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2CDH782010R0402 ABB S752DR-E40 Selective Main Circuit Breaker 40 A 2P 25 kA
ABB S752DR-E40 selective main circuit breaker, a 40 A two-pole Type E device with 25 kA breaking capacity at 400 V AC for selective protection in electrical distribution systems.
£173.64
Why Choose the ABB S752DR-E40 Selective Main Circuit Breaker?
The ABB S752DR-E40 is a high-performance selective main circuit breaker (SMCB) designed to provide reliable overcurrent and short-circuit protection in electrical distribution systems where continuity of supply and selective coordination are important. As part of the ABB S750 DR series, it uses a voltage-independent operating principle and is engineered for dependable protection in residential, commercial and industrial power distribution applications.
This selective circuit breaker provides total selectivity towards downstream miniature circuit breakers and outstanding selectivity towards upstream protective devices through ABB's current-limiting selectivity principle. Its voltage-independent operation means that no separate control circuit is required to make or break the main contacts, helping provide reliable protection even in demanding distribution installations.
With a rated current of 40 A, two-pole configuration, Type E selective tripping characteristic and a rated short-circuit breaking capacity of 25 kA at 400 V AC, the S752DR-E40 provides robust protection for electrical distribution circuits. Its DIN-rail mounting format enables straightforward integration into compatible distribution boards and electrical enclosures.
Key Advantages
- Selective main circuit breaker for high-availability electrical distribution systems.
- 40 A rated current with a two-pole configuration.
- Type E selective tripping characteristic for coordinated circuit protection.
- 25 kA short-circuit breaking capacity at 400 V AC.
- Voltage-independent operating principle requiring no separate control circuit for contact operation.
- Designed to provide total selectivity towards downstream MCBs and excellent coordination with upstream protective devices.
Key Features
- ABB S750 DR selective main circuit breaker series.
- 40 A rated current.
- 2-pole configuration.
- 400 V AC rated operational voltage.
- 25 kA rated short-circuit breaking capacity.
- Type E selective tripping characteristic.
- 690 V rated insulation voltage.
- 50 / 60 Hz rated frequency.
- Suitable for isolation.
- DIN-rail mounting for integration into electrical distribution equipment.
Reliable Selective Protection for Electrical Distribution
Selective main circuit breakers are designed to coordinate with other protective devices so that a fault can be disconnected as close as possible to its source while unaffected circuits remain operational. This approach can improve continuity of supply and reduce unnecessary interruption across electrical distribution systems.
The ABB S750 DR series combines current-limiting selectivity with a voltage-independent operating principle. The S752DR-E40 is therefore particularly suitable for distribution systems with demanding availability requirements, providing coordinated protection with downstream miniature circuit breakers while supporting reliable isolation and circuit protection.
Typical Applications
- Main circuit protection in electrical distribution systems.
- Residential and multi-residential electrical installations.
- Commercial buildings and distribution boards.
- Industrial power distribution systems.
- Installations requiring selective coordination with downstream MCBs.
- Electrical systems where continuity and availability of supply are important.
Technical Specifications
| Series | S750 DR |
|---|---|
| ABB order code | 2CDH782010R0402 |
| EAN | 4016779879415 |
| Product type | Selective main circuit breaker (SMCB) |
| Rated current | 40 A |
| Number of poles | 2 |
| Tripping characteristic | E (Selective) |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 690 V |
| Rated frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 25 kA at 400 V AC |
| Rated ultimate short-circuit breaking capacity (Icu) | 25 kA at 400 V AC |
| Standard | IEC/EN 60947-2 |
| Mounting type | DIN rail |
| Dimensions (W × H × D) | 54 × 130 × 96 mm |
| Weight | approx. 0.7 kg |
Frequently Asked Questions
What is the ABB S752DR-E40 used for?
The S752DR-E40 is a selective main circuit breaker used for overcurrent and short-circuit protection in electrical distribution systems where selective coordination and continuity of supply are important.
What is the rated current of the S752DR-E40?
The ABB S752DR-E40 has a rated current of 40 A and uses a two-pole configuration.
What is the breaking capacity of the S752DR-E40?
The S752DR-E40 has a rated short-circuit breaking capacity of 25 kA at 400 V AC.
What does the Type E characteristic mean?
The S752DR-E40 uses ABB's Type E selective characteristic, designed for selective main circuit protection and coordinated operation with other protective devices in the electrical distribution system.
How is the ABB S752DR-E40 installed?
The S752DR-E40 is designed for DIN-rail mounting in suitable electrical distribution boards and enclosures.
Trusted Circuit Protection from ABB
ABB S750 DR selective main circuit breakers provide robust, voltage-independent circuit protection and selective coordination for residential, commercial and industrial electrical distribution systems where reliable continuity of supply is required.
