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2CDH782010R0502 ABB S752DR-E50 Selective Main Circuit Breaker 2P 50A 25kA
ABB S752DR-E50 is a 2-pole 50 A E-selective main circuit breaker with 25 kA ultimate short-circuit breaking capacity for reliable protection and selective coordination in low-voltage electrical distribution systems.
£173.64
Why Choose the ABB S752DR-E50 Selective Main Circuit Breaker?
The ABB S752DR-E50 is a high-performance 2-pole selective main circuit breaker (SMCB) designed to provide reliable overload 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 suitable for demanding residential, commercial and industrial power distribution applications.
The S752DR-E50 features ABB's E selective characteristic, providing total selectivity to downstream miniature circuit breakers and excellent selectivity to upstream protective devices through current-limiting selective operation. This helps isolate faults close to their source while reducing unnecessary interruption to unaffected circuits.
With a rated current of 50 A, a 2-pole configuration and a rated operational voltage of 400 V AC, the S752DR-E50 provides a rated ultimate short-circuit breaking capacity of 25 kA. Its DIN-rail-mounted format enables straightforward installation within low-voltage distribution boards and electrical panels.
Key Advantages
- Selective main circuit breaker designed for high-availability electrical distribution.
- 50 A rated current with a 2-pole configuration.
- 25 kA rated ultimate short-circuit breaking capacity at 400 V AC.
- E selective characteristic supports coordinated operation with downstream MCBs.
- Voltage-independent operating principle for dependable protection.
- DIN-rail mounting simplifies integration into distribution boards and control panels.
Key Features
- ABB S750 DR selective main circuit breaker series.
- 50 A rated current.
- 2-pole construction.
- E selective tripping characteristic.
- 400 V AC rated operational voltage.
- 690 V rated insulation voltage.
- 25 kA Icu and 12.5 kA Ics at 400 V AC.
- 50/60 Hz rated frequency.
- Red ON / green OFF contact-position indication.
- DIN-rail mounting with screw terminals.
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. This selective operation helps minimise unnecessary outages and maintain electrical supply to unaffected parts of an installation.
The ABB S750 DR series uses a voltage-independent operating principle and current-limiting selectivity to provide dependable protection in energy distribution systems with demanding availability requirements. The S752DR-E50 is particularly suited to installations where robust short-circuit protection and coordination with downstream MCBs are required.
Typical Applications
- Main protection in low-voltage electrical distribution systems.
- Residential and multi-occupancy electrical distribution.
- Commercial building distribution boards.
- Industrial electrical installations.
- Distribution systems with downstream miniature circuit breakers.
- Installations requiring high continuity of electrical supply.
Technical Specifications
| Series | S750 DR |
|---|---|
| ABB order code | 2CDH782010R0502 |
| EAN / GTIN | 4016779879422 |
| Product type | Selective main circuit breaker (SMCB) |
| Number of poles | 2 |
| Rated current | 50 A |
| Tripping characteristic | E selective |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 690 V |
| Rated ultimate short-circuit breaking capacity (Icu) | 25 kA at 400 V AC |
| Rated service short-circuit breaking capacity (Ics) | 12.5 kA at 400 V AC |
| Rated frequency | 50 / 60 Hz |
| Rated impulse withstand voltage | 6 kV |
| Protection rating | IP20; IP40 when installed in an enclosure with cover |
| Pollution degree | 3 |
| Overvoltage category | IV |
| Power loss | 7.6 W per pole at rated operating conditions |
| Terminal type | Screw terminals |
| Connection capacity | 2.5–50 mm² |
| Tightening torque | 2.5–3 N·m |
| Mounting type | DIN rail |
| DIN installation size | 3 |
| Operating temperature | -25 to +55 °C |
| Dimensions (H × W × D) | 130 × 54 × 96 mm |
| Weight | approx. 0.7 kg |
| Standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB S752DR-E50 used for?
The S752DR-E50 is used as a selective main circuit breaker for overload and short-circuit protection in low-voltage electrical distribution systems.
What is the rated current of the S752DR-E50?
The ABB S752DR-E50 has a rated current of 50 A.
How many poles does the S752DR-E50 have?
The S752DR-E50 is a 2-pole selective main circuit breaker.
What is the breaking capacity of the S752DR-E50?
The S752DR-E50 has a rated ultimate short-circuit breaking capacity of 25 kA at 400 V AC and a rated service short-circuit breaking capacity of 12.5 kA.
What does the E selective characteristic provide?
The E selective characteristic enables coordinated protection with downstream miniature circuit breakers, helping faults to be isolated locally while maintaining 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.
