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2CDS272527R0558 ABB SU202DC-Z40 40A 2-Pole Type Z DC Miniature Circuit Breaker 14kA
ABB SU202DC-Z40 is a 40 A 2-pole Type Z DC miniature circuit breaker with a 14 kA UL 489 short-circuit rating for sensitive commercial and industrial DC circuit protection.
£167.35
Why Choose the ABB SU202DC-Z40 Miniature Circuit Breaker?
The ABB SU202DC-Z40 is a high-performance 2-pole DC miniature circuit breaker (MCB) designed to protect electrical circuits against overload and short-circuit conditions. Part of the ABB SU200DC series, this model combines a 40 A rated current, sensitive Type Z tripping characteristic and a high 14 kA short-circuit interrupting rating for demanding commercial and industrial DC applications.
Designed specifically for direct-current circuits, the SU202DC-Z40 provides reliable overcurrent protection for electronic equipment, control systems and other loads where rapid magnetic tripping is required. Its Z characteristic is particularly suitable for protecting sensitive circuits with relatively low short-circuit current requirements compared with conventional B, C or D characteristic breakers.
With two protected poles and suitability for DC systems up to 250 V DC, the SU202DC-Z40 provides compact protection within DIN-rail distribution and control assemblies. The breaker is manufactured in accordance with UL 489 and CSA 22.2 No. 5 requirements for commercial and industrial applications.
Key Advantages
- High-performance DC miniature circuit breaker for commercial and industrial circuits.
- 40 A rated current for higher-current DC loads.
- 2-pole configuration provides simultaneous circuit protection and isolation.
- Sensitive Type Z tripping characteristic for electronic and control circuits.
- 14 kA short-circuit interrupting rating according to UL 489.
- Suitable for DC applications up to 250 V DC.
- Compact modular format for straightforward DIN-rail installation.
Key Features
- ABB SU200DC miniature circuit breaker series.
- 40 A rated current.
- 2 protected poles.
- Z tripping characteristic.
- 14 kA SCCR according to UL 489.
- Designed specifically for direct-current circuits.
- Rated insulation voltage of 250 V.
- 3 kV rated impulse withstand voltage.
- Modular width of 2 DIN modules.
- Compatible with auxiliary devices from ABB's modular protection system.
Reliable Protection for Sensitive DC Circuits
Miniature circuit breakers protect wiring and connected equipment by automatically interrupting current when an overload or short circuit occurs. The ABB SU202DC-Z40 is engineered specifically for DC circuits, where correct interruption of direct current requires dedicated switching and arc-control characteristics.
The Type Z characteristic provides particularly responsive magnetic protection, making this breaker well suited to electronic equipment and control circuits requiring sensitive short-circuit protection. Its 14 kA UL 489 short-circuit rating and two-pole construction make it suitable for robust industrial DC distribution while maintaining a compact modular footprint.
Typical Applications
- Industrial DC power distribution systems.
- Electronic equipment and sensitive electrical circuits.
- Industrial control and automation panels.
- DC control-power circuits.
- Machine and equipment protection systems.
- Commercial and industrial electrical installations.
- Traction and transportation electrical systems.
Technical Specifications
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| Certification | UL 489 | |
|---|---|---|
| Series | SU200DC | |
| ABB order code | 2CDS272527R0558 | |
| Product type | DC miniature circuit breaker (MCB) | |
| Rated current | 40 A | |
| Number of poles | 2 | |
| Protected poles | 2 | |
| Tripping characteristic | Type Z | |
| Short-circuit current rating | 14 kA according to UL 489 | |
| DC system voltage | Up to 250 V DC | |
| Rated insulation voltage (Ui) | 250 V | |
| Rated impulse withstand voltage (Uimp) | 3 kV | |
| Standards | UL 489, CSA 22.2 No. 5 | |
| Energy limiting class | 3 | |
| Overvoltage category | III | |
| Pollution degree | 3 | |
| Power loss | 7.6 W | |
| Installation depth | 69 mm | |
| Width | 2 modular spacing units | |
| Operating ambient temperature | -20 to +55 °C | |
| Solid conductor capacity | 0.75–35 mm² | |
| Stranded conductor capacity | 0.75–25 mm² |
Frequently Asked Questions
What is the ABB SU202DC-Z40 used for?
The SU202DC-Z40 is a 2-pole DC miniature circuit breaker used to protect electrical circuits and connected equipment against overload and short-circuit conditions.
What is the rated current of the SU202DC-Z40?
The ABB SU202DC-Z40 has a rated current of 40 A.
What does the Z characteristic mean?
The Type Z tripping characteristic provides sensitive magnetic short-circuit protection and is particularly suited to electronic, control and other circuits where rapid operation at relatively low fault-current multiples is desirable.
What is the short-circuit rating of the SU202DC-Z40?
The SU202DC-Z40 has a 14 kA short-circuit current rating according to UL 489.
What is the ABB order code for the SU202DC-Z40?
The ABB order code for this miniature circuit breaker is 2CDS272527R0558.
Trusted ABB Circuit Protection
ABB SU200DC miniature circuit breakers provide dependable overload and short-circuit protection for DC electrical systems, combining dedicated DC performance with compact modular construction for commercial and industrial installations.
