2CDH782010R0202 ABB S752DR-E20 20 A 2-Pole E Selective 25 kA Main Circuit Breaker

Why Choose the ABB S752DR-E20 Selective Main Circuit Breaker?

The ABB S752DR-E20 is a high-performance two-pole selective main circuit breaker (SMCB) designed to provide dependable overload and short-circuit protection in electrical distribution systems where selective coordination and continuity of supply are important. Part of the ABB S750 DR series, it combines a 20 A rated current, E selective tripping characteristic and high short-circuit breaking capacity.

The S752DR-E20 operates according to a voltage-independent principle and does not require a control circuit to open or close its contacts. The S750 DR range is designed to provide total selectivity with downstream miniature circuit breakers and excellent selectivity with upstream protective devices through current-limiting selectivity, helping localise electrical faults and minimise unnecessary interruption to unaffected circuits.

With a two-pole configuration, 400 V AC rated operational voltage and a rated ultimate short-circuit breaking capacity of 25 kA at 400 V AC, the S752DR-E20 is suited to demanding energy-distribution applications. Its DIN-rail format supports straightforward installation in compatible distribution equipment, while ABB order code 2CDH782010R0202 identifies this specific 20 A E-characteristic model.

Key Advantages

• Selective main circuit breaker for coordinated electrical protection.
• 20 A rated current with two-pole configuration.
• E selective tripping characteristic.
• High 25 kA ultimate short-circuit breaking capacity at 400 V AC.
• Voltage-independent operating principle for dependable circuit protection.
• Designed for total selectivity with downstream MCBs.
• Current-limiting selectivity helps maintain supply to unaffected circuits.
• DIN-rail mounting for integration into electrical distribution equipment.

Key Features

• ABB S750 DR selective main circuit breaker series.
• 20 A rated current.
• Two-pole configuration.
• E selective tripping characteristic.
• 400 V AC rated operational voltage.
• 25 kA rated ultimate short-circuit breaking capacity (Icu).
• 12.5 kA rated service short-circuit breaking capacity (Ics).
• 50/60 Hz rated frequency.
• Rated insulation voltage of 690 V.
• Rated impulse withstand voltage of 6 kV.
• Red ON / green OFF contact-position indication.
• Screw-terminal electrical connections.
• IP20 / IP40 protection degree.
• DIN-rail mounting for modular distribution systems.

Reliable Selective Protection for Electrical Distribution

Selective main circuit breakers such as the ABB S752DR-E20 coordinate with other protective devices so that electrical faults can be disconnected as locally as possible. This selective operation helps reduce unnecessary interruption to unaffected circuits, supporting improved continuity and availability throughout the electrical distribution system.

The ABB S750 DR series combines voltage-independent operation with current-limiting selectivity. This makes the range particularly suitable for energy-distribution systems where dependable overload and short-circuit protection must be combined with effective coordination between upstream and downstream protective devices.

Typical Applications

• Electrical energy distribution systems requiring selective protection.
• Main distribution and sub-distribution boards.
• Commercial and industrial electrical installations.
• Building power distribution systems.
• Installations requiring coordination with downstream miniature circuit breakers.
• Distribution systems where continuity and availability of supply are priorities.