2CCS864002R0255 ABB S804S-B25-R 4-Pole 25 A Type B 50 kA Miniature Circuit Breaker

Why Choose the ABB S804S-B25-R High-Performance Miniature Circuit Breaker?

The ABB S804S-B25-R is a high-performance 4-pole miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection in demanding electrical distribution systems. Part of the proven ABB S800S high-performance circuit breaker series, it combines a 25 A rated current, B tripping characteristic and high short-circuit breaking capability for industrial and commercial electrical installations.

The S804S-B25-R uses a thermal release for sustained overload protection together with an electromechanical release for rapid short-circuit interruption. Its current-limiting construction helps restrict the energy passed through during severe faults, reducing thermal and electrodynamic stresses on cables, conductors and connected equipment.

With its 4-pole configuration, 25 A current rating and 50 kA short-circuit breaking capacity, the S804S-B25-R provides robust protection for multipole circuits in installations with high prospective fault currents. The R version features ring-terminal connections, while the B characteristic is particularly suited to circuits with relatively low normal starting or inrush currents.

Key Advantages

• High-performance 4-pole miniature circuit breaker for demanding electrical installations.
• 25 A rated current with B tripping characteristic.
• High 50 kA short-circuit breaking capacity.
• Ring-terminal connection version for secure conductor termination.
• B characteristic suited to circuits with relatively low normal inrush currents.
• Thermal overload and electromechanical short-circuit protection.
• Current-limiting operation helps reduce fault energy passed to downstream equipment.

Key Features

• ABB S800S high-performance circuit breaker series.
• 4-pole configuration.
• 25 A rated current.
• Type B tripping characteristic.
• 50 kA short-circuit breaking capacity.
• Ring-terminal connection.
• Thermal release for overload protection.
• Electromechanical release for rapid short-circuit protection.
• Current-limiting construction for effective fault-current interruption.
• Modular design for professional electrical distribution systems.

Reliable High-Performance Circuit Protection

The ABB S804S-B25-R combines thermal overload protection with rapid electromechanical short-circuit interruption. During a sustained overload, the thermal release disconnects the protected circuit before excessive heating can damage conductors or connected equipment, while severe short-circuit currents activate the electromechanical release for fast fault clearance.

The B tripping characteristic is intended for circuits where normal operating inrush currents are comparatively low. Combined with the high breaking capability and current-limiting performance of the S800S platform, the S804S-B25-R provides dependable protection for four-pole distribution and equipment circuits in demanding electrical installations.

Typical Applications

• Industrial electrical distribution boards.
• Commercial power distribution systems.
• Four-pole distribution and equipment circuits.
• Machinery and automation control panels.
• Building services electrical installations.
• Circuits with relatively low normal starting or inrush currents.
• Installations with high prospective short-circuit currents.