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2CDS272334R0577 ABB ST202M-K50 50 A 2-Pole K Characteristic Miniature Circuit Breaker
ABB ST202M-K50 is a 50 A 2-pole K-characteristic miniature circuit breaker from the ST200M series with a 15 kA ultimate short-circuit breaking capacity at 400 V AC and UL 1077 supplementary protection ratings.
£77.07
Why Choose the ABB ST202M-K50 Miniature Circuit Breaker?
The ABB ST202M-K50 is a high-performance 2-pole miniature circuit breaker (MCB) designed for supplementary overcurrent and short-circuit protection in industrial electrical and automation systems. As part of the robust ABB ST200M miniature circuit breaker series, it combines a 50 A rated current with a K tripping characteristic for reliable protection of circuits supplying equipment with higher starting currents.
Designed for demanding industrial applications, the ST202M-K50 provides thermal-magnetic protection against overload and short-circuit conditions in a compact DIN-rail format. Its K characteristic is particularly suited to circuits supplying motors, transformers and other inductive loads where normal starting or inrush currents could cause unwanted operation of more sensitive circuit breakers.
With a 50 A rated current, 2-pole configuration and 15 kA rated ultimate short-circuit breaking capacity at 400 V AC according to IEC 60947-2, the ST202M-K50 provides robust protection for industrial control and distribution applications. ABB order code 2CDS272334R0577 identifies this specific ST200M configuration, which is also designed for supplementary protection according to UL 1077.
Key Advantages
- Compact 2-pole miniature circuit breaker for industrial circuit protection.
- 50 A rated current for higher-current electrical and automation applications.
- K tripping characteristic suitable for circuits with elevated starting and inrush currents.
- 15 kA ultimate short-circuit breaking capacity at 400 V AC according to IEC 60947-2.
- UL 1077 supplementary protection ratings for North American applications.
- Compact modular construction designed for straightforward DIN-rail installation.
Key Features
- ABB ST200M miniature circuit breaker series.
- 50 A rated current.
- 2-pole configuration.
- K tripping characteristic.
- Rated operational voltage of 400 V AC according to IEC 60947-2.
- 440 V rated insulation voltage.
- 4 kV rated impulse withstand voltage.
- 50 / 60 Hz rated frequency.
- Energy limiting class 3.
- Double-clamp terminals for secure conductor connection.
- Compact DIN-rail format occupying two modular spacings.
Reliable Protection for Industrial Electrical Circuits
Miniature circuit breakers such as the ABB ST202M-K50 protect electrical circuits and connected equipment against damaging overload and short-circuit currents. Thermal-magnetic operation combines overload protection with rapid magnetic interruption during sufficiently high fault-current conditions, helping protect conductors and connected equipment.
The K characteristic is well suited to industrial circuits supplying loads that can produce substantial but normal starting currents, including motors and transformers. Combined with the ST200M series' compact modular construction, high short-circuit breaking capacity and DIN-rail mounting format, this makes the ST202M-K50 suitable for industrial control panels, machinery and supplementary circuit protection.
Typical Applications
- Industrial control panels and electrical cabinets.
- Motor and machinery circuits with higher starting currents.
- Transformer and inductive-load protection.
- Automation and machine control systems.
- Industrial power distribution equipment.
- OEM machinery and manufacturing equipment.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| Order code | 2CDS272334R0577 | |
| EAN | 4016779022842 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 A | |
| Number of poles | 2P | |
| Number of protected poles | 2 | |
| Tripping characteristic | K | |
| Rated operational voltage | 400 V AC according to IEC 60947-2 | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Rated frequency | 50 / 60 Hz | |
| Rated ultimate short-circuit breaking capacity | 15 kA at 400 V AC | |
| Rated service short-circuit breaking capacity | 7.5 kA at 400 V AC | |
| UL 1077 interrupting rating | 10 kA at 240 V AC | |
| Standards | IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 | |
| Energy limiting class | 3 | |
| Overvoltage category | III | |
| Power loss | 6.5 W total, 3.25 W per pole at rated operating conditions | |
| Terminal type | Double clamp | |
| Rigid conductor capacity | up to 35 mm² | |
| Flexible conductor capacity | up to 25 mm² | |
| Mounting type | DIN rail | |
| Modular width | 2 modules | |
| Dimensions (H × W × D) | 88 × 35 × 69 mm | |
| Weight | approx. 0.23 kg |
Frequently Asked Questions
What is the ABB ST202M-K50 used for?
The ABB ST202M-K50 is a 50 A 2-pole miniature circuit breaker used for overload and short-circuit protection in industrial electrical, automation and machinery applications.
What is the current rating of the ST202M-K50?
The ST202M-K50 has a rated current of 50 A and uses a 2-pole configuration.
What does the K characteristic mean on the ST202M-K50?
The K tripping characteristic is designed for circuits with comparatively high starting or inrush currents, making it suitable for applications such as motors, transformers and other inductive loads.
What is the short-circuit breaking capacity of the ST202M-K50?
The ST202M-K50 has a rated ultimate short-circuit breaking capacity of 15 kA at 400 V AC according to IEC 60947-2, with separate interrupting ratings applying under UL 1077.
What is the ABB order code for the ST202M-K50?
The ABB order code for the ST202M-K50 is 2CDS272334R0577.
Trusted Industrial Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide compact and dependable protection for industrial control, automation and electrical distribution applications, combining high short-circuit performance with a practical modular DIN-rail design.
