2CSR256140R1107 ABB DS203NCK10A30 RCBO 3P+N K10 Type A 30mA 6kA

Why Choose the ABB DS203NCK10A30 RCBO?

The ABB DS203NCK10A30 is a compact 3P+N residual current circuit breaker with overcurrent protection (RCBO) designed to protect three-phase end-user circuits against overloads, short circuits and residual earth-fault currents. Part of the ABB DS203NC series, it combines residual-current and overcurrent protection within a single four-module device for efficient commercial and industrial electrical distribution.

This RCBO has a rated current of 10 A, a Type K tripping characteristic and a rated residual operating current of 30 mA. Its Type A residual-current characteristic detects sinusoidal alternating and pulsating DC residual currents, providing protection for modern electrical circuits where these residual-current waveforms may occur.

With a rated voltage of 415 V AC and a rated short-circuit breaking capacity of 6 kA, the DS203NC K10 A30 provides integrated protection for three-phase plus neutral circuits. Its Type K characteristic is particularly suited to appropriate circuits with higher starting or inrush currents, while its compact four-module construction helps conserve valuable distribution-board space.

Key Advantages

• Combined residual-current, overload and short-circuit protection in one device.
• 10 A rated current with Type K tripping characteristic.
• 30 mA residual-current sensitivity for additional protection in suitable installations.
• Type A residual-current detection for sinusoidal AC and pulsating DC residual currents.
• 3P+N four-pole configuration with three protected poles.
• 6 kA rated short-circuit breaking capacity according to IEC/EN 61009.

Key Features

• ABB DS203NC RCBO series.
• 10 A rated current.
• Type K tripping curve.
• 30 mA rated residual operating current.
• Type A residual-current characteristic.
• Detection of sinusoidal alternating and pulsating DC residual currents.
• 3P+N four-pole configuration with three protected poles.
• 415 V AC rated voltage.
• 6 kA rated short-circuit breaking capacity (Icn).
• 10 kA short-circuit breaking capacity according to IEC 60947-2.
• 50/60 Hz rated frequency.
• Compact four-module DIN-rail design.

Reliable Type A Protection for Three-Phase Circuits

The ABB DS203NCK10A30 combines overcurrent and residual-current protection within one modular device. Its overcurrent function protects against overload and short-circuit currents, while its Type A residual-current function responds to sinusoidal alternating and pulsating DC earth-fault currents that can occur in modern electrical installations.

With a residual-current sensitivity of 30 mA, the DS203NCK10A30 provides protection against indirect contact and additional protection against direct contact where applicable. Its Type K characteristic makes it suitable for appropriate loads with comparatively high starting currents, while the four-module 3P+N format provides comprehensive protection without requiring separate overcurrent and residual-current devices.

Typical Applications

• Three-phase end-user electrical circuits.
• Commercial and industrial distribution boards.
• Electrical control panels and switchboards.
• Appropriate motor and transformer circuits with higher starting currents.
• Circuits containing equipment capable of producing pulsating DC residual currents.
• Three-phase circuits requiring combined Type K overcurrent and Type A residual-current protection.