ABB S303P-Z2NA miniature circuit breaker with a 2 A rating, Type Z tripping characteristic, 3P+N configuration and 25 kA breaking capacity for protecting sensitive industrial electrical equipment.
£268.21
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.
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.
| Current | 2 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-Z2NA |
| Manufacturer Part Number | 2CDS383103R0278 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Rated Current | 2 A |
| Tripping Characteristic | Type Z |
| Pole Configuration | 3P+N |
| Protected Poles | 3 |
| Rated Voltage | Up to 415 V AC |
| Maximum Operating Voltage | 480Y/277 V AC, 125 V DC |
| Voltage Type | AC/DC |
| Frequency | 50 / 60 Hz |
| Rated Short-Circuit Breaking Capacity (Icn) | 25 kA |
| Ultimate Breaking Capacity (Icu) | 100 kA |
| Rated Insulation Voltage (Ui) | 500 V |
| Impulse Withstand Voltage (Uimp) | 6 kV |
| Energy Limiting Class | 3 |
| Protection Rating | IP20 |
| Terminal Capacity | 0.75–35 mm² rigid, 0.75–25 mm² flexible |
| Mounting | DIN Rail |
| Operating Temperature | -40°C to +70°C |
| Electrical Endurance | 20,000 operating cycles |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Weight | Approx. 0.496 kg |
| EAN | 4016779077118 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects sensitive three-phase electrical circuits against overloads and short circuits, particularly PLCs, instrumentation systems and electronic equipment.
The ABB S303P-Z2NA has a rated operational current of 2 A.
Type Z circuit breakers provide extremely fast magnetic tripping, making them ideal for protecting highly sensitive electronic circuits with low overcurrent tolerance.
The breaker provides a rated short-circuit breaking capacity of 25 kA and an ultimate breaking capacity of 100 kA.
It is designed for installation on a standard DIN rail inside industrial control panels, switchboards and electrical distribution boards.
ABB S300P miniature circuit breakers are trusted by industrial engineers, panel builders and OEM manufacturers worldwide for delivering dependable overload and short-circuit protection in demanding industrial installations and sensitive electronic control systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...