ABB S304P-D3 MCB – 4P – D Curve – 3A – 25kA

Why Choose the ABB S304P-D3 Miniature Circuit Breaker?

The ABB S304P-D3 is a robust and high-performance miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial electrical installations. As part of the ABB System pro M compact S300P series, it combines high breaking capacity with dependable circuit protection for demanding electrical distribution applications.

This circuit breaker features a D tripping characteristic, making it suitable for circuits where higher short-duration inrush currents can occur. Its 4-pole configuration provides protection across four conductors without a neutral pole, while the compact modular design enables straightforward installation in distribution boards and control panels.

With a rated current of 3 A and a rated breaking capacity of 25 kA, the S304P-D3 provides dependable protection for industrial circuits requiring a high level of short-circuit interruption performance. Its DIN-rail mounting and compatibility with the System pro M compact accessory range simplify installation and system integration.

Key Advantages

• High-performance miniature circuit breaker for industrial electrical installations.
• 3 A rated current for protection of low-current electrical circuits.
• D tripping characteristic suitable for circuits with higher inrush currents.
• 25 kA rated breaking capacity for high-level short-circuit protection.
• 4-pole configuration for three-phase and multi-conductor circuit protection without neutral switching.
• DIN-rail mounting for straightforward installation in electrical distribution equipment.

Key Features

• ABB System pro M compact S300P series.
• S304P-D3 miniature circuit breaker.
• 3 A rated current.
• D tripping characteristic.
• 25 kA rated breaking capacity.
• 4-pole configuration without neutral.
• AC electrical supply.
• DIN-rail mounting for modular electrical installations.
• Integrated trip indication for clear identification of tripping events.
• Compatible with System pro M compact accessories.

Reliable Circuit Protection for Industrial Installations

Miniature circuit breakers such as the ABB S304P-D3 protect electrical circuits by interrupting current when an overload or short-circuit condition occurs. The D characteristic provides a delayed magnetic response compared with lower trip characteristics, helping accommodate circuits where equipment can generate higher starting or inrush currents.

The S300P series is designed for industrial electrical installations where reliable protection and high short-circuit interruption performance are required. The S304P-D3 combines four protected poles in a compact modular device, making it suitable for three-phase distribution and control circuits where a neutral pole is not required.

Typical Applications

• Industrial electrical distribution systems.
• Three-phase machinery and equipment circuits.
• Control panels and industrial switchboards.
• Motor and transformer circuits with higher inrush currents.
• Factory automation and production equipment.
• Commercial and industrial low-voltage installations.