Why Choose the ABB S303P-Z3NA Miniature Circuit Breaker?
The ABB S303P-Z3NA, product code 2CDS383103R0318, is a high-performance miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. As part of the dependable ABB System pro M compact S300P series, it provides reliable circuit protection for demanding applications where high breaking capacity and precise tripping performance are required.
This miniature circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromagnetic tripping mechanism for rapid short-circuit protection. Its Type Z tripping characteristic offers highly sensitive protection, making it particularly suitable for circuits containing electronic equipment, control devices, PLC systems and other components with low short-circuit withstand levels.
With a rated current of 3 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-Z3NA is suitable for three-phase industrial distribution and control circuits. Its DIN rail mounting design, integrated trip indication and compatibility with ABB System pro M compact accessories simplify installation, maintenance and system expansion.
Key Advantages
- Reliable protection against overloads and short circuits.
- 3 A rated current for low-current industrial and control circuits.
- Type Z tripping characteristic for sensitive electronic equipment.
- 3P+N configuration for three-phase circuits with a switched neutral.
- High 25 kA breaking capacity for demanding installations.
- Compact DIN rail mounting for straightforward panel installation.
Key Features
- ABB System pro M compact S300P series.
- 3 A nominal current rating.
- Type Z instantaneous tripping characteristic.
- Three protected poles plus switched neutral.
- Rated operational voltage up to 415 V AC.
- High short-circuit breaking capacity of up to 25 kA.
- Integrated trip position indicator for easier fault identification.
- Compatible with ABB System pro M compact auxiliary accessories.
Sensitive Circuit Protection for Industrial Systems
Miniature circuit breakers automatically disconnect an electrical circuit when excessive current is detected. Thermal protection responds to sustained overload conditions, while electromagnetic protection operates rapidly during short circuits, helping prevent cable damage, equipment failure and potentially hazardous electrical faults.
The Type Z characteristic of the ABB S303P-Z3NA is designed for applications requiring a particularly fast response to relatively low levels of fault current. This makes the breaker well suited to protecting sensitive electronic loads, semiconductor devices, instrumentation and industrial control equipment.
Typical Applications
- Industrial control panels and distribution boards.
- PLC, instrumentation and automation circuits.
- Electronic equipment and semiconductor protection.
- Machine control and manufacturing systems.
- Three-phase circuits with switched neutral conductors.
- Commercial and industrial electrical installations.
