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2CCS572001R1404 ABB S402M-UCC40 40 A 2-Pole Type C DC Miniature Circuit Breaker
ABB S402M-UCC40 is a 40 A 2-pole UC-C Type C miniature circuit breaker for the SMISSLINE TP plug-in system, providing reliable overload and short-circuit protection for DC circuits up to 440 V.
£124.38
Why Choose the ABB S402M-UCC40 DC Miniature Circuit Breaker?
The ABB S402M-UCC40 is a high-performance 2-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in direct-current and alternating-current electrical systems. As part of the ABB S400M-UC / SMISSLINE TP plug-in system, it combines versatile circuit protection with convenient plug-in installation for compatible commercial and industrial distribution assemblies.
This circuit breaker has a rated current of 40 A and a UC-C / Type C tripping characteristic, making it suitable for circuits where moderate transient or inrush currents can occur during normal operation. Its two-pole construction supports coordinated protection and enables operation in higher-voltage DC circuits when connected according to ABB's specified arrangement.
The S402M-UCC40 supports two-pole operation up to 440 V DC and provides a short-circuit breaking capacity of 10 kA at 440 V DC. Its compact 36 × 91 × 75 mm construction, IP20 protection and SMISSLINE TP plug-in mounting make it a practical protection solution for professional DC power, automation and control systems.
Key Advantages
- Versatile 2-pole miniature circuit breaker for DC and AC applications.
- 40 A rated current for control, auxiliary and power-distribution circuits.
- UC-C / Type C tripping characteristic accommodates moderate transient and inrush currents.
- Supports two-pole operation up to 440 V DC.
- 10 kA short-circuit breaking capacity at 440 V DC.
- Designed for the ABB SMISSLINE TP plug-in system.
- Two-pole construction provides coordinated overcurrent protection.
- Compact 2-module design helps optimise distribution-board space.
Key Features
- ABB S400M-UC / SMISSLINE TP series.
- 40 A rated current.
- 2-pole configuration.
- UC-C / Type C tripping characteristic.
- 440 V DC maximum two-pole operating voltage.
- 10 kA short-circuit breaking capacity at 440 V DC.
- 10 kA breaking capacity at 230/400 V AC.
- IP20 degree of protection.
- Plug-in SMISSLINE TP mounting for modular distribution systems.
- Connection capacity from 0.75–35 mm².
- Electrical endurance of up to 10,000 operating cycles.
- Compliant with IEC/EN 60947-2.
Reliable Protection for DC Electrical Systems
DC miniature circuit breakers such as the ABB S402M-UCC40 automatically disconnect a circuit when excessive current occurs because of an overload or short circuit. Dedicated DC switching capability is important because direct-current arcs do not naturally pass through the regular zero-current points found in AC waveforms, requiring appropriately designed protective devices and connection arrangements for dependable fault interruption.
For higher-voltage DC applications, the two poles of the S402M-UCC40 can be connected according to ABB's specified arrangement to support operation up to 440 V DC. Combined with the SMISSLINE TP plug-in platform, the breaker provides effective circuit protection while supporting efficient installation, replacement and maintenance in compatible modular distribution systems.
Typical Applications
- Industrial DC distribution systems.
- DC control and auxiliary circuits.
- Machine control panels and automation systems.
- Battery-backed power and distribution circuits.
- DC power-supply output circuits.
- Industrial instrumentation and monitoring equipment.
- Commercial and industrial AC/DC distribution.
- OEM machinery incorporating DC electrical systems.
- ABB SMISSLINE TP modular distribution assemblies.
Technical Specifications
| Product group | SMISSLINE Plug-in System |
|---|---|
| Range | SMISSLINE TP |
| Series | S400M-UC |
| ABB order code | 2CCS572001R1404 |
| Product type | Miniature circuit breaker (MCB) for AC/DC applications |
| Rated current | 40 A |
| Number of poles | 2 |
| Tripping characteristic | UC-C / Type C |
| Maximum two-pole DC operating voltage | 440 V DC |
| Short-circuit breaking capacity at 440 V DC | 10 kA |
| AC breaking capacity | 10 kA at 230/400 V AC |
| Protection rating | IP20 |
| Mounting type | Plug-in SMISSLINE TP |
| Module width | 2 modules |
| Connection conductor cross-section | 0.75–35 mm² |
| Electrical endurance | 10,000 cycles |
| Operating ambient temperature | -25 to +60 °C |
| Width | 36 mm |
| Height | 91 mm |
| Depth | 75 mm |
| Dimensions (W × H × D) | 36 × 91 × 75 mm |
| Weight | approx. 0.221 kg |
| Pack quantity | 5 pieces |
| EAN | 7612270110056 |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB S402M-UCC40 used for?
The ABB S402M-UCC40 is a 2-pole miniature circuit breaker designed to protect DC and AC electrical circuits against overload and short-circuit currents in commercial and industrial control, automation and distribution applications.
What is the current rating of the S402M-UCC40?
The S402M-UCC40 has a rated current of 40 A.
What does the UC-C / Type C characteristic mean?
The UC-C / Type C tripping characteristic provides overload and short-circuit protection while accommodating moderate short-duration transient or inrush currents that can occur during normal operation of suitable electrical loads.
What DC voltage can the ABB S402M-UCC40 handle?
The two-pole S402M-UCC40 supports operation up to 440 V DC when its poles are connected in accordance with ABB's specified two-pole DC connection arrangement.
What is the breaking capacity of the ABB S402M-UCC40?
The S402M-UCC40 provides a short-circuit breaking capacity of 10 kA at 440 V DC and 10 kA at 230/400 V AC.
Trusted ABB DC Circuit Protection
ABB S400M-UC miniature circuit breakers provide dependable protection for DC and AC electrical systems, combining effective overcurrent protection with the installation flexibility and modular convenience of the SMISSLINE TP plug-in distribution platform.
