Why Choose the ABB S303P-Z3 Miniature Circuit Breaker?
The ABB S303P-Z3 is a high-performance three-pole miniature circuit breaker (MCB) engineered to protect sensitive electrical circuits against overloads and short circuits. As part of the trusted ABB System pro M compact S300P series, it delivers precise circuit protection, high fault interruption capability and dependable long-term reliability for industrial, commercial and OEM installations.
Manufactured in accordance with international IEC, UL and CSA standards, the S303P-Z3 features a compact DIN rail mounted design that enables fast installation inside switchboards, control panels and distribution boards. Its robust construction, secure screw terminals and front trip indication simplify installation and maintenance while ensuring safe operation.
Featuring a 3 A rated current, a Z curve tripping characteristic and a 25 kA breaking capacity, this miniature circuit breaker is particularly suited to protecting electronic equipment, semiconductor devices, PLCs, instrumentation and other sensitive circuits that require rapid disconnection at relatively low overcurrent levels.
Key Advantages
- Compact three-pole miniature circuit breaker for sensitive electrical circuits.
- 3 A rated current for precise low-current protection.
- Z curve tripping characteristic designed for electronic and control circuits.
- 25 kA breaking capacity for demanding industrial fault protection.
- Manufactured to IEC, UL and CSA standards.
- Quick installation on standard 35 mm DIN rail.
Key Features
- ABB System pro M compact S300P series.
- 3 A rated current.
- Three protected poles.
- Z curve tripping characteristic.
- 415 V AC rated operational voltage.
- 25 kA rated short-circuit breaking capacity (Icn).
- IP20 protection rating.
- 35 mm DIN rail mounting.
Rapid Protection for Sensitive Electrical Equipment
The ABB S303P-Z3 automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping to protect wiring, control equipment and sensitive electronic devices from damage. Its Z curve characteristic provides magnetic tripping at lower overcurrent levels than B, C, D or K curve circuit breakers, making it particularly suitable for delicate electronic applications.
The ABB S300P range is trusted worldwide by panel builders, automation specialists and industrial electrical contractors for its dependable performance, high fault interruption capability and compliance with international standards.
Typical Applications
- Electronic equipment and semiconductor circuits.
- PLC and industrial automation control panels.
- Instrumentation and measurement systems.
- Low-current control circuits.
- OEM machinery and production equipment.
- Commercial and industrial electrical distribution.
