ABB SK828004-AF Magnetic Contactor

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1. Product Overview

The ABB SK828004-AF is an industrial AC magnetic contactor used for remote control of motors, lighting, and heating devices. It operates by closing or opening main contacts via an electromagnetic coil, providing safe and reliable switching. The SK828004-AF offers high current carrying capacity, long service life, and strong arc resistance, making it suitable for industrial automation and power control systems.

2. Technical Specifications

• Model: SK828004-AF

• Type: AC Magnetic Contactor

• Rated Current (AC-3): 95 A

• Rated Operating Voltage: 690 V AC

• Coil Voltage: 220 V AC (common variant; optional 110 V AC / 380 V AC available)

• Poles: 3 main poles + optional auxiliary contacts

• Mechanical Life: ~10,000,000 operations

• Electrical Life (AC-3): ~600,000 operations

• Mounting: Panel or DIN rail mount

• Auxiliary Contacts: Optional 1NO + 1NC

• Operation: Electromagnetic coil

• Operating Temperature: -25°C to +60°C

• Protection Class: IP20

• Standards: IEC 60947-4-1 / UL 508

3. Advantages & Features

1. High reliability

   • Industrial-grade design ensures stable operation in high-frequency and harsh environments.

2. Long service life

   • Electrical life of 600,000 cycles and mechanical life of 10,000,000 cycles.

3. High current carrying capacity

   • Suitable for high-power motor starting and high-load switching applications.

4. Strong arc resistance

   • Optimized contact material and structure reduce wear and arcing.

5. Flexible expandability

   • Supports auxiliary contacts, timers, or protection modules for enhanced functionality.

6. Standards compliance and compatibility

   • IEC/UL compliant; compatible with other ABB industrial control devices.

4. Application Areas

• Industrial motor control (start/stop, forward/reverse)

• Lighting and electric heater control

• Power distribution systems

• Factory automation and machinery control systems

• Water treatment, elevators, and heavy industry control

5. Precautions & Recommendations

1. Rated current selection

   • Choose AC-3 rated current according to load to prevent overloading the contactor.

2. Coil voltage matching

   • Control supply voltage must match contactor coil voltage.

3. Environmental conditions

   • Avoid high temperature, humidity, and corrosive gases; ensure proper ventilation.

4. Overload and short circuit protection

   • Recommended to use with fuses or overload relays.

5. Regular maintenance

   • Inspect contact wear, terminal tightness, and coil status for reliable operation.

6. Safe operation

   • Disconnect power before installation or maintenance to prevent electric shock or mechanical injury.

The structure and details of the product：

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