ABB S4N250-BW Three-Pole Circuit Breaker

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1. Overview

The ABB S4N250-BW Three-Pole Circuit Breaker is a high-performance industrial breaker designed for overload and short-circuit protection in low-voltage distribution systems. It features fast tripping capability, reliable mechanical durability, and precise overload protection, suitable for industrial, commercial, and infrastructure power systems. The S4N250-BW is recognized for its high safety, durability, and flexible installation in various environments.

2. Technical Specifications

3. Advantages and Features

1. High Breaking Capacity – Supports up to 50 kA short-circuit protection for system safety.

2. High Reliability – Mechanical lifespan up to 10,000 operations, suitable for industrial use.

3. Precise Protection – Fast overload and short-circuit response minimizes equipment damage.

4. Easy Installation – DIN rail or panel mounting for versatile wiring setups.

5. High Safety – Compliant with IEC standards, ensuring personnel and equipment protection.

6. Easy Maintenance – Modular design allows easy inspection and servicing.

4. Applications

• Industrial power distribution systems

• Commercial buildings and infrastructure

• Industrial automation production lines

• Motor and machinery protection

• Data centers and communication rooms

• Energy management and distributed grids

5. Installation and Maintenance Notes

1. Use Within Rated Parameters – Ensure current, voltage, and short-circuit protection match specifications.

2. Environmental Conditions – Operating temperature -25~60°C; avoid high humidity and corrosive environments.

3. Proper Wiring – Follow wiring diagrams and installation instructions to prevent faults.

4. Regular Inspection – Check terminals, operating mechanisms, and breaker condition.

5. Professional Installation – Should be installed and commissioned by qualified electricians or engineers.

6. Prevent Misoperation – Observe safety markings and protective measures during operation.

The structure and details of the product：

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