ABB UA110-30-11 three-phase contactor

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ABB UA110-30-11 Three-phase Contactor – Product Information

1. Product Overview

The ABB UA110-30-11 Three-phase Contactor is a high-performance industrial switching device designed for reliable control of electric motors and power circuits up to 110 A.
It provides excellent electrical endurance, compact design, and flexible mounting options. With one normally open (NO) and one normally closed (NC) auxiliary contact, it integrates seamlessly with overload relays and automation systems for efficient motor protection and control.

2. Technical Specifications

• Model: UA110-30-11

• Type: Three-phase AC Contactor

• Rated Operational Current (Ie): 110 A (AC-3, 400 V)

• Rated Operational Voltage (Ue): 690 V AC, 50/60 Hz

• Control Voltage (Uc): 24 V / 110 V / 230 V AC (optional)

• Rated Insulation Voltage (Ui): 1000 V

• Impulse Withstand Voltage (Uimp): 8 kV

• Operating Frequency: 50/60 Hz

• Auxiliary Contacts: 1 NO + 1 NC

• Mechanical Life: 10 million operations

• Electrical Life: 1 million operations (AC-3)

• AC-3 Power Ratings:

  • 400 V: 55 kW

  • 500 V: 75 kW

  • 690 V: 90 kW

• Coil Consumption: 70 VA (pick-up), 8 VA (holding)

• Mounting: DIN rail or screw mounting

• Terminal Type: Screw terminals

• Operating Temperature: -25 ℃ to +55 ℃

• Storage Temperature: -40 ℃ to +80 ℃

• Protection Class: IP20

• Certifications: IEC 60947-4-1, CE, UL, CSA, RoHS

3. Features and Advantages

1. High reliability with silver alloy contacts ensuring long service life.

2. Modular design for easy integration with overload relays and accessories.

3. Low coil power consumption for energy efficiency.

4. Compact and vibration-resistant structure for harsh environments.

5. Flexible installation with multi-angle mounting options.

6. Wide control voltage range suitable for global applications.

4. Application Areas

• Motor control systems (start/stop switching)

• Pumps, fans, and compressors

• Industrial automation panels

• Lighting and distribution systems

• HVAC control systems

• Machinery and process line automation

5. Precautions

1. Verify that the coil voltage matches the control power before installation.

2. Ensure firm terminal connections to avoid overheating.

3. Install in a dry, well-ventilated location free from corrosive gases.

4. Do not exceed rated current or voltage.

5. Inspect contact wear and insulation regularly.

6. Perform insulation tests before reusing after long storage.

The structure and details of the product：

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