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2CDS272334R0021 ABB ST202M-D2 Miniature Circuit Breaker 2P D 2A UL 1077
ABB ST202M-D2 is a 2 A two-pole D-characteristic miniature circuit breaker with 15 kA IEC short-circuit breaking capacity and UL 1077 supplementary protection for industrial control and high-inrush electrical loads.
£61.65
Why Choose the ABB ST202M-D2 Miniature Circuit Breaker?
The ABB ST202M-D2 is a high-performance two-pole miniature circuit breaker (MCB) designed to provide supplementary overcurrent and short-circuit protection in industrial, commercial and machine-building electrical systems. As part of the ABB System pro M compact ST200M series, it combines a D tripping characteristic with a 2 A rated current for dependable protection of circuits supplying equipment with high starting and inrush currents.
Designed for applications requiring UL 1077 supplementary protection, the ST202M-D2 provides simultaneous two-pole circuit protection in a compact DIN rail format. Its D tripping characteristic makes it particularly suitable for circuits supplying highly inductive equipment and other loads that can produce substantial transient currents during start-up.
With a rated current of 2 A, a two-pole configuration and an ultimate short-circuit breaking capacity of 15 kA at 400 V AC and 125 V DC according to IEC/EN 60947-2, the ST202M-D2 provides robust protection for industrial control and distribution applications. Its UL 1077 interrupting rating is 10 kA at 480Y/277 V AC and 125 V DC, supporting use in demanding supplementary protection applications.
Key Advantages
- Compact two-pole miniature circuit breaker for supplementary circuit protection.
- 2 A rated current suitable for low-current industrial and control circuits.
- D tripping characteristic suitable for equipment with high starting and inrush currents.
- 15 kA ultimate short-circuit breaking capacity at 400 V AC and 125 V DC according to IEC/EN 60947-2.
- 10 kA UL 1077 interrupting rating at specified UL voltages.
- Double-clamp terminals and DIN rail mounting simplify integration into industrial electrical panels.
Key Features
- ABB System pro M compact ST200M series.
- 2 A rated current.
- 2-pole configuration with two protected poles.
- D tripping characteristic.
- 15 kA ultimate short-circuit breaking capacity at 400 V AC and 125 V DC.
- 11.2 kA service short-circuit breaking capacity at 400 V AC.
- 400 V AC rated operational voltage according to IEC 60947-2.
- 440 V rated insulation voltage.
- 4 kV rated impulse withstand voltage.
- 50 / 60 Hz rated frequency.
- Double-clamp terminals for secure conductor connections.
- Compact two-module DIN rail format for control and distribution panels.
Reliable Supplementary Protection for High-Inrush Loads
Miniature circuit breakers such as the ABB ST202M-D2 automatically interrupt a circuit when excessive current caused by an overload or short circuit is detected. This helps protect conductors and connected electrical equipment while providing a convenient resettable protection device for industrial control, auxiliary and machine-building circuits.
The ST200M series is designed for demanding industrial applications where compact supplementary protection and recognised international standards are required. The D characteristic accommodates high transient starting currents without unnecessary operation, making the ST202M-D2 particularly suitable for circuits supplying transformers, inductive equipment and other loads with substantial inrush current.
Typical Applications
- Industrial machinery and electrical control panels.
- Automation and process-control equipment.
- Transformer and highly inductive load circuits.
- Control circuits with high equipment start-up currents.
- Commercial and industrial electrical systems.
- OEM machinery requiring UL 1077 supplementary protection.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Series | System pro M compact ST200M | |
| ABB order code | 2CDS272334R0021 | |
| EAN | 4016779021067 | |
| Product type | Miniature circuit breaker (MCB) | |
| Product group | UL 489 / UL 1077 MCB | |
| Number of poles | 2 | |
| Number of protected poles | 2 | |
| Rated current | 2 A | |
| Tripping characteristic | D | |
| Rated operational voltage | 400 V AC according to IEC 60947-2 | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Rated ultimate short-circuit breaking capacity | 15 kA at 400 V AC / 125 V DC | |
| Rated service short-circuit breaking capacity | 11.2 kA at 400 V AC | |
| UL 1077 interrupting rating | 10 kA at 480Y/277 V AC / 125 V DC | |
| Rated frequency | 50 / 60 Hz | |
| Input voltage type | AC | |
| Energy limiting class | 3 | |
| Overvoltage category | III | |
| Standards | UL 1077, CSA 22.2 No. 235, IEC/EN 60947-2 | |
| 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 (W × H × D) | 35 × 88 × 69 mm | |
| Built-in depth | 69 mm | |
| Weight | approx. 0.23 kg |
Frequently Asked Questions
What is the ABB ST202M-D2 used for?
The ST202M-D2 is a two-pole miniature circuit breaker designed for supplementary overcurrent and short-circuit protection in industrial control, machinery and other electrical circuits, particularly those supplying loads with high starting currents.
What is the current rating of the ST202M-D2?
The ABB ST202M-D2 has a rated current of 2 A.
What does the D characteristic mean?
The D tripping characteristic is designed to accommodate high starting and inrush currents, making it suitable for transformers, highly inductive equipment and other loads that can draw substantial transient current during start-up.
What is the short-circuit breaking capacity of the ABB ST202M-D2?
The ST202M-D2 has an ultimate short-circuit breaking capacity of 15 kA at 400 V AC and 125 V DC according to IEC/EN 60947-2 and a UL 1077 interrupting rating of 10 kA at 480Y/277 V AC and 125 V DC.
Which standards does the ST202M-D2 meet?
The ST202M-D2 is designed in accordance with major supplementary circuit protection standards including UL 1077, CSA 22.2 No. 235 and IEC/EN 60947-2.
Trusted ABB Circuit Protection
ABB System pro M compact miniature circuit breakers provide dependable supplementary circuit protection for industrial control, automation and machine-building applications, combining compact DIN rail installation with robust overload and short-circuit protection.
