SK827041-AR ek550-40-11-400-415v50hz ABB Contactor

Why Choose the ABB SK827041-AR EK550-40-11 Contactor?

The ABB SK827041-AR, also known as the EK550-40-11 400-415V 50Hz, is a heavy-duty 4-pole industrial contactor engineered for demanding AC and DC switching duties in industrial distribution systems, railway infrastructure and large automation installations. Designed as part of the ABB EK series, this contactor delivers dependable high-current switching performance for critical industrial applications.

Built for operational reliability and long electrical life, the EK550-40-11 supports high operational currents while maintaining stable performance in demanding industrial environments. Its rugged design, integrated auxiliary contacts and high mechanical durability make it ideal for motor control centres, switchgear assemblies and industrial power distribution systems.

With a rated operational current of up to 800 A AC-1 and 550 A AC-3, the ABB SK827041-AR is suitable for switching large industrial motors, HVAC systems, distribution equipment and railway applications. The integrated 400-415 V AC 50 Hz control coil enables seamless integration into industrial control systems and electrical panels.

Key Advantages

• Heavy-duty 4-pole contactor designed for industrial distribution systems.
• 800 A AC-1 operational current for high-power switching applications.
• 550 A AC-3 current rating suitable for industrial motor control.
• Integrated 1 NO + 1 NC auxiliary contacts for control and signalling.
• Suitable for both AC and DC switching duties.
• Robust ABB design for demanding industrial and railway applications.

Key Features

• ABB EK550-40-11 industrial contactor.
• 4-pole configuration with 4 NO main contacts.
• 400-415 V AC 50 Hz control voltage.
• 800 A AC-1 rated operational current.
• 550 A AC-3 operational current rating.
• 1000 V rated operational voltage.
• 1 normally open and 1 normally closed auxiliary contact.
• Mechanical durability up to 5 million operating cycles.
• IP20 protection degree at coil terminals.
• Designed for industrial panel and switchgear mounting.

Technical Specifications

• Manufacturer: ABB
• Series: EK Block Contactors
• Model: EK550-40-11
• Product code: SK827041-AR
• Product type: Industrial power contactor
• Number of poles: 4P
• Main contacts: 4 NO
• Auxiliary contacts: 1 NO + 1 NC
• Control voltage: 400-415 V AC 50 Hz
• Rated operational voltage: 1000 V
• Rated operational current AC-1: 800 A
• Rated operational current AC-3: 550 A
• Rated operational power AC-3 at 400 V: approx. 280 kW
• Rated impulse withstand voltage: 8 kV
• Mechanical durability: 5 million operations
• Protection rating: IP20
• Mounting type: Panel mounting
• Dimensions (H × W × D): approx. 272 × 270 × 225.5 mm
• Weight: approx. 15.5 kg
• Standards: IEC 60947

Reliable High-Current Switching for Industrial Systems

Industrial power contactors such as the ABB EK550-40-11 are designed to safely switch high-current electrical loads in industrial automation, power distribution and heavy-duty motor control applications. Their electromagnetic switching mechanism enables reliable remote operation of large motors, HVAC equipment and industrial process systems.

The ABB EK series is widely used in demanding industrial environments where reliable switching, long service life and robust electrical performance are critical. Its suitability for AC and DC switching makes it ideal for infrastructure, railway and industrial process applications.

Typical Applications

• Industrial motor control systems.
• Power distribution and switchgear assemblies.
• Railway and transport infrastructure.
• Large HVAC and ventilation systems.
• Industrial automation equipment.
• Heavy-duty machinery and process control installations.

Trusted by Industrial Engineers Worldwide

ABB EK series contactors are trusted across industrial sectors for dependable high-current switching performance, long operational life and reliable integration into critical industrial infrastructure.