2CCF019905R0001 ABB S803S-D0.5 High Performance MCB 50 kA 3P Type D 0.5 A

Why Choose the ABB S803S-D0.5 High Performance MCB?

The ABB S803S-D0.5 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding industrial and commercial electrical installations. As part of the ABB S800S high-performance MCB series, it combines compact modular construction with a high short-circuit breaking capacity for applications where robust circuit protection is essential.

This circuit breaker has a 0.5 A rated current and Type D tripping characteristic, providing thermal protection against sustained overloads and electromagnetic operation during severe short-circuit conditions. The Type D characteristic is particularly suited to circuits containing equipment with high starting or inrush currents, while its three protected poles enable coordinated protection of three-phase circuits.

With a specified short-circuit breaking capacity of 50 kA, the S803S-D0.5 is designed for electrical distribution systems where high prospective fault currents can occur. Its compact rail-mounted format makes it suitable for installation in industrial switchboards, distribution boards, machine control panels and automation systems.

Key Advantages

• High-performance three-pole miniature circuit breaker for demanding electrical installations.
• 0.5 A rated current for protection of low-current circuits and equipment.
• Type D tripping characteristic suitable for loads with high starting or inrush currents.
• High 50 kA short-circuit breaking capacity.
• Three protected poles for coordinated three-phase circuit protection.
• Thermal-magnetic operation provides overload and short-circuit protection.
• Compact rail-mounted construction for industrial distribution and control panels.

Key Features

• ABB S800S high-performance MCB series.
• 3-pole configuration.
• 0.5 A rated current.
• Type D tripping characteristic.
• 50 kA high short-circuit breaking capacity.
• Thermal-magnetic overcurrent protection.
• Simultaneous switching and protection of three poles.
• Designed for demanding industrial electrical distribution applications.
• Suitable for circuits with high equipment starting currents.
• Compact rail-mounted construction.

High-Performance Circuit Protection for Demanding Installations

Miniature circuit breakers protect electrical conductors and connected equipment against excessive current caused by overloads and short circuits. The ABB S800S range is engineered for applications requiring substantially higher fault-current interruption capability than conventional miniature circuit breakers, making it suitable for demanding industrial power distribution and machinery installations.

The S803S-D0.5 combines three-pole protection with a Type D characteristic. This characteristic permits higher transient starting currents before magnetic operation, making the breaker suitable for appropriate circuits supplying equipment such as transformers, motors and other loads that can produce significant inrush currents during normal start-up.

Typical Applications

• Industrial electrical distribution systems.
• Three-phase control and auxiliary circuits.
• Machinery and automation control panels.
• Transformer and inductive-load circuits.
• Circuits with high starting or inrush currents.
• Power distribution installations with high prospective fault currents.