Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
2CDS273337R0157 ABB SU203M-K0.5 Miniature Circuit Breaker 0.5 A 3P K Curve 10 kA UL489
ABB SU203M-K0.5 is a 0.5 A three-pole K-curve SU200M miniature circuit breaker with a 10 kA UL 489 interrupting rating for industrial branch circuit protection applications.
£167.64
Why Choose the ABB SU203M-K0.5 Miniature Circuit Breaker?
The ABB SU203M-K0.5 is a high-performance three-pole miniature circuit breaker (MCB) designed for branch circuit protection in industrial machinery, automation systems and electrical distribution equipment. As part of the ABB System pro M compact SU200M series, it combines a 0.5 A rated current with K-curve tripping characteristics and UL 489 branch circuit protection.
Designed for demanding industrial applications, the SU203M-K0.5 provides thermal-magnetic protection against overloads and short circuits. Its K tripping characteristic is particularly suitable for circuits with higher starting or inrush currents, including inductive loads, transformers and control equipment, helping provide dependable protection while reducing unwanted tripping during normal start-up conditions.
With a rated current of 0.5 A, a three-pole configuration and 10 kA UL 489 interrupting rating, the SU203M-K0.5 provides robust branch circuit protection for low-current industrial circuits. The SU200M platform is designed for branch circuit protection up to 480Y/277 V AC and 96 V DC, while the SU203M-K0.5 also provides a rated ultimate short-circuit breaking capacity of 15 kA at 400 V AC according to IEC/EN 60947-2.
Key Advantages
- High-performance three-pole miniature circuit breaker for branch circuit protection.
- 0.5 A rated current for sensitive low-current industrial circuits and equipment.
- K-curve tripping characteristic suitable for circuits with higher starting and inrush currents.
- 10 kA UL 489 interrupting rating for robust branch circuit protection.
- 15 kA ultimate short-circuit breaking capacity at 400 V AC according to IEC/EN 60947-2.
- UL 489 branch circuit protection for systems up to 480Y/277 V AC and 96 V DC.
Key Features
- ABB System pro M compact SU200M series.
- 0.5 A rated current.
- Three-pole (3P) configuration.
- K tripping characteristic.
- 10 kA UL 489 interrupting rating.
- 15 kA rated ultimate short-circuit breaking capacity at 400 V AC.
- Thermal-magnetic overload and short-circuit protection.
- Branch circuit protection according to UL 489.
- Maximum UL/CSA operating voltage of 480Y/277 V AC.
- SU200M branch circuit protection capability up to 96 V DC.
- Red ON / green OFF contact position indication.
- Compact modular design for DIN rail installations.
Reliable Branch Circuit Protection for Industrial Equipment
Miniature circuit breakers such as the ABB SU203M-K0.5 automatically disconnect protected circuits when overload or short-circuit conditions occur. Its thermal-magnetic operating principle combines thermal overload protection with rapid magnetic fault-current protection, helping safeguard conductors, machinery and electrical equipment against damaging overcurrents.
The SU200M series is engineered for industrial and OEM applications requiring UL 489 branch circuit protection. Its combination of UL, CSA and IEC compliance supports use in machinery and electrical equipment intended for international markets, while the compact System pro M format simplifies integration into modern control and distribution panels.
Typical Applications
- Industrial control panels and electrical enclosures.
- Machinery and OEM electrical systems.
- Low-current three-phase circuits.
- Automation and manufacturing equipment.
- Inductive loads and circuits with higher starting currents.
- Control transformers, coils and industrial control equipment.
- UL 489 branch circuit protection applications.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 489 | |
|---|---|---|
| Series | SU200M / System pro M compact | |
| ABB order code | 2CDS273337R0157 | |
| Product type | Miniature circuit breaker / branch circuit breaker | |
| Product group | UL489 / UL1077 MCB | |
| Rated current | 0.5 A | |
| Number of poles | 3 | |
| Number of protected poles | 3 | |
| Tripping characteristic | K | |
| Protection type | Thermal-magnetic overload and short-circuit protection | |
| UL 489 interrupting rating | 10 kA | |
| Rated ultimate short-circuit breaking capacity (Icu) | 15 kA at 400 V AC | |
| Rated service short-circuit breaking capacity (Ics) | 11.2 kA at 400 V AC | |
| Rated operational voltage | 400 V AC according to IEC 60947-2 | |
| Maximum UL/CSA operating voltage | 480Y/277 V AC | |
| SU200M DC capability | Up to 96 V DC | |
| Rated frequency | 50 / 60 Hz and DC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Dielectric test voltage | 2 kV at 50 / 60 Hz for 1 minute | |
| Standards | UL 489, CSA 22.2 No. 5, IEC/EN 60947-2 | |
| Protection rating | IP20; IP40 when installed in an enclosure with cover | |
| Pollution degree | 3 | |
| Contact position indication | Red ON / Green OFF | |
| Tightening torque | 2.8 N·m | |
| Power loss | 4.2 W total; 1.4 W per pole at rated operating conditions | |
| Electrical endurance | 20,000 cycles | |
| Mechanical endurance | 20,000 cycles | |
| Operating ambient temperature | -25 to +55 °C | |
| Mounting type | DIN rail mounting | |
| Terminal type | Double terminal | |
| Dimensions (H × W × D) | 111 × 52.5 × 69 mm | |
| Weight | 0.375 kg | |
| EAN | 4016779930246 |
Frequently Asked Questions
What is the ABB SU203M-K0.5 used for?
The ABB SU203M-K0.5 is a three-pole miniature circuit breaker designed to provide UL 489 branch circuit protection against overloads and short circuits in industrial machinery, automation equipment and electrical control systems.
What is the current rating of the SU203M-K0.5?
The SU203M-K0.5 has a rated current of 0.5 A and uses a K tripping characteristic.
What is the breaking capacity of the ABB SU203M-K0.5?
The SU203M-K0.5 has a 10 kA UL 489 interrupting rating and a rated ultimate short-circuit breaking capacity of 15 kA at 400 V AC according to IEC/EN 60947-2.
What does the K tripping characteristic mean?
A K-curve MCB is designed for circuits where higher starting or inrush currents can occur, making it well suited to many inductive industrial loads while still providing dependable overload and short-circuit protection.
What voltage can the ABB SU203M-K0.5 be used at?
The SU200M platform is designed for UL 489 branch circuit protection up to 480Y/277 V AC and 96 V DC, while the SU203M-K0.5 has a rated operational voltage of 400 V AC according to IEC 60947-2.
Trusted Industrial Circuit Protection from ABB
ABB System pro M compact SU200M miniature circuit breakers provide dependable UL 489 branch circuit protection for industrial machinery, automation systems and electrical distribution equipment, combining high short-circuit performance with a compact modular design and international standards compliance.
