2CCS864002R0085 ABB S804S-B8-R 8 A 4-Pole Type B High-Performance MCB 50 kA

Why Choose the ABB S804S-B8-R High-Performance MCB?

The ABB S804S-B8-R is a high-performance 4-pole miniature circuit breaker (MCB) designed to protect cables, conductors and electrical equipment against overloads and short circuits. As part of the ABB S800 high-performance circuit breaker range, it combines an 8 A rated current, Type B tripping characteristic and high short-circuit breaking performance for demanding industrial and commercial electrical installations.

The S804S-B8-R features four protected poles and a B tripping characteristic, making it suitable for circuits where comparatively low inrush currents are expected. The device uses ABB's ring-terminal connection design and provides clear ON / OFF / TRIP contact position indication for straightforward inspection and fault identification.

With a rated current of 8 A and a rated ultimate short-circuit breaking capacity of 50 kA at 415 V AC according to IEC 60947-2, the S804S-B8-R provides robust protection where high prospective fault currents may occur. Its four-pole configuration makes it particularly suitable for multi-pole industrial distribution circuits and equipment requiring simultaneous circuit protection.

Key Advantages

• High-performance 4-pole miniature circuit breaker for demanding electrical installations.
• 8 A rated current for protection of lower-current circuits.
• High 50 kA short-circuit breaking capacity at 415 V AC.
• Type B tripping characteristic for circuits with relatively low inrush currents.
• All four poles are protected for comprehensive multi-pole circuit protection.
• Clear ON / OFF / TRIP contact position indication assists operation, inspection and fault identification.

Key Features

• ABB S800 high-performance MCB range.
• Four poles with four protected poles.
• 8 A rated current.
• Type B tripping characteristic.
• 50 kA rated ultimate short-circuit breaking capacity at 415 V AC.
• Rated operational voltage up to 690 V AC according to IEC 60947-2.
• Ring-terminal connection version.
• ON / OFF / TRIP switching position indication.
• Suitable for installation with compatible ABB auxiliary and signalling accessories.
• Designed for high-performance overload and short-circuit protection.

Reliable High-Performance Circuit Protection

High-performance miniature circuit breakers such as the ABB S804S-B8-R automatically interrupt the electrical circuit when excessive current occurs because of an overload or short circuit. This helps protect cables, conductors and connected equipment from potentially damaging fault currents while supporting reliable operation of the electrical installation.

The ABB S800 range is engineered for applications requiring greater short-circuit performance than conventional miniature circuit breakers. The S804S-B8-R combines four-pole protection, Type B tripping behaviour and high breaking capacity in a robust format suitable for industrial power distribution, machinery and infrastructure applications.

Typical Applications

• Industrial electrical distribution systems.
• Machinery and automation control panels.
• Commercial and infrastructure electrical installations.
• Circuits with low or moderate switch-on current peaks.
• Manufacturing and process equipment.
• Electrical systems with high prospective short-circuit currents.