2CDH781010R0162 ABB S751DR-E16 16 A 1-Pole E Selective 25 kA Main Circuit Breaker

Why Choose the ABB S751DR-E16 Selective Main Circuit Breaker?

The ABB S751DR-E16 is a high-performance single-pole selective main circuit breaker (SMCB) designed to provide overload and short-circuit protection in electrical distribution systems where high continuity of supply and coordinated protection are important. Part of the ABB S750 DR series, it combines selective protection with a voltage-independent operating principle for dependable distribution applications.

The S751DR-E16 provides E selective tripping characteristics and is engineered to achieve total selectivity with downstream miniature circuit breakers while providing excellent selectivity with upstream protective devices. ABB's current-limiting selectivity principle helps localise electrical faults so that downstream protective devices can clear appropriate faults without unnecessarily disconnecting larger parts of the installation.

With a rated current of 16 A, a single-pole configuration and a rated ultimate short-circuit breaking capacity of 25 kA at 230 V AC, the S751DR-E16 is suitable for demanding power distribution installations. Its DIN-rail format provides straightforward integration into compatible distribution boards, while ABB order code 2CDH781010R0162 identifies this specific E-characteristic model.

Key Advantages

• Selective main circuit breaker designed for coordinated electrical protection.
• 16 A rated current with single-pole configuration.
• E selective tripping characteristic.
• High 25 kA ultimate short-circuit breaking capacity at 230 V AC.
• Voltage-independent operating principle for dependable circuit protection.
• Designed to provide total selectivity with downstream MCBs.
• Current-limiting selectivity supports high availability in electrical distribution systems.
• Compact DIN-rail mounting for distribution-board installation.

Key Features

• ABB S750 DR selective main circuit breaker series.
• 16 A rated current.
• Single-pole configuration.
• E selective tripping characteristic.
• 230 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.
• Red ON / green OFF contact-position indication.
• Screw-terminal electrical connections.
• IP20 / IP40 protection degree.
• DIN-rail mounting for modular distribution equipment.

Reliable Selective Protection for Electrical Distribution

Selective main circuit breakers such as the ABB S751DR-E16 are designed to coordinate with other protective devices in an electrical installation. Selectivity helps ensure that the protective device nearest a fault operates first, reducing unnecessary interruption to unaffected circuits and supporting improved continuity of electrical supply.

The ABB S750 DR series operates independently of the supply voltage and does not require a separate control circuit to open or close its contacts. Combined with ABB's current-limiting selectivity principle, this makes the range particularly suitable for energy distribution systems where dependable protection and high system availability are required.

Typical Applications

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