ABB 1SFN164303R1000 Main contact assembly

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1. Product Overview

The ABB 1SFN164303R1000 is a Main Contact Assembly designed for ABB high-current AC contactors. It is the core component responsible for making and breaking the main power circuit during contactor operation. The performance of this assembly directly affects current-carrying capacity, electrical lifetime, and operational safety.

Manufactured with high-conductivity and arc-resistant materials, this main contact assembly is ideal for high-load and high-duty industrial applications and is a key spare part for maintenance and service.

2. Technical Specifications

• Model: 1SFN164303R1000

• Product Type: Main Contact Assembly

• Applicable Equipment: ABB high-power AC contactors (specific SFN series models)

• Number of Poles: 3-pole (three-phase main circuit)

• Rated Operational Voltage (Ue): Up to AC 690 V

• Rated Insulation Voltage (Ui): 1000 V

• Rated Operational Current (Ie): Depends on the matched contactor rating

• Contact Material: Silver alloy (Ag-based composite)

• Mounting: Internal, replaceable assembly

• Operating Temperature: -25 ℃ to +55 ℃

• Standards: IEC 60947-4-1

3. Advantages & Features

1. Original ABB Design
   Precisely engineered to match ABB contactor structure and performance.

2. Excellent Electrical Conductivity
   High-quality silver alloy contacts ensure low contact resistance and reduced heating.

3. High Arc Resistance
   Designed for frequent switching and heavy-duty applications.

4. Extended Contactor Lifetime
   Replacing the main contact assembly significantly extends the service life of the contactor.

5. Cost-Effective Maintenance
   Allows refurbishment without replacing the entire contactor.

6. Reliable Under Heavy Loads
   Suitable for high-current and high-inrush industrial loads.

4. Application Areas

• Industrial motor control systems

• Maintenance and overhaul of AC contactors

• Power distribution and control panels

• Pumps, fans, and compressors

• Metallurgy, mining, and chemical industries

• Automation system maintenance

5. Notes & Precautions

1. Always disconnect power completely before replacement.

2. Ensure the assembly is fully compatible with the specific contactor model.

3. Install according to ABB technical guidelines to avoid misalignment.

4. Check contact pressure and alignment after installation.

5. Avoid exposure to corrosive or heavily contaminated environments.

6. Inspect contact wear periodically to prevent excessive erosion.