2CSR255163R1204 ABB DS301C C20 A30 RCBO 1P+N Type A 30mA 20A 6kA

Why Choose the ABB DS301C C20 A30 RCBO?

The ABB DS301C C20 A30 is a compact 1P+N residual current circuit breaker with overcurrent protection (RCBO) designed to protect single-phase final circuits against overloads, short circuits and residual earth fault currents. Part of the ABB System pro M compact DS301C series, it combines overcurrent and residual-current protection within a single-module device, helping maximise available space inside electrical distribution boards.

This RCBO provides Type A residual-current protection, responding to both sinusoidal alternating and pulsating DC residual currents. Its 30 mA rated residual operating current provides additional protection against electric shock, while ABB's voltage-independent electromechanical design allows the residual-current protection function to operate independently of the supply voltage.

With a rated current of 20 A, C tripping characteristic and 6 kA rated short-circuit breaking capacity, the DS301C C20 A30 is suitable for final circuits where moderate starting or inrush currents may occur. Integrated contact-position and earth-fault indication further assist fault identification and maintenance in residential, commercial, building and industrial installations.

Key Advantages

• Combines residual-current, overload and short-circuit protection in one compact device.
• 20 A rated current with C-curve overcurrent protection.
• 30 mA residual-current sensitivity for additional protection against electric shock.
• Type A protection detects sinusoidal AC and pulsating DC residual currents.
• 6 kA short-circuit breaking capacity.
• Voltage-independent electromechanical residual-current protection.
• Compact 17.6 mm single-module design maximises available DIN-rail space.

Key Features

• ABB DS301C RCBO series.
• 20 A rated current.
• C tripping characteristic.
• Type A residual-current protection.
• 30 mA rated residual operating current.
• 6 kA rated short-circuit breaking capacity.
• 1P+N pole configuration.
• 230–240 V AC, 50 Hz rated supply.
• Contact-position indication for easier status identification.
• Earth-fault indication for faster fault diagnosis.
• Compact one-module DIN-rail construction.

Compact Type A Protection for Modern Final Circuits

An RCBO combines the functions of a miniature circuit breaker and residual current device within a single protective unit. The ABB DS301C C20 A30 protects connected single-phase circuits against overload and short-circuit currents while also detecting sinusoidal alternating and pulsating DC residual earth fault currents. This Type A capability makes it suitable for many modern electrical loads incorporating electronic components.

The DS301C series occupies only one standard DIN-rail module, helping installers maximise usable distribution-board space while providing individual protection for each final circuit. Its C-curve characteristic accommodates moderate starting currents, while the 30 mA residual-current sensitivity provides additional protection against direct contact and the voltage-independent design supports dependable fault protection.

Typical Applications

• Residential electrical distribution boards.
• Commercial building final circuits.
• General-purpose single-phase power circuits.
• Lighting and building-services circuits with moderate inrush currents.
• Circuits supplying electronic equipment capable of producing pulsating DC residual currents.
• Industrial control and distribution panels.