Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
2CDS273334R0357 ABB ST203M-K5 MCB 15kA 3P K 5A UL1077
ABB ST203M-K5 is a 5 A three-pole K-characteristic miniature circuit breaker with a 15 kA short-circuit breaking capacity designed for supplementary protection of industrial electrical equipment and inductive loads.
£93.65
Why Choose the ABB ST203M-K5 Miniature Circuit Breaker?
The ABB ST203M-K5 is a robust three-pole miniature circuit breaker (MCB) designed to provide dependable supplementary overcurrent and short-circuit protection for industrial equipment, machinery and electrical control systems. As part of the ABB ST200M miniature circuit breaker series, it combines reliable circuit protection with a compact modular format for professional DIN-rail installations.
Featuring a K tripping characteristic, the ST203M-K5 is particularly suited to circuits containing inductive loads and equipment that can produce elevated short-duration starting currents. This makes it a practical choice for motors, transformers, solenoids, control equipment and other industrial loads where normal energisation can create temporary current peaks.
With a rated current of 5 A, a three-pole configuration and a short-circuit breaking capacity of 15 kA, the ST203M-K5 provides robust supplementary protection for low-current three-pole equipment circuits. ABB order code 2CDS273334R0357 identifies this specific 5 A K-characteristic model within ABB's UL 1077 miniature circuit breaker range.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial equipment and control applications.
- 5 A rated current suitable for low-current machinery, automation and auxiliary circuits.
- 15 kA short-circuit breaking capacity for robust fault protection.
- K tripping characteristic suited to inductive loads and circuits with elevated starting currents.
- Designed for UL 1077 supplementary circuit protection applications.
- DIN-rail format supports straightforward integration into industrial electrical panels and equipment.
Key Features
- ABB ST200M miniature circuit breaker series.
- 5 A rated current.
- 3-pole configuration.
- K tripping characteristic.
- 15 kA short-circuit breaking capacity.
- Thermal-magnetic circuit protection.
- Designed for UL 1077 supplementary protection.
- Compact modular construction for DIN-rail installation.
Reliable Circuit Protection for Inductive Loads
Miniature circuit breakers such as the ABB ST203M-K5 automatically interrupt electrical current when an overload or short-circuit condition occurs. This helps protect conductors and connected equipment while providing resettable circuit protection that supports convenient fault recovery and maintenance in industrial installations.
The K-characteristic response makes the ST203M-K5 particularly useful for inductive equipment where normal operation can produce elevated short-duration starting currents. Combined with its 5 A rating and three-pole construction, it is well suited to supplementary protection of motors, transformers, solenoids, industrial controls and automation equipment.
Typical Applications
- Industrial machinery and automation equipment.
- Electrical control panels and cabinets.
- Low-current three-pole equipment circuits.
- Motor and actuator control circuits.
- Transformers, solenoids and other inductive loads.
- OEM machinery requiring UL 1077 supplementary protection.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| Order code | 2CDS273334R0357 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 5 A | |
| Number of poles | 3 | |
| Number of protected poles | 3 | |
| Tripping characteristic | K | |
| Short-circuit breaking capacity | 15 kA | |
| Protection principle | Thermal-magnetic | |
| Standard / product group | UL 489 / UL 1077 MCB | |
| Application standard | UL 1077 | |
| Mounting type | DIN rail | |
| Modular width | 3 modules |
Frequently Asked Questions
What is the ABB ST203M-K5 used for?
The ST203M-K5 is a three-pole miniature circuit breaker designed to provide supplementary overload and short-circuit protection for industrial equipment, control systems and circuits containing inductive loads.
What is the rated current of the ST203M-K5?
The ABB ST203M-K5 has a rated current of 5 A.
What does the K characteristic mean?
The K tripping characteristic is suited to circuits containing inductive loads and equipment with elevated short-duration starting currents, making it useful for motors, transformers, solenoids and industrial control equipment.
What is the breaking capacity of the ST203M-K5?
The ST203M-K5 has a 15 kA short-circuit breaking capacity, providing robust fault protection for suitable industrial equipment and supplementary circuit-protection applications.
What is the ABB order code for the ST203M-K5?
The ABB order code for the ST203M-K5 5 A three-pole K-characteristic MCB is 2CDS273334R0357.
Trusted Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial machinery, electrical panels and automation equipment, combining reliable protection performance with a modular DIN-rail design.
