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.
2CCS572001R1038 ABB S402M-UCZ3 DC Miniature Circuit Breaker 3 A 2P Type Z
ABB S402M-UCZ3 is a 3 A 2-pole Type Z DC miniature circuit breaker rated up to 440 V DC and designed for overload and short-circuit protection in SMISSLINE TP plug-in distribution systems.
£111.12
Why Choose the ABB S402M-UCZ3 DC Miniature Circuit Breaker?
The ABB S402M-UCZ3 is a specialised 2-pole DC miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in DC electrical distribution systems. As part of the ABB SMISSLINE TP S400M UC series, it combines a 3 A rated current, Type Z tripping characteristic and plug-in installation for compact industrial power distribution.
Designed for circuits requiring sensitive overcurrent protection, the S402M-UCZ3 uses a Type Z characteristic suited to applications where rapid magnetic tripping is required at relatively low multiples of rated current. Its two protected poles allow simultaneous protection of both conductors in appropriate DC circuits, while the SMISSLINE plug-in design simplifies integration into compatible distribution assemblies.
With a 3 A rated current, 2-pole configuration and rated operating voltage up to 440 V DC, the S402M-UCZ3 is suitable for control, automation and other sensitive DC circuits. The breaker provides a rated ultimate short-circuit breaking capacity of 25 kA at 440 V DC and has a compact 36 mm two-module width.
Key Advantages
- Specialised DC miniature circuit breaker for overload and short-circuit protection.
- 3 A rated current for low-current control and auxiliary circuits.
- 2-pole configuration with two protected poles.
- Type Z tripping characteristic for sensitive electrical loads.
- Rated for operation up to 440 V DC.
- 25 kA ultimate short-circuit breaking capacity at 440 V DC.
- Plug-in construction designed for the ABB SMISSLINE TP system.
Key Features
- ABB S400M UC / SMISSLINE TP series.
- 3 A rated current.
- 2 protected poles.
- Type Z / UC-Z tripping characteristic.
- 440 V DC rated operating voltage.
- 25 kA rated ultimate short-circuit breaking capacity at 440 V DC.
- 4 kV rated impulse withstand voltage.
- IP20 degree of protection.
- Compact two-module construction for compatible SMISSLINE TP distribution systems.
Reliable Protection for DC Circuits
DC miniature circuit breakers such as the ABB S402M-UCZ3 protect conductors and connected equipment by automatically interrupting current when overload or short-circuit conditions occur. Correctly rated DC switching capability is particularly important because direct current does not naturally pass through a zero-current point during each cycle as alternating current does.
The S400M UC range is engineered specifically for AC and DC applications within the SMISSLINE TP platform. The S402M-UCZ3 combines its sensitive Type Z characteristic with a two-pole configuration and high DC short-circuit capability, making it suitable for demanding control, automation and industrial DC distribution circuits.
Typical Applications
- Industrial DC distribution systems.
- Automation and machine control circuits.
- DC control and auxiliary power circuits.
- Sensitive electronic equipment protection.
- Industrial control and distribution cabinets.
- ABB SMISSLINE TP modular distribution assemblies.
Technical Specifications
| Series | S400M UC / SMISSLINE TP |
|---|---|
| ABB order code | 2CCS572001R1038 |
| Product type | DC miniature circuit breaker (MCB) |
| Rated current | 3 A |
| Number of poles | 2 |
| Number of protected poles | 2 |
| Tripping characteristic | Type Z / UC-Z |
| Rated operating voltage | 440 V DC |
| Rated ultimate short-circuit breaking capacity (Icu) | 25 kA at 440 V DC |
| Rated impulse withstand voltage | 4 kV |
| Protection rating | IP20 |
| Operating temperature | -25 to +55 °C |
| Mounting type | SMISSLINE TP plug-in system |
| Width | 36 mm |
| Height | 91 mm |
| Depth | 75 mm |
| Width in modules | 2 |
| Weight | approx. 221 g |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB S402M-UCZ3 used for?
The S402M-UCZ3 is a 2-pole DC miniature circuit breaker designed to protect compatible DC electrical circuits against overloads and short circuits.
What is the current rating of the S402M-UCZ3?
The ABB S402M-UCZ3 has a rated current of 3 A.
What tripping characteristic does the S402M-UCZ3 use?
The breaker uses a Type Z / UC-Z tripping characteristic, making it suitable for sensitive circuits requiring rapid response to overcurrent conditions.
What DC voltage is the ABB S402M-UCZ3 rated for?
The S402M-UCZ3 has a rated operating voltage of up to 440 V DC in its specified two-pole configuration.
How is the ABB S402M-UCZ3 installed?
The breaker is designed for plug-in installation within the ABB SMISSLINE TP system, allowing efficient integration into compatible modular electrical distribution assemblies.
Trusted ABB DC Circuit Protection
ABB S400M UC miniature circuit breakers provide dependable overload and short-circuit protection for AC and DC applications while combining specialised tripping characteristics with the modular advantages of the SMISSLINE TP plug-in distribution system.
