2CSR256240R2164 ABB DS203NCC16AS100 DS203NC C16 A S100 3P+N Type A Selective RCBO 16A 100mA

Why Choose the ABB DS203NCC16AS100 RCBO?

The ABB DS203NCC16AS100 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 ABB DS203NC series, it combines overcurrent and residual-current protection in a single modular device for efficient commercial and industrial electrical distribution.

This RCBO features a 16 A rated current, C tripping characteristic and Type A selective (S) residual-current protection. The Type A function detects sinusoidal AC and pulsating DC residual currents, while the selective time-delay characteristic supports discrimination with downstream residual-current protective devices in coordinated installations.

With a rated residual operating current of 100 mA and a rated short-circuit breaking capacity of 6 kA according to EN/IEC 61009, the DS203NCC16AS100 provides coordinated protection in a compact 3P+N four-module format. Its C characteristic is suitable for circuits with moderate inrush currents, including many commercial and industrial loads.

Key Advantages

• Combined residual-current, overload and short-circuit protection in one device.
• 3P+N configuration for three-phase circuits with neutral.
• 16 A rated current with C tripping characteristic.
• 100 mA Type A selective (S) residual-current protection.
• Selective time-delay operation supports discrimination with downstream RCDs and RCBOs.
• 6 kA rated short-circuit breaking capacity according to EN/IEC 61009.
• Compact four-module construction helps conserve distribution-board space.
• DIN-rail design simplifies integration into modular electrical distribution systems.

Key Features

• ABB DS203NC RCBO series.
• 3P+N configuration with three protected poles.
• 16 A rated current.
• C tripping characteristic.
• Type A selective (S) residual-current characteristic.
• 100 mA rated residual operating current.
• 400–415 V AC rated voltage.
• 50/60 Hz rated frequency.
• 6 kA Icn breaking capacity according to EN/IEC 61009.
• 10 kA ultimate short-circuit breaking capacity according to IEC 60947-2.
• Integrated test functionality for verification of residual-current operation.
• Compact four-module DIN-rail format.

Reliable Selective Protection for Three-Phase Circuits

RCBOs combine the protective functions of a miniature circuit breaker and a residual-current device in one unit. The ABB DS203NCC16AS100 responds to overload and short-circuit conditions while monitoring residual current to earth, providing coordinated protection for conductors, connected equipment and electrical installations.

The selective Type A characteristic adds a deliberate time delay to residual-current operation, helping coordinate the DS203NCC16AS100 with downstream residual-current devices. This can improve discrimination in multi-level distribution systems by allowing an appropriate downstream protective device to clear a local residual-current fault before an upstream selective device operates.

Typical Applications

• Three-phase commercial electrical distribution systems.
• Industrial electrical distribution boards.
• Distribution circuits requiring selective residual-current protection.
• Circuits coordinated with downstream RCDs or RCBOs.
• Three-phase loads requiring Type A residual-current detection.
• Compact switchboards and modular DIN-rail distribution equipment.