ABB S203P-K0.3NA miniature circuit breaker from the System pro M compact S200P range featuring a 3+N pole configuration, K curve tripping characteristic, 0.3 A rated current and 25 kA breaking capacity for industrial circuit protection.
The ABB S203P-K0.3NA is a high-performance miniature circuit breaker (MCB) from the ABB System pro M compact S200P series, designed to provide reliable overload and short-circuit protection for commercial, industrial and OEM electrical installations. Featuring a K curve tripping characteristic and an ultra-low 0.3 A rated current, it is ideal for protecting sensitive control circuits, instrumentation, PLC systems and low-current auxiliary equipment.
The ABB S200P range incorporates advanced current-limiting technology with separate thermal and electromagnetic tripping mechanisms. The thermal element provides dependable overload protection, while the magnetic mechanism reacts rapidly to short-circuit faults, helping protect wiring, control components and connected equipment.
With a 3+N pole configuration, 400 V AC rated voltage and a high 25 kA short-circuit breaking capacity, the S203P-K0.3NA offers dependable protection for demanding electrical installations. Its compact DIN rail mounted design enables straightforward installation within distribution boards and industrial control panels.
The ABB S203P-K0.3NA automatically disconnects electrical circuits whenever overload or short-circuit conditions occur, helping protect sensitive wiring, instrumentation and connected equipment. Its K curve characteristic is intended for industrial applications where controlled magnetic tripping and dependable protection are required.
The ABB S200P range is widely specified by panel builders, machine manufacturers and electrical contractors thanks to its reliability, compact construction and compliance with recognised international standards.
| Current | 0.3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200P |
| Model | S203P-K0.3NA |
| Product ID | 2CDS283103R0117 |
| EAN | 4016779593229 |
| Product type | Miniature circuit breaker |
| Rated current | 0.3 A |
| Release characteristic | K curve |
| Number of poles | 3+N |
| Number of protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Voltage type | AC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 25 kA |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Pollution degree | 3 |
| Overvoltage category | III |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Built-in depth | 69 mm |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.56 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 |
The ABB S203P-K0.3NA protects three-phase plus neutral circuits against overloads and short circuits, particularly within low-current control and instrumentation applications.
This miniature circuit breaker has a rated current of 0.3 A.
K curve MCBs are intended for industrial applications with inductive loads and provide dependable protection while accommodating higher starting currents than standard B curve devices.
The S203P-K0.3NA features a 3+N pole configuration, providing protection on three poles with a switched neutral.
It is designed for installation on DIN rail inside distribution boards, industrial control panels and OEM electrical assemblies.
ABB System pro M compact miniature circuit breakers are trusted by electrical engineers, panel builders and OEM machine manufacturers for dependable circuit protection across commercial and industrial 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...