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2CDH783010R0557 ABB S753DR-K40 Selective Main Circuit Breaker 3P 40A 25kA
ABB S753DR-K40 is a 3-pole 40 A K-selective main circuit breaker with 25 kA short-circuit breaking capacity for reliable protection and selective coordination in three-phase low-voltage electrical distribution systems.
£251.64
Why Choose the ABB S753DR-K40 Selective Main Circuit Breaker?
The ABB S753DR-K40 is a high-performance 3-pole selective main circuit breaker (SMCB) designed to provide reliable overload and short-circuit protection in low-voltage electrical distribution systems where selective coordination and continuity of supply are important. As part of the ABB S750 DR series, it provides dependable group and main circuit protection for demanding three-phase power distribution applications.
The S753DR-K40 features a K selective tripping characteristic and is designed to provide short-circuit selectivity with downstream miniature circuit breakers. This selective operation helps ensure that the protective device closest to a fault disconnects first, reducing unnecessary interruption to unaffected circuits and improving overall supply availability.
With a rated current of 40 A, a 3-pole configuration and a short-circuit breaking capacity of 25 kA, the S753DR-K40 provides robust protection for three-phase distribution circuits. Its modular DIN-rail design enables fast integration into distribution boards, meter panels and electrical installations requiring coordinated circuit protection.
Key Advantages
- Selective main circuit breaker for three-phase electrical distribution systems.
- 40 A rated current for distribution and feeder circuits.
- 3-pole configuration for three-phase circuit protection.
- 25 kA short-circuit breaking capacity for demanding fault conditions.
- K selective characteristic supports coordination with downstream protective devices.
- DIN-rail construction enables fast and straightforward installation.
Key Features
- ABB S750 DR selective main circuit breaker series.
- 40 A rated current.
- 3-pole construction.
- K selective tripping characteristic.
- 25 kA short-circuit breaking capacity.
- Current-limiting selective circuit protection.
- Total short-circuit selectivity to downstream MCBs without configuration.
- DIN-rail mounting for distribution-board installation.
Reliable Selective Protection for Three-Phase Distribution
Selective main circuit breakers coordinate with downstream protective devices so that electrical faults can be disconnected as close as possible to their source. This helps maintain power to unaffected circuits, reduces the extent of an outage and improves availability throughout an electrical distribution system.
The ABB S750 DR series is designed for group protection and selective coordination in applications ranging from building distribution to critical power systems. The S753DR-K40 combines three-phase protection with high short-circuit capability, making it suitable where dependable fault isolation and continuity of supply are key requirements.
Typical Applications
- Main protection in three-phase low-voltage distribution systems.
- Commercial and industrial distribution boards.
- Building and residential electrical distribution installations.
- Three-phase feeder circuits requiring selective protection.
- Distribution systems with downstream miniature circuit breakers.
- Critical power installations where continuity of supply is important.
Technical Specifications
| Series | S750 DR |
|---|---|
| ABB order code | 2CDH783010R0557 |
| Product type | Selective main circuit breaker (SMCB) |
| Number of poles | 3 |
| Rated current | 40 A |
| Tripping characteristic | K selective |
| Short-circuit breaking capacity | 25 kA |
| Mounting type | DIN rail |
| Weight | approx. 1.05 kg |
| EAN | 4016779879712 |
Frequently Asked Questions
What is the ABB S753DR-K40 used for?
The S753DR-K40 is used as a selective main circuit breaker for overload and short-circuit protection in three-phase low-voltage electrical distribution systems.
What is the rated current of the S753DR-K40?
The ABB S753DR-K40 has a rated current of 40 A.
How many poles does the S753DR-K40 have?
The S753DR-K40 is a 3-pole selective main circuit breaker designed for three-phase electrical distribution.
What is the breaking capacity of the S753DR-K40?
The S753DR-K40 provides a short-circuit breaking capacity of 25 kA.
What does the K selective characteristic provide?
The K selective characteristic supports coordinated operation with downstream protective devices, helping local faults to be disconnected while maintaining electrical supply to unaffected circuits.
Trusted ABB Circuit Protection
ABB S750 DR selective main circuit breakers provide dependable overload and short-circuit protection with selective coordination for electrical distribution systems where continuity of supply and reliable fault isolation are important.
