AEG HS91.3E50SAV Selective Main Circuit Breaker SHU 25kA E-Char. 50A 3-Pole 2CDS781055R4502

The AEG HS91.3E50SAV is a selective main circuit breaker (SHU) engineered for demanding electrical distribution applications where coordination and reliability are paramount. Unlike standard miniature circuit breakers, this 3-pole device features an E-characteristic tripping curve, providing time-delayed protection that allows downstream breakers to clear faults first, ensuring selective coordination and minimizing unnecessary downtime. With a rated current of 50 A and a short-circuit breaking capacity of 25 kA, it is built to handle high fault currents in commercial and industrial installations.

Highlights

• Selective main circuit breaker (SHU) with E-characteristic for optimal coordination
• Rated current: 50 A, 3-pole, rated voltage 230/400 V AC
• High breaking capacity: 25 kA according to IEC/EN 60947-2
• DIN rail mounting with screw terminals for conductors up to 50 mm²
• Wide operating temperature range: -25°C to +55°C

In daily use

Installed at the origin of a distribution board, the HS91.3E50SAV acts as the main protective device, safeguarding the entire installation while allowing downstream MCBs to operate selectively. Its robust construction and IP40 housing (IP20 at terminals) ensure reliable operation even in challenging environments. The screw terminals accept a wide range of conductor sizes, simplifying installation and maintenance.

Full specifications

• Product type: Selective main circuit breaker (SHU)
• Number of poles: 3
• Tripping characteristic: E (selective)
• Rated operational voltage (Ue): 230/400 V AC
• Rated insulation voltage (Ui): 440 V AC
• Rated impulse withstand voltage (Uimp): 6 kV
• Frequency: 50/60 Hz
• Mounting type: DIN rail
• Terminal type: Screw terminals
• Terminal capacity: 1.5 - 50 mm²
• Degree of protection: IP20 (terminals), IP40 (housing)
• Energy limiting class: 3
• Operating temperature range: -25 to +55 °C

Final note

The AEG HS91.3E50SAV delivers selective protection and high breaking capacity, making it a dependable choice for main distribution in commercial and industrial settings.