ABB S303P-K1.6NA miniature circuit breaker with a 1.6 A rating, Type K tripping characteristic, 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£249.05
The ABB 2CDS383103R0257, also known as the S303P-K1.6NA, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in demanding industrial electrical installations. As part of the proven ABB S300P System pro M compact range, it delivers outstanding fault-clearing performance, high reliability and compliance with international IEC and UL standards.
Featuring a 3P+N configuration, the S303P-K1.6NA protects all three phase conductors while incorporating a switched neutral pole. Its Type K tripping characteristic is specifically designed for circuits with high inrush currents, making it ideal for motors, transformers, contactors, solenoids and other inductive industrial loads.
With a rated current of 1.6 A, a maximum operating voltage of 415 V AC, and a 25 kA rated short-circuit breaking capacity (100 kA ultimate breaking capacity), the ABB S303P-K1.6NA provides exceptional protection for industrial control panels, switchboards, OEM machinery and automation systems.
The ABB S303P-K1.6NA combines thermal overload protection with instantaneous magnetic short-circuit protection to safeguard industrial equipment, cabling and distribution systems. This dual protection minimises downtime while improving electrical safety and equipment longevity.
Its Type K characteristic allows significantly higher transient starting currents than conventional Type B or Type C breakers, making it particularly suitable for motor circuits, transformers, magnetic coils and industrial automation equipment where nuisance tripping must be avoided.
| Current | 1.6 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S300P System pro M compact |
| Model | S303P-K1.6NA |
| Manufacturer Part Number | 2CDS383103R0257 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Rated Current | 1.6 A |
| Tripping Characteristic | Type K |
| 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 |
| 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 |
| Dimensions (H × W × D) | Approx. 88 × 70 × 69 mm |
| Weight | Approx. 0.496 kg |
| EAN | 4016779077149 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase industrial electrical circuits against overloads and short circuits, particularly those supplying motors, transformers and other inductive equipment.
The ABB S303P-K1.6NA has a rated operational current of 1.6 A.
Type K circuit breakers tolerate higher inrush currents than standard breakers while still providing rapid protection during genuine fault conditions.
The breaker provides a rated short-circuit breaking capacity of 25 kA with an ultimate breaking capacity of 100 kA.
It is designed for installation on a standard DIN rail inside industrial switchboards, control panels and electrical distribution boards.
ABB S300P miniature circuit breakers are trusted by industrial engineers, machine builders and panel manufacturers worldwide for dependable overload and short-circuit protection in demanding electrical applications.
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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...