ABB S303P-K32NA 32A Type K miniature circuit breaker with 3P+N configuration and 25 kA breaking capacity for industrial electrical protection.
£231.23
The ABB 2CDS383103R0537, also identified as the S303P-K32NA, is a robust miniature circuit breaker (MCB) engineered to protect industrial electrical installations against overloads and short circuits. As part of the trusted ABB System pro M compact S300P series, it delivers high breaking performance and dependable protection for demanding industrial power distribution applications.
Featuring a Type K tripping characteristic, this breaker is particularly suitable for circuits supplying motors, transformers and other inductive loads that generate high inrush currents during start-up. Its combined thermal and magnetic trip mechanism ensures reliable overload protection and rapid fault interruption to minimise equipment damage and downtime.
With a rated current of 32 A, a 3P+N configuration and a rated operational voltage of up to 415 V AC, the S303P-K32NA is ideal for industrial control panels, switchboards and machine installations. Its 25 kA breaking capacity and compact DIN rail mounting design simplify installation while providing exceptional protection performance.
The ABB S303P-K32NA automatically disconnects electrical circuits when overload or short-circuit conditions occur, helping to protect valuable equipment, wiring and electrical infrastructure. Its industrial-grade construction provides dependable protection for demanding environments where reliability is essential.
Its Type K operating characteristic makes it especially suitable for motors, transformers, compressors, pumps and other inductive loads that require higher magnetic trip thresholds to avoid nuisance tripping during start-up while maintaining excellent fault protection.
| Current | 32 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S300P |
| Model | S303P-K32NA |
| Product ID | 2CDS383103R0537 |
| EAN | 4016779076845 |
| Product type | Miniature circuit breaker |
| Rated current | 32 A |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Tripping characteristic | Type K |
| Rated operational voltage | 415 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated insulation voltage | 500 V |
| Impulse withstand voltage | 6 kV |
| Ultimate short-circuit breaking capacity | 25 kA |
| Protection rating | IP20 |
| Mounting type | 35 mm DIN rail |
| Terminal capacity | 0.75 to 35 mm² |
| Operating temperature | -40 to +70 °C |
| Approximate dimensions (H × W × D) | 88 × 70 × 69 mm |
| Approximate weight | 0.50 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase industrial electrical circuits against overloads and short circuits, particularly where motors and inductive equipment are installed.
The ABB S303P-K32NA has a 32 A rated current.
Type K breakers are designed for circuits with higher inrush currents, making them ideal for motors, transformers and other inductive loads.
The breaker provides a rated ultimate breaking capacity of 25 kA under IEC 60947-2.
The S303P-K32NA mounts onto a standard 35 mm DIN rail inside industrial control panels and distribution boards.
ABB System pro M compact S300P miniature circuit breakers are trusted worldwide for delivering dependable protection, high breaking performance and long-term reliability in industrial electrical installations.
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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...