Why Choose the ABB S303P-D50 Miniature Circuit Breaker?
The ABB S303P-D50 is a compact three-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits. As part of the ABB System pro M compact S300P series, it provides high-performance circuit protection with a D tripping characteristic for applications where higher inrush currents can occur.
The S300P series is designed for demanding electrical protection applications and combines high short-circuit breaking capacity with a modular construction suited to distribution boards and control panels. Its compact design supports straightforward installation, while compatibility with the System pro M compact accessory range allows additional functionality where required.
With a 50 A rated current, three-pole configuration and 25 kA rated breaking capacity, the S303P-D50 is suitable for AC circuit protection where a D characteristic is required. Its modular format and DIN-rail mounting make it practical for compact low-voltage distribution installations.
Key Advantages
- Compact miniature circuit breaker designed for demanding circuit protection applications.
- 50 A rated current for higher-current circuit protection.
- Three-pole configuration for three-phase AC circuit protection.
- D tripping characteristic suitable for circuits with higher starting or inrush currents.
- 25 kA rated breaking capacity for high-performance short-circuit protection.
- DIN-rail mounting enables straightforward installation in distribution boards and control panels.
Key Features
- ABB System pro M compact S300P series.
- 50 A rated current.
- 3-pole construction with no neutral pole.
- D tripping characteristic.
- 25 kA rated breaking capacity.
- AC supply for low-voltage electrical installations.
- Thermal and electromechanical overcurrent protection.
- High short-circuit breaking capacity for demanding applications.
- DIN-rail mounting for distribution boards and control panels.
- Compatible with the System pro M compact accessory range.
- Modular construction occupying three standard modules.
High-Performance Circuit Protection for Electrical Installations
Miniature circuit breakers such as the ABB S303P-D50 protect electrical circuits by responding to excessive current conditions. The thermal release provides delayed protection against overloads, while the electromechanical release responds rapidly to short-circuit conditions, helping protect conductors and connected equipment.
The S300P series is designed for demanding commercial and industrial applications. Its D tripping characteristic is intended for circuits where equipment can generate higher starting or inrush currents, while the high breaking capacity provides robust short-circuit protection.
Typical Applications
- Industrial electrical distribution systems.
- Commercial building distribution boards.
- Three-phase control panels and automation installations.
- Circuits supplying equipment with higher inrush currents.
- Industrial machinery and equipment circuits.
- Low-voltage AC three-phase circuit protection.
