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2CCS572001R1408 ABB S402M-UCZ40 MCB DC 2P Type Z 40A
ABB S402M-UCZ40 is a 40 A Type Z 2-pole DC miniature circuit breaker with 25 kA ultimate short-circuit breaking capacity at 440 V DC, designed for reliable overload and short-circuit protection in SMISSLINE TP plug-in systems.
£147.83
Why Choose the ABB S402M-UCZ40 DC Miniature Circuit Breaker?
The ABB S402M-UCZ40 is a 2-pole miniature circuit breaker (MCB) designed for reliable overload and short-circuit protection in demanding DC electrical systems. Part of the ABB S400M-UC range for the SMISSLINE TP plug-in system, it combines a 40 A rated current, Type Z tripping characteristic and high short-circuit performance.
The S402M-UCZ40 uses thermal and electromagnetic tripping to protect connected circuits against sustained overloads and short-circuit faults. Its Type Z characteristic provides sensitive magnetic protection, making it suitable for appropriately designed circuits where a lower instantaneous tripping threshold is required.
Designed for ABB's pluggable SMISSLINE TP distribution platform, the S402M-UCZ40 supports operation up to 440 V DC and provides an ultimate short-circuit breaking capacity of 25 kA at 440 V DC. Its compact 36 × 91 × 75 mm construction and IP20 protection make it a robust choice for industrial DC distribution and control applications.
Key Advantages
- 40 A rated current for protection of appropriately rated DC circuits.
- 2-pole configuration for coordinated circuit protection.
- Type Z tripping characteristic for sensitive overcurrent protection.
- 25 kA Icu at 440 V DC for high short-circuit performance.
- Rated for applications up to 440 V DC.
- Purpose-designed for the ABB SMISSLINE TP plug-in system.
Key Features
- ABB S400M-UC series miniature circuit breaker.
- 40 A nominal current rating.
- Type Z tripping characteristic.
- 2-pole configuration.
- Designed for DC circuit protection.
- Rated for up to 440 V DC.
- 25 kA ultimate short-circuit breaking capacity at 440 V DC.
- IP20 degree of protection.
- SMISSLINE plug-in mounting for compatible distribution systems.
- Compact 36 × 91 × 75 mm construction.
Reliable Type Z Protection for DC Circuits
The ABB S402M-UCZ40 protects appropriately designed DC circuits against excessive current resulting from overloads and short circuits. Its thermal release responds to sustained overload conditions, while the electromagnetic release provides rapid interruption when fault current reaches the instantaneous tripping range.
With its 40 A Type Z configuration and 25 kA Icu at 440 V DC, the S402M-UCZ40 combines sensitive overcurrent protection with substantial DC fault-breaking capability. Its SMISSLINE plug-in design also supports efficient integration into compatible ABB modular distribution assemblies.
Typical Applications
- ABB SMISSLINE TP DC distribution systems.
- Industrial DC control and distribution circuits.
- Automation and machine-control systems.
- DC auxiliary power distribution.
- Sensitive equipment circuits requiring Type Z protection.
- Commercial and industrial DC switchboards.
Technical Specifications
| Series | S400M-UC / SMISSLINE TP |
|---|---|
| ABB order code | 2CCS572001R1408 |
| EAN | 7612270110391 |
| Product type | DC miniature circuit breaker (MCB) |
| Number of poles | 2 |
| Rated current | 40 A |
| Tripping characteristic | Type Z |
| Rated DC voltage | up to 440 V DC |
| Ultimate short-circuit breaking capacity (Icu) at 440 V DC | 25 kA |
| Protection rating | IP20 |
| Electrical endurance | 10,000 cycles |
| Conductor connection range | 0.75–35 mm² |
| Mounting type | SMISSLINE plug-in |
| Width | 36 mm |
| Height | 91 mm |
| Depth | 75 mm |
| Net weight | approx. 221 g |
| Operating temperature | −25 to +55 °C |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB S402M-UCZ40 used for?
The ABB S402M-UCZ40 is a 2-pole miniature circuit breaker designed to provide overload and short-circuit protection for appropriately rated DC circuits within compatible ABB SMISSLINE TP systems.
What is the current rating of the S402M-UCZ40?
The S402M-UCZ40 has a rated current of 40 A.
What does the Type Z characteristic mean?
The Type Z tripping characteristic provides sensitive magnetic overcurrent protection and is suitable for appropriately designed circuits where a lower instantaneous tripping threshold is required.
What DC voltage can the ABB S402M-UCZ40 handle?
The S402M-UCZ40 is rated for applications up to 440 V DC, subject to installation in accordance with ABB's specified DC connection requirements.
What is the DC breaking capacity of the S402M-UCZ40?
The S402M-UCZ40 has an ultimate short-circuit breaking capacity of 25 kA at 440 V DC.
Trusted ABB DC Circuit Protection
ABB S400M-UC protective devices combine dedicated DC circuit protection, high short-circuit performance and SMISSLINE TP plug-in technology for dependable industrial and commercial electrical distribution.
