SK827044-AF ek1000-40-11-110v50hz-120v60hz ABB Contactor

Why Choose the ABB SK827044-AF EK550-40-11 Contactor?

The ABB SK827044-AF, also identified as the EK550-40-11, is a robust 4-pole industrial power contactor designed for high-current switching applications in industrial automation, power distribution and heavy-duty electrical systems. Manufactured as part of the ABB EK contactor range, this unit delivers reliable switching performance for demanding industrial environments requiring dependable motor and load control.

Designed for long operational life and stable electrical performance, the EK550-40-11 supports industrial switching duties involving large motors, heating systems, HVAC installations and infrastructure equipment. Its durable construction and integrated auxiliary contacts provide flexible integration into industrial control panels and switchgear assemblies.

With a rated operational current of up to 800 A AC-1 and 550 A AC-3, the ABB SK827044-AF is suitable for high-power industrial switching applications. The integrated 110-120 V AC 50/60 Hz control coil allows straightforward integration into global industrial control systems and automation platforms.

Key Advantages

• Heavy-duty 4-pole industrial contactor for high-current applications.
• 800 A AC-1 operational current suitable for industrial power distribution.
• 550 A AC-3 rating for large motor switching applications.
• Integrated 1 NO + 1 NC auxiliary contacts for control and signalling.
• 110-120 V AC 50/60 Hz control coil for flexible installation.
• Designed for reliable operation in demanding industrial environments.

Key Features

• ABB EK550-40-11 industrial contactor.
• 4 normally open main poles.
• 110-120 V AC 50/60 Hz control voltage.
• 800 A AC-1 rated current.
• 550 A AC-3 operational current.
• 1000 V rated operational voltage.
• 1 NO + 1 NC integrated auxiliary contacts.
• Mechanical durability designed for heavy industrial use.
• Suitable for AC and DC switching duties.
• Panel mounting format for industrial switchgear assemblies.

Technical Specifications

• Manufacturer: ABB
• Series: EK Block Contactors
• Model: EK550-40-11
• Product code: SK827044-AF
• Product type: Industrial power contactor
• Number of poles: 4P
• Main contacts: 4 NO
• Auxiliary contacts: 1 NO + 1 NC
• Control voltage: 110-120 V AC 50/60 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
• Protection rating: IP20
• Mechanical durability: up to 5 million operations
• Mounting type: Panel mounting
• Dimensions (H × W × D): approx. 272 × 270 × 225.5 mm
• Weight: approx. 15.5 kg
• Standards: IEC 60947

Reliable Industrial Power Switching Performance

Industrial contactors such as the ABB EK550-40-11 are used to control and switch high-current electrical loads in industrial automation and power systems. Their electromagnetic switching mechanism enables safe remote operation of large motors, heating equipment, pumps and industrial process systems.

The ABB EK series is engineered for demanding environments where reliable operation, long service life and stable switching performance are essential. Its suitability for industrial distribution and infrastructure systems makes it ideal for modern automation and electrical control installations.

Typical Applications

• Industrial motor control systems.
• Power distribution and switchgear equipment.
• HVAC and large ventilation installations.
• Heavy industrial machinery and automation systems.
• Railway and infrastructure applications.
• Industrial process control systems.

Trusted by Industrial Engineers Worldwide

ABB EK series contactors are trusted across industrial sectors for dependable switching performance, high-current capability and long operational life in demanding industrial applications.