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2CDS273334R0377 ABB ST203M-K6 Miniature Circuit Breaker 6 A 3P K 15 kA
ABB ST203M-K6 is a 6 A three-pole K characteristic UL 1077 miniature circuit breaker from the ST200M series, designed for supplementary overcurrent and short-circuit protection in industrial electrical equipment.
£93.65
Why Choose the ABB ST203M-K6 Miniature Circuit Breaker?
The ABB ST203M-K6 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable overcurrent and short-circuit protection in industrial electrical control and distribution systems. As part of the ABB ST200M miniature circuit breaker series, it is a supplementary protector manufactured for applications requiring dependable circuit protection and a compact DIN-rail-mounted format.
This breaker combines a 6 A rated current with a K tripping characteristic, making it particularly suitable for circuits containing inductive loads where higher starting currents can occur. Its three-pole configuration enables simultaneous protection of three conductors, making it well suited to three-phase machinery, control panels and industrial equipment.
The ST203M-K6 is rated as a UL 1077 supplementary protector and provides a breaking capacity of up to 15 kA under applicable IEC conditions. ABB's modular ST200M platform is designed for straightforward DIN-rail installation and integration into industrial control cabinets where compact, dependable circuit protection is required.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial circuit protection.
- 6 A rated current for low-current three-phase circuits and control equipment.
- K tripping characteristic suitable for loads with elevated starting or inrush currents.
- Breaking capacity of up to 15 kA under applicable IEC conditions.
- UL 1077 supplementary protector for equipment-level overcurrent protection.
- DIN-rail mounting supports efficient installation in electrical control panels.
Key Features
- ABB ST200M miniature circuit breaker series.
- Three-pole configuration.
- 6 A rated current.
- K characteristic tripping curve.
- 15 kA maximum breaking capacity under applicable IEC conditions.
- Designed as a UL 1077 supplementary protector.
- Thermal-magnetic overcurrent protection principle.
- Compact modular construction for DIN-rail-mounted distribution and control equipment.
Reliable Protection for Industrial Electrical Circuits
Miniature circuit breakers such as the ABB ST203M-K6 provide automatic protection against overload and short-circuit conditions. Thermal-magnetic operation allows the breaker to respond appropriately to sustained overload currents and high fault currents, helping protect downstream conductors and equipment from electrical damage.
The K characteristic is particularly useful where normal equipment operation can produce higher transient starting currents. Combined with the three-pole configuration, the ST203M-K6 provides practical supplementary protection for three-phase industrial loads, machinery and control equipment while minimising unnecessary tripping during normal start-up conditions.
Typical Applications
- Industrial electrical control panels.
- Three-phase machinery and automation equipment.
- Motor and inductive-load control circuits.
- Machine-building and OEM electrical systems.
- Industrial power distribution equipment.
- Supplementary overcurrent protection within electrical equipment.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS273334R0377 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 3 | |
| Rated current | 6 A | |
| Tripping characteristic | K | |
| Breaking capacity | Up to 15 kA under applicable IEC conditions | |
| Standard / approval | UL 1077 supplementary protector | |
| Mounting type | DIN rail | |
| Weight | 0.345 kg | |
| Packing unit | 1 piece |
Frequently Asked Questions
What is the ABB ST203M-K6 used for?
The ST203M-K6 is a three-pole miniature circuit breaker designed to provide supplementary overcurrent and short-circuit protection in industrial machinery, control panels and electrical equipment.
What is the current rating of the ST203M-K6?
The ABB ST203M-K6 has a rated current of 6 A.
What does the K characteristic mean?
The K tripping characteristic is intended for circuits where loads can produce comparatively high starting or inrush currents, making it useful for industrial and inductive-load applications.
How many poles does the ABB ST203M-K6 have?
The ST203M-K6 is a three-pole breaker, allowing three conductors of a three-phase circuit to be protected together.
Is the ABB ST203M-K6 a UL 1077 supplementary protector?
Yes. The ST203M-K6 is designed as a UL 1077 supplementary protector for equipment-level overcurrent protection.
Trusted Industrial Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial control panels, machinery and automation equipment where reliable overcurrent protection and straightforward DIN-rail installation are required.
