2CSR256440R1064 ABB DS203NC C6 APR30 RCBO 3P+N 6 A 30 mA

Why Choose the ABB DS203NC C6 APR30 RCBO?

The ABB DS203NC C6 APR30, order code 2CSR256440R1064, is a compact 3P+N residual current circuit breaker with overcurrent protection (RCBO) designed to protect three-phase circuits against overloads, short circuits and earth fault currents. Part of the ABB DS200 / DSH200 RCBO product group, this Type A APR device combines residual-current and overcurrent protection in a space-saving four-module format for commercial and industrial electrical installations.

The DS203NC C6 APR30 provides protection against sinusoidal alternating and pulsating DC residual currents while incorporating circuit-breaker protection against overload and short-circuit conditions. Its Type A APR high-immunity characteristic provides enhanced resistance to unwanted tripping, making it particularly useful in installations containing equipment that can produce transient leakage currents or disturbances while maintaining effective residual-current protection.

With a rated current of 6 A, C tripping characteristic, 30 mA rated residual operating current and 6 kA rated short-circuit breaking capacity, the DS203NC C6 APR30 provides comprehensive protection for three-phase systems with neutral. Its compact 3P+N four-module design combines multiple protection functions in a single DIN rail device.

Key Advantages

• Combined residual current, overload and short-circuit protection in one device.
• 6 A rated current with C-curve overcurrent tripping characteristic.
• 30 mA residual current sensitivity provides additional protection against direct contact.
• Type A detection for sinusoidal AC and pulsating DC residual currents.
• APR high-immunity design offers increased resistance to unwanted tripping.
• 3P+N configuration designed for three-phase circuits with neutral.
• 6 kA rated short-circuit breaking capacity according to IEC/EN 61009-1.
• Compact four-module construction helps save valuable distribution-board space.

Key Features

• ABB DS203NC RCBO series.
• 6 A rated current.
• C tripping characteristic.
• 30 mA rated residual current (IΔn).
• Type A APR residual current protection.
• High immunity to unwanted tripping with short-time delayed operation.
• 3P+N pole configuration with three protected poles.
• 400–415 V AC rated voltage.
• 6 kA rated short-circuit breaking capacity (Icn).
• 10 kA rated ultimate short-circuit breaking capacity (Icu).
• 3 kA maximum surge current withstand.
• Compact four-module DIN rail format for space-efficient switchboard installation.

High-Immunity Protection for Three-Phase Circuits

An RCBO combines residual-current protection with overload and short-circuit protection within a single device. The ABB DS203NC C6 APR30 therefore protects connected circuits against excessive current while detecting earth leakage that could present an electrical hazard. Its 30 mA residual current sensitivity also provides additional protection against direct contact.

ABB APR devices are designed to provide an optimal balance between safety and continuity of service through enhanced resistance to unwanted tripping. The APR characteristic makes this RCBO particularly suitable for commercial and industrial installations where transient disturbances could cause unnecessary operation of conventional residual-current devices.

Typical Applications

• Three-phase commercial electrical distribution systems.
• Industrial distribution boards and switchboards.
• Circuits requiring combined overcurrent and 30 mA residual-current protection.
• Installations requiring increased resistance to unwanted RCD tripping.
• Resistive and inductive three-phase loads.
• Machinery and industrial equipment distribution circuits.