Why Choose the ABB S303P-Z50 Miniature Circuit Breaker?
The ABB S303P-Z50 (2CDS383001R0578) is a high-performance three-pole miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the robust ABB S300P series, it combines fast fault response, high breaking performance and dependable operation for sensitive three-phase circuits.
Manufactured in accordance with international IEC and UL product standards, the S303P-Z50 is suitable for industrial control panels, switchgear assemblies, automation systems and power distribution equipment. Its compact modular construction, fail-safe terminals and DIN rail mounting help simplify installation while providing secure and reliable conductor connections.
With a rated current of 50 A, a Type Z tripping characteristic and a rated short-circuit breaking capacity of up to 25 kA, the S303P-Z50 is particularly suitable for protecting sensitive electronic equipment, PLC systems, instrumentation and semiconductor-based loads requiring rapid fault disconnection.
Key Advantages
- Industrial-grade three-pole miniature circuit breaker.
- 50 A rated current for higher-load three-phase circuits.
- Type Z tripping characteristic for sensitive electrical equipment.
- High short-circuit breaking capacity of up to 25 kA.
- Fail-safe terminals help prevent incorrect conductor installation.
- Compact DIN rail design supports efficient control-panel assembly.
Key Features
- ABB S300P series.
- Three-pole configuration.
- 50 A rated current.
- Type Z tripping characteristic.
- Rated operating voltage up to 415 V AC.
- Operating voltage up to 125 V DC.
- Short-circuit breaking capacity of up to 25 kA.
- Fail-safe screw terminals for secure wiring.
- Supply connection possible from the top or bottom.
- Compatible with ABB System pro M compact accessories.
Reliable Protection for Sensitive Electrical Equipment
The ABB S303P-Z50 automatically disconnects the electrical supply when an overload or short circuit occurs. This helps protect cables, electronic controls and connected equipment against damage while reducing the risk of production interruptions and costly system downtime.
Its Type Z tripping characteristic provides rapid magnetic operation at relatively low fault-current levels. This makes the circuit breaker particularly suitable for sensitive electronic devices, semiconductor components, instrumentation and industrial automation equipment where fast disconnection is essential.
Typical Applications
- PLC and industrial automation systems.
- Instrumentation and measurement equipment.
- Sensitive electronic circuits.
- Semiconductor and control-device protection.
- Industrial control panels and switchgear.
- Machine building and OEM equipment.
