ABB 1SFN165503R1000 Main Contact Kit

1. Product Overview

The ABB 1SFN165503R1000 is a Main Contact Kit designed for use with ABB low‑voltage contactors, motor starters, or electromagnetic switching devices. Main contacts are the core switching components responsible for current breaking and making. This kit is intended for replacement, repair, or refurbishment to restore switching performance and extend equipment service life.

2. Main Technical Specifications (Typical)

• Model: 1SFN165503R1000

• Product Name: Main Contact Kit

• Applicable Devices: ABB contactors / electromagnetic switches (verify specific series/model compatibility)

• Component Type: Main contact assembly

• Number of Contacts: Multi‑pole main contacts (e.g., 3‑pole configuration)

• Contact Material: Silver alloy or equivalent industrial grade for good conductivity and arc resistance

• Mechanical Life: In line with the overall contactor lifecycle

• Mounting: Plug‑in or screw replacement installation

• Application Environment: Industrial distribution and control cabinet environments

• Operating Temperature: -25 ℃ to +55 ℃

• Protection Rating: Determined by the host contactor’s enclosure (typically IP20 internal components)

⚠️ Note: Always verify compatibility with the specific contactor model when selecting a main contact kit.

3. Advantages and Features

• Restores Switching Performance
  Replaces worn or damaged main contacts to restore reliable make/break switching.

• Extends Equipment Life
  Upgrading contacts prevents poor connections or arc damage, improving longevity.

• High Conductivity & Arc Resistance
  Contact materials are optimized for low resistance and durable arc handling.

• Easy Replacement
  Modular design allows quick and straightforward replacement, reducing downtime.

• OEM‑Quality Compatibility
  Designed to match ABB original contactor specifications for precision fit and reliability.

4. Application Scenarios

• Contactor main contact replacement and maintenance

• Electromagnetic switch circuit servicing

• Low‑voltage motor starter repair

• Industrial distribution and automation system upkeep

• Routine maintenance of electrical control panels

5. Precautions for Installation and Use

1. Power Down First
   Ensure power is fully disconnected and residual voltage is absent before replacing.

2. Verify Compatibility
   Confirm the main contact kit matches the specific contactor model and rating.

3. Inspect Mechanical Condition
   Prior to replacement, inspect springs and mechanical parts for wear.

4. Clean Contact Surfaces
   Clean mating surfaces to improve conductivity and performance.

5. Secure Installation
   Install firmly and ensure proper alignment to avoid unreliable switching.

6. Test Under Load
   After installation, conduct a low‑voltage test under load to verify operation and contact temperature.

The structure and details of the product：

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