2CCG001765R0001 ABB FS402MKB250.03 FS402MK-B25/0.03 RCBO 2P Type F 25 A 30 mA

Why Choose the ABB FS402MKB250.03 RCBO?

The ABB FS402MKB250.03, type designation FS402MK-B25/0.03, is a compact 2-pole residual current circuit breaker with overcurrent protection (RCBO) designed for the ABB SMISSLINE TP plug-in system. It combines overload, short-circuit and residual-current protection in a single device for single-phase electrical distribution circuits.

This FS402 series RCBO has a 25 A rated current, B tripping characteristic and 30 mA rated residual operating current. It uses a Type F AP-R high-immunity residual-current characteristic, providing enhanced resistance to unwanted tripping and protection suitable for circuits containing modern electronic loads.

With a 240 V AC rated operational voltage and 10 kA rated short-circuit breaking capacity according to IEC/EN 61009-1, the FS402MK-B25/0.03 provides dependable combined circuit protection. Its protected neutral and SMISSLINE TP plug-in construction support efficient installation and servicing, while the DTI function provides clear differential-trip indication.

Key Advantages

• Combines residual-current, overload and short-circuit protection in one device.
• 25 A rated current with B tripping characteristic.
• 30 mA residual-current sensitivity for additional protection against electric shock.
• Type F AP-R high-immunity protection suitable for modern electronic loads.
• 10 kA breaking capacity according to IEC/EN 61009-1.
• 2-pole configuration with protected neutral.
• DTI differential-trip indication assists fault identification and maintenance.
• Direct plug-in connection to the ABB SMISSLINE TP system.

Key Features

• ABB FS402 series RCBO.
• 2-pole configuration.
• 25 A rated current.
• B tripping characteristic.
• 30 mA rated residual operating current.
• Type F AP-R residual-current characteristic.
• High-immunity design for increased resistance to unwanted tripping.
• 240 V AC rated operational voltage.
• 10 kA Icn rated breaking capacity according to IEC/EN 61009-1.
• 15 kA Icu ultimate short-circuit breaking capacity according to IEC/EN 60947-2.
• 7.5 kA Ics service short-circuit breaking capacity.
• 500 V rated insulation voltage.
• 50 / 60 Hz rated frequency.
• Three-module plug-in format for the SMISSLINE TP system.

Reliable Protection for SMISSLINE Distribution Systems

RCBOs combine the protective functions of a miniature circuit breaker and a residual-current protective device. The ABB FS402MK-B25/0.03 protects single-phase circuits against overload and short-circuit currents while also detecting residual currents, providing circuit, fault and additional personal protection within one compact device.

The SMISSLINE TP plug-in architecture allows compatible protective devices to connect directly to the socket system, supporting efficient installation, replacement and servicing. The Type F AP-R high-immunity characteristic is well suited to circuits containing electronic equipment that can generate complex residual-current waveforms, while the 30 mA sensitivity provides additional protection against electric shock.

Typical Applications

• ABB SMISSLINE TP electrical distribution boards.
• Single-phase final circuits requiring combined RCBO protection.
• Industrial control and power distribution panels.
• Commercial and building electrical distribution.
• Circuits requiring combined overcurrent and 30 mA residual-current protection.
• Circuits supplying modern electronic, resistive and inductive loads.