2CSR256140R2324 ABB Residual Current Circuit Breaker with Overcurrent Protection DS203NC – 3P+N – 100 mA – 32 A – C – Type A

Why Choose the ABB DS203NC C32 A100 RCBO?

The ABB 2CSR256140R2324, also identified as the DS203NC C32 A100, is a compact residual current circuit breaker with overcurrent protection (RCBO) designed for three-phase electrical distribution systems. Combining residual current, overload and short-circuit protection in one device, it helps safeguard electrical equipment, installations and users while reducing the space required inside distribution boards.

As part of ABB's System pro M compact DS203NC series, this RCBO features a 3P+N configuration within a compact four-module housing. It provides protection for all three phase conductors while switching the neutral conductor, making it suitable for commercial, industrial and infrastructure applications where reliable protection and efficient panel design are essential.

The DS203NC C32 A100 has a rated current of 32 A, a C tripping characteristic and a rated residual operating current of 100 mA. Its Type A residual current detection responds to sinusoidal AC and pulsating DC residual currents, while its rated operating voltage of 400–415 V AC supports standard three-phase power distribution systems.

Key Advantages

• Combines residual current, overload and short-circuit protection in one device.
• Compact 3P+N RCBO occupying four DIN modules.
• 32 A rated current for three-phase distribution circuits.
• 100 mA residual operating current for earth leakage protection.
• Type A residual current detection for AC and pulsating DC fault currents.
• C-curve tripping characteristic suitable for circuits with moderate inrush currents.
• High electrical and mechanical endurance for dependable operation.
• Compatible with ABB System pro M compact accessories.

Key Features

• ABB DS203NC compact RCBO series.
• 3P+N configuration with three protected poles.
• 32 A rated current.
• 100 mA rated residual current.
• Type A leakage current sensitivity.
• C tripping characteristic.
• 400–415 V AC rated operating voltage.
• 6 kA rated short-circuit capacity at 230/400 V AC.
• 10 kA ultimate short-circuit breaking capacity.
• DIN rail mounting for modular distribution boards.
• Neutral terminal positioned on the right.
• Undelayed residual current operating characteristic.

Combined Protection for Three-Phase Circuits

The ABB DS203NC C32 A100 monitors current flowing through the phase and neutral conductors while also protecting the circuit against excessive load and short-circuit currents. When a qualifying earth leakage, overload or short-circuit fault is detected, the device automatically disconnects the circuit to help reduce the risk of equipment damage, electric shock and electrical fires.

Its four-module design provides a space-efficient alternative to installing separate miniature circuit breakers and residual current devices. This makes the RCBO particularly valuable in compact switchboards, retrofit projects and distribution panels where available DIN rail space is limited.

Typical Applications

• Three-phase commercial distribution circuits.
• Industrial sockets and machinery supplies.
• Temporary electrical installations and site distribution boards.
• Power generator distribution circuits.
• Marinas, campsites and outdoor electrical infrastructure.
• Workshops and light industrial facilities.
• Commercial buildings and service installations.
• Retrofit projects requiring combined residual current and overcurrent protection.