Why Choose the ABB 2CDS383103R0278 S303P-Z2NA Miniature Circuit Breaker?
The ABB 2CDS383103R0278, also known as the S303P-Z2NA, is a premium miniature circuit breaker (MCB) designed to provide highly sensitive protection against overloads and short circuits in industrial and commercial electrical installations. Part of the trusted ABB S300P System pro M compact range, it combines exceptional fault-clearing performance with international IEC and UL approvals, making it ideal for protecting sensitive electrical and electronic equipment.
Featuring a 3P+N configuration, the S303P-Z2NA protects all three phase conductors while incorporating a switched neutral pole. Its Type Z tripping characteristic is specifically engineered for electronic equipment, PLCs, instrumentation and semiconductor circuits that require extremely fast disconnection under relatively low fault currents.
With a rated current of 2 A, a rated operating voltage of 415 V AC, a 25 kA rated short-circuit breaking capacity (Icn) and a 100 kA ultimate breaking capacity (Icu), the ABB S303P-Z2NA delivers dependable protection for industrial automation systems, machine control panels, OEM equipment and specialist electrical installations.
Key Advantages
- Premium ABB miniature circuit breaker for sensitive industrial electrical protection.
- 2 A rated current with Type Z tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- 25 kA rated service breaking capacity and 100 kA ultimate breaking capacity.
- Fast magnetic tripping for sensitive electronic circuits.
- Compact DIN rail mounting for industrial control panels.
Key Features
- ABB S300P System pro M compact range.
- 2 A rated operational current.
- Type Z tripping characteristic.
- Three protected poles with switched neutral.
- 25 kA rated short-circuit breaking capacity (Icn).
- 100 kA ultimate breaking capacity (Icu).
- Suitable for AC and DC applications.
- Top or bottom supply connection.
- Contact position indication (Red ON / Green OFF).
- DIN rail mounting.
Reliable Protection for Sensitive Electronic Equipment
The ABB S303P-Z2NA combines thermal overload protection with extremely fast magnetic short-circuit protection to safeguard PLC systems, instrumentation, semiconductor devices and sensitive electronic equipment from potentially damaging electrical faults. Its high breaking capacity and dependable operation help minimise downtime while improving overall electrical safety.
Its Type Z characteristic provides significantly faster magnetic tripping than conventional Type B or Type C breakers, making it particularly suitable where even relatively small overcurrents could damage expensive electronic components or precision control equipment.
Typical Applications
- PLC and automation systems.
- Industrial instrumentation panels.
- Sensitive electronic equipment.
- Semiconductor manufacturing machinery.
- OEM control panels.
- Industrial electrical distribution systems.
