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2CDS273334R0457 ABB ST203M-K15 Miniature Circuit Breaker 15 A 3P K UL1077
ABB ST203M-K15 is a 15 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.
£78.08
Why Choose the ABB ST203M-K15 Miniature Circuit Breaker?
The ABB ST203M-K15 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide reliable supplementary overcurrent and short-circuit protection in industrial electrical control and distribution equipment. As part of the ABB ST200M miniature circuit breaker series, it combines compact modular construction with a K tripping characteristic suited to circuits containing loads with elevated starting currents.
This breaker has a 15 A rated current and a K tripping characteristic, making it particularly suitable for industrial equipment and inductive loads where normal starting currents can be higher than the continuous operating current. Its three-pole configuration enables coordinated protection across three conductors in machinery, automation systems and three-phase control applications.
The ST203M-K15 is a UL 1077 supplementary protector with a 10 kA UL 1077 interrupting rating at its applicable listed voltages. The ST200M series also achieves up to 15 kA short-circuit breaking capacity under applicable IEC conditions, providing robust circuit protection in a compact DIN-rail-mounted format.
Key Advantages
- Compact three-pole miniature circuit breaker for industrial equipment protection.
- 15 A rated current for three-phase and industrial control circuits.
- K tripping characteristic suited to loads with elevated starting and inrush currents.
- 10 kA UL 1077 interrupting rating at applicable listed voltages.
- Up to 15 kA breaking capacity 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.
- 15 A rated current.
- K characteristic tripping curve.
- 10 kA interrupting rating according to UL 1077 at 240 V AC, 480Y/277 V AC and 125 V DC.
- Up to 15 kA short-circuit breaking capacity under applicable IEC conditions.
- Designed as a UL 1077 supplementary protector.
- Compact modular construction for DIN-rail-mounted control and distribution equipment.
Reliable Protection for Industrial Electrical Circuits
Miniature circuit breakers such as the ABB ST203M-K15 provide automatic protection against overload and short-circuit conditions. Their protective operation helps isolate abnormal current conditions before they can cause excessive heating or damage to downstream wiring and electrical equipment.
The K characteristic is particularly useful for circuits where equipment can draw elevated current during normal start-up. Combined with its three-pole configuration and 15 A rating, the ST203M-K15 provides practical supplementary protection for industrial machinery, control systems and other equipment containing inductive loads.
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 | 2CDS273334R0457 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 3 | |
| Rated current | 15 A | |
| Tripping characteristic | K | |
| UL 1077 interrupting rating | 10 kA | |
| Rated voltage | 240 V AC / 125 V DC | |
| UL 1077 system rating | 480Y/277 V AC | |
| IEC short-circuit breaking capacity | Up to 15 kA under applicable 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-K15 used for?
The ST203M-K15 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-K15?
The ABB ST203M-K15 has a rated current of 15 A.
What does the K characteristic mean?
The K tripping characteristic is suited to circuits containing loads with elevated starting or inrush currents, making it useful for industrial machinery and inductive-load applications.
What is the interrupting rating of the ABB ST203M-K15?
The ST203M-K15 has a 10 kA UL 1077 interrupting rating at its applicable listed voltages and achieves up to 15 kA short-circuit breaking capacity under applicable IEC conditions.
Is the ABB ST203M-K15 a UL 1077 supplementary protector?
Yes. The ST203M-K15 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.
