2CSR256040R3135 ABB DS203NCB13AC300 RCBO 3P+N B13 Type AC 300mA

Why Choose the ABB DS203NCB13AC300 RCBO?

The ABB DS203NCB13AC300 is a compact and reliable 3P+N residual current circuit breaker with overcurrent protection (RCBO) designed to protect three-phase electrical circuits against overloads, short circuits and residual earth-fault currents. As part of the advanced ABB DS203NC RCBO series, it combines residual-current and overcurrent protection within a single four-module device for efficient electrical distribution installations.

This RCBO has a rated current of 13 A, a Type B tripping characteristic and a rated residual operating current of 300 mA. Its Type AC residual-current characteristic provides detection of sinusoidal alternating residual currents, making the device suitable for appropriate AC circuits where this form of residual-current protection is specified.

The DS203NC series is engineered for modern three-phase systems where panel space is limited. Its 3P+N configuration, compact four-module width and integrated protection functions allow the DS203NC B13 AC300 to replace separate residual-current and miniature circuit-breaker devices in suitable applications, simplifying installation while providing dependable circuit protection.

Key Advantages

• Combined residual-current, overload and short-circuit protection in one device.
• 13 A rated current with Type B tripping characteristic.
• 300 mA rated residual operating current.
• Type AC residual-current detection for sinusoidal alternating residual currents.
• 3P+N configuration for three-phase circuits with neutral.
• Compact four-module design helps conserve switchboard space.

Key Features

• ABB DS203NC RCBO series.
• 13 A rated current.
• Type B tripping curve.
• 300 mA residual-current sensitivity.
• Type AC residual-current characteristic.
• 3P+N four-pole configuration.
• Three protected poles.
• Integrated test pushbutton for functional verification.
• Earth-fault indication for easier fault identification.
• Contact position indicator for clear contact-status identification.
• Compact four-module DIN-rail format.

Reliable Protection for Three-Phase Circuits

RCBOs such as the ABB DS203NCB13AC300 combine overcurrent and residual-current protection in a single modular device. This allows the circuit breaker to respond to overload and short-circuit conditions while its residual-current function detects earth-fault currents, providing comprehensive protection for suitable three-phase electrical circuits.

The DS203NC series is designed specifically for compact three-phase distribution systems. Its four-module 3P+N construction can reduce the panel space required compared with separate RCD and MCB arrangements, while features including an earth-fault indicator, contact position indicator and test pushbutton support straightforward operation, testing and fault identification.

Typical Applications

• Three-phase electrical distribution circuits.
• Commercial and industrial distribution boards.
• Electrical control panels and switchboards.
• Three-phase circuits requiring 3P+N protection.
• Circuits requiring combined overcurrent and residual-current protection.
• Building services and infrastructure electrical systems.