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2CDS271334R0501 ABB ST201M-D50 50A 1P D Curve 15kA Miniature Circuit Breaker
ABB ST201M-D50 is a 50 A single-pole D-curve 15 kA miniature circuit breaker and UL 1077 supplementary protector designed for reliable overload and short-circuit protection in industrial equipment and high-inrush applications.
£33.68
Why Choose the ABB ST201M-D50 Miniature Circuit Breaker?
The ABB ST201M-D50 is a high-performance single-pole miniature circuit breaker (MCB) / supplementary protector designed to provide reliable overload and short-circuit protection in industrial control, machinery and equipment circuits. With ABB order code 2CDS271334R0501, it forms part of the ABB ST 200 M series of modular DIN-rail circuit protection devices.
Designed for demanding applications requiring dependable protection in a compact format, the ST201M-D50 combines thermal and magnetic tripping to protect conductors and connected equipment against overcurrent conditions. Its D tripping characteristic is particularly suited to circuits with high starting or inrush currents, including selected motors, transformers and other inductive loads.
The ST201M-D50 has a rated current of 50 A, a single-pole configuration and a 15 kA short-circuit breaking capacity. Its UL 1077 classification supports use as a supplementary protector within electrical equipment, making it well suited to industrial machinery, automation systems and control-panel applications.
Key Advantages
- Compact single-pole miniature circuit breaker for supplementary circuit protection.
- 50 A rated current for higher-current industrial equipment circuits.
- D tripping characteristic suited to loads with high starting and inrush currents.
- 15 kA short-circuit breaking capacity for demanding circuit protection applications.
- UL 1077 supplementary protector classification.
- DIN-rail modular construction simplifies integration into industrial control panels, machinery and electrical assemblies.
Key Features
- ABB ST 200 M series miniature circuit breaker.
- 50 A rated current.
- Single-pole (1P) configuration.
- D-curve tripping characteristic.
- 15 kA short-circuit breaking capacity.
- UL 1077 supplementary protector.
- Thermal-magnetic protection against overload and short-circuit conditions.
- Compact modular design for DIN-rail installation.
High-Inrush Circuit Protection for Industrial Systems
Miniature circuit breakers such as the ABB ST201M-D50 provide automatic protection against overload and short-circuit conditions. The thermal element responds to sustained overloads, while the magnetic element provides rapid operation during sufficiently high fault currents, helping protect conductors and connected electrical equipment from damaging overcurrent conditions.
The ST201M-D50's 50 A rating and D tripping characteristic make it particularly useful for industrial circuits where substantial but normal current peaks can occur during equipment start-up. This makes it suitable for selected motors, transformers, solenoids and other inductive loads, provided the circuit design and protection requirements are compatible with the breaker's characteristics.
Typical Applications
- Industrial control panels and automation systems.
- Machinery and equipment circuits with high starting currents.
- Selected motor and transformer circuits.
- Inductive loads where a D-curve characteristic is appropriate.
- Supplementary protection within industrial electrical equipment.
- DIN-rail control and electrical distribution assemblies.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | ST 200 M | |
| SKU | ST201MD50 | |
| ABB order code | 2CDS271334R0501 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Product group | UL 489 / UL 1077 MCB | |
| Number of poles | 1P | |
| Rated current | 50 A | |
| Tripping characteristic | D | |
| Short-circuit breaking capacity | 15 kA | |
| Protection principle | Thermal-magnetic | |
| Standard | UL 1077 | |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB ST201M-D50 used for?
The ST201M-D50 is a single-pole miniature circuit breaker and UL 1077 supplementary protector designed to protect industrial equipment and electrical circuits against overload and short-circuit conditions, particularly where high starting or inrush currents may occur.
What is the rated current of the ST201M-D50?
The ABB ST201M-D50 has a rated current of 50 A.
What does the D tripping characteristic mean on the ST201M-D50?
The D tripping characteristic is suited to circuits that can experience high starting or inrush currents, making it appropriate for selected industrial inductive loads such as motors, transformers and similar equipment.
What is the short-circuit breaking capacity of the ST201M-D50?
The ABB ST201M-D50 has a 15 kA short-circuit breaking capacity, providing high-performance protection for demanding industrial circuit applications.
What is the ABB order code for the ST201M-D50?
The ABB order code for the ST201M-D50 is 2CDS271334R0501.
ABB Circuit Protection for Industrial Applications
ABB ST 200 M miniature circuit breakers provide compact thermal-magnetic overcurrent protection for industrial control equipment, machinery and electrical systems, combining dependable circuit protection with a modular DIN-rail format suited to demanding installations.
