2CSR273001R1504 ABB DS203 M AC-C50/0.03 RCBO 3P 50 A 30 mA 10 kA

Why Choose the ABB DS203 M AC-C50/0.03 RCBO?

The ABB DS203 M AC-C50/0.03, order code 2CSR273001R1504, is a high-performance 3-pole residual current circuit breaker with overcurrent protection (RCBO) designed to protect three-phase electrical circuits against overloads, short circuits and sinusoidal alternating earth fault currents. Part of the ABB DS200 / DSH200 RCBO product group, it combines residual-current and overcurrent protection in a factory-assembled device for commercial and industrial electrical installations.

This DS200 M series RCBO uses Type AC residual-current protection together with a C tripping characteristic. It provides protection against indirect contact and, with its 30 mA rated residual operating current, additional protection against direct contact. The C-curve characteristic is suited to circuits with moderate starting or inrush currents, making it appropriate for a broad range of commercial and industrial loads.

With a rated current of 50 A, 30 mA residual-current sensitivity and 10 kA short-circuit breaking capacity, the DS203 M AC-C50/0.03 provides robust combined protection for higher-current three-pole circuits. This 50 A version is also provided with additional terminals for remote tripping, extending its suitability for professional distribution and control applications.

Key Advantages

• Combined residual current, overload and short-circuit protection in one device.
• 50 A rated current with C-curve overcurrent tripping characteristic.
• 30 mA residual current sensitivity provides additional protection against direct contact.
• Type AC protection for sinusoidal alternating residual currents.
• 3-pole configuration for three-phase electrical circuits.
• 10 kA short-circuit breaking capacity for demanding commercial and industrial applications.
• Additional terminals for remote tripping on this 50 A version.
• DIN rail mounting enables straightforward integration into modular electrical distribution systems.

Key Features

• ABB DS200 M RCBO series.
• 50 A rated current.
• C tripping characteristic.
• 30 mA rated residual current (IΔn).
• Type AC residual-current protection.
• 3-pole configuration.
• 10 kA short-circuit breaking capacity.
• Additional terminals for remote tripping.
• Protection against overload and short-circuit currents.
• Protection against sinusoidal alternating earth fault currents.
• Protection against indirect contact and additional protection against direct contact.
• C-curve operation suited to circuits with moderate starting or inrush currents.
• Factory-assembled combined residual-current and overcurrent protection.
• Designed for commercial and industrial three-phase electrical applications.

Reliable 10 kA Three-Phase Circuit Protection

An RCBO combines residual-current protection with overload and short-circuit protection within a single device. The ABB DS203 M AC-C50/0.03 protects three-pole circuits against excessive current while also detecting sinusoidal alternating earth leakage currents, providing coordinated protection for commercial and industrial three-phase electrical distribution systems.

The DS203 M AC-C50/0.03 combines its 50 A C-curve overcurrent characteristic with 30 mA Type AC residual-current protection and a 10 kA short-circuit breaking capacity. Its additional remote-tripping terminals further enhance integration into professional distribution and control systems where remote tripping functionality is required.

Typical Applications

• Commercial three-phase electrical distribution systems.
• Industrial distribution boards and control panels.
• Circuits requiring combined 50 A overcurrent and 30 mA residual-current protection.
• Three-phase resistive and inductive loads suited to a C-curve characteristic.
• Three-pole circuits requiring Type AC residual-current protection.
• Higher-current circuits requiring a 10 kA short-circuit breaking capacity.
• Applications where additional terminals for remote tripping are beneficial.