Why Choose the ABB 2CDS383103R0578 S303P-Z50NA Miniature Circuit Breaker?
The ABB 2CDS383103R0578, also identified as the S303P-Z50NA, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in industrial electrical installations. As part of the renowned ABB System pro M compact S300P series, it delivers outstanding reliability, high breaking performance and compliance with international IEC, UL and CSA standards for demanding industrial environments.
Featuring a Type Z tripping characteristic, this circuit breaker is specifically designed to protect sensitive electronic equipment, semiconductor devices, PLCs, instrumentation and control circuits. Its rapid magnetic trip response helps minimise fault energy and protects valuable equipment from damage while providing dependable thermal overload protection.
With a rated current of 50 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-Z50NA is ideal for industrial control panels, switchboards and OEM machinery. Its 25 kA breaking capacity, compact DIN rail mounting and robust construction make it suitable for demanding industrial applications.
Key Advantages
- Industrial miniature circuit breaker for overload and short-circuit protection.
- 50 A rated current for demanding industrial electrical systems.
- 3P+N pole configuration for three-phase systems with neutral.
- Type Z tripping characteristic for sensitive electronic equipment.
- 25 kA ultimate short-circuit breaking capacity.
- Rapid magnetic tripping helps protect sensitive electrical devices.
- Bi-directional terminals simplify installation.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S300P series.
- S303P-Z50NA model.
- 50 A rated current.
- 415 V AC rated operational voltage.
- 3P+N pole arrangement.
- Type Z tripping characteristic.
- 25 kA ultimate short-circuit breaking capacity.
- 50 / 60 Hz operation.
- 35 mm DIN rail mounting.
- Contact position and trip indication.
Reliable Protection for Sensitive Electrical Equipment
The ABB S303P-Z50NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect wiring, industrial control equipment and connected electronic devices. Its industrial-grade construction provides dependable long-term performance in demanding environments.
Its Type Z tripping characteristic is intended for circuits containing sensitive electronic equipment that requires rapid fault clearance. This makes it an excellent choice for PLC systems, instrumentation, semiconductor devices, communication systems and precision automation equipment.
Typical Applications
- Industrial control panels.
- PLC and automation systems.
- Electronic control equipment.
- Instrumentation and semiconductor circuits.
- Commercial electrical distribution.
- Factory automation.
- OEM machinery and machine building.
