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.
2CCS572001R1208 ABB S402M-UCZ20 MCB AC/DC 2P Type Z 20A
ABB S402M-UCZ20 is a 20 A Type Z 2-pole AC/DC miniature circuit breaker with 25 kA ultimate short-circuit breaking capacity, designed for reliable overload and short-circuit protection in SMISSLINE TP plug-in systems.
£124.50
Why Choose the ABB S402M-UCZ20 AC/DC Miniature Circuit Breaker?
The ABB S402M-UCZ20 is a 2-pole miniature circuit breaker (MCB) designed for dependable overload and short-circuit protection in AC and DC electrical systems. Part of the ABB S400M-UC range for the SMISSLINE TP plug-in system, it combines a 20 A rated current, Type Z tripping characteristic and high short-circuit performance for demanding electrical distribution applications.
The S402M-UCZ20 uses thermal and electromagnetic tripping principles to protect cables and connected circuits against sustained overloads and short-circuit faults. Its Type Z characteristic provides sensitive magnetic protection, making it suitable for appropriately designed circuits and equipment where a lower instantaneous tripping threshold is required.
Designed for flexible AC and DC operation, the S402M-UCZ20 supports two-pole applications up to 440 V DC when connected in accordance with ABB's specified DC arrangement. Its 25 kA rated ultimate short-circuit breaking capacity, compact 36 × 91 × 75 mm construction and SMISSLINE TP plug-in design make it a robust solution for commercial, industrial and critical-power installations.
Key Advantages
- 20 A rated current for protection of appropriately rated AC and DC circuits.
- 2-pole configuration for coordinated circuit protection.
- Type Z tripping characteristic for sensitive overcurrent protection.
- 25 kA ultimate short-circuit breaking capacity for robust fault protection.
- Supports two-pole applications up to 440 V DC with ABB's specified connection arrangement.
- Purpose-designed for the ABB SMISSLINE TP plug-in system.
Key Features
- ABB S400M-UC series miniature circuit breaker.
- 20 A nominal current rating.
- Type Z / UCZ tripping characteristic.
- 2-pole configuration.
- Suitable for AC and DC applications.
- Two-pole DC operation up to 440 V DC.
- 25 kA Icu ultimate short-circuit breaking capacity.
- IP20 degree of protection.
- SMISSLINE TP plug-in mounting for compatible distribution systems.
- Complies with IEC/EN 60947-2.
Reliable Type Z Protection for AC and DC Circuits
The ABB S402M-UCZ20 protects appropriately designed electrical 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.
The S400M-UC platform extends ABB's SMISSLINE TP system with flexible AC/DC circuit protection. With its 20 A Type Z characteristic and 25 kA Icu performance, the S402M-UCZ20 is particularly useful for sensitive control, auxiliary and distribution circuits where reliable plug-in protection and high short-circuit capability are required.
Typical Applications
- ABB SMISSLINE TP electrical distribution systems.
- Industrial AC and DC control circuits.
- Automation and machine-control systems.
- DC auxiliary power distribution.
- Sensitive equipment circuits requiring Type Z protection.
- Commercial, industrial and critical-power installations.
Technical Specifications
| Series | S400M-UC / SMISSLINE TP |
|---|---|
| ABB order code | 2CCS572001R1208 |
| EAN | 7612270110360 |
| Product type | AC/DC miniature circuit breaker (MCB) |
| Number of poles | 2 |
| Rated current | 20 A |
| Tripping characteristic | Type Z / UCZ |
| Maximum two-pole DC voltage | 440 V DC |
| Ultimate short-circuit breaking capacity (Icu) | 25 kA |
| Protection rating | IP20 |
| Mounting type | SMISSLINE TP plug-in |
| Width | 36 mm |
| Height | 91 mm |
| Depth | 75 mm |
| Net weight | approx. 221 g |
| Operating ambient temperature | −25 to +55 °C |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB S402M-UCZ20 used for?
The ABB S402M-UCZ20 is a 2-pole miniature circuit breaker designed to provide overload and short-circuit protection for appropriately rated AC and DC circuits within compatible ABB SMISSLINE TP systems.
What is the current rating of the S402M-UCZ20?
The S402M-UCZ20 has a rated current of 20 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.
Can the ABB S402M-UCZ20 be used on DC circuits?
Yes. The S402M-UCZ20 belongs to ABB's S400M-UC range and supports two-pole applications up to 440 V DC when connected according to ABB's specified DC connection arrangement.
What is the breaking capacity of the S402M-UCZ20?
The S402M-UCZ20 has a rated ultimate short-circuit breaking capacity of 25 kA.
Trusted ABB AC/DC Circuit Protection
ABB S400M-UC protective devices combine flexible AC/DC operation, high short-circuit performance and SMISSLINE TP plug-in technology for dependable commercial, industrial and critical-power electrical distribution.
