines a Type B overcurrent tripping characteristic with Type AC residual-current detection, making it suitable for circuits with relatively low inrush currents. Providing both overcurrent and earth-leakage protection at individual circuit level helps simplify distribution-board design while allowing faults to be isolated to the affected circuit.

With a rated current of 20 A, a rated residual operating current of 30 mA and a rated short-circuit capacity of 6 kA, the DS202 AC-B20/0.03 provides comprehensive protection for suitable final circuits in residential, commercial and similar electrical installations. Its two-pole configuration provides switching of both conductors.

Key Advantages

• Combined overload, short-circuit and residual-current protection in one device.
• 20 A rated current for suitable final circuits.
• 30 mA residual-current sensitivity for additional protection against electric shock.
• Type AC residual-current characteristic for sinusoidal AC residual currents.
• Type B tripping characteristic suitable for circuits with relatively low inrush currents.
• 6 kA short-circuit breaking capacity for dependable fault protection.

Key Features

• ABB DS200 RCBO series.
• 20 A rated current.
• 30 mA rated residual operating current.
• B-curve overcurrent characteristic.
• Type AC residual-current characteristic.
• Two-pole configuration.
• 6 kA rated short-circuit capacity.
• Compact DIN-rail format combining residual-current and overcurrent protection.

Combined Residual-Current and Overcurrent Protection

An RCBO combines the functions of a miniature circuit breaker and a residual current device. It disconnects the protected circuit when an overload or short circuit occurs and also operates when residual current to earth exceeds its specified threshold, providing comprehensive electrical protection within one modular device.

The ABB DS202 AC-B20/0.03 uses a B-curve overcurrent characteristic and Type AC residual-current detection. Its 30 mA residual-current sensitivity provides additional protection for appropriate final circuits, while individual RCBO protection can help prevent a fault on one circuit from unnecessarily disconnecting other independently protected circuits.

Typical Applications

• Residential electrical distribution boards.
• Commercial and similar electrical installations.
• Lighting circuits with relatively low starting currents.
• General final circuits within the device rating.
• Circuits requiring combined overcurrent and residual-current protection.
• DIN-rail distribution systems requiring individual circuit protection.