ABB S263B10-400 Three-pole Circuit Breaker

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1. Product Overview

The ABB S263B10-400 is a high-performance three-pole miniature circuit breaker (MCB) designed for low-voltage distribution systems. It provides reliable overload and short-circuit protection for electrical equipment and circuits. The breaker has a B-type tripping characteristic, suitable for resistive and light inductive loads such as lighting, sockets, and small motors. It features reliable operation, compact size, and easy installation, widely used in residential, commercial, and light industrial applications.

2. Technical Specifications

Electrical Specifications

• Model: S263B10-400

• Rated Current (In): 10 A

• Poles: 3P (three-pole)

• Rated Operating Voltage (Ue): 400 V AC

• Breaking Capacity (Icu): 6 kA (AC)

• Insulation Voltage Between Poles: 4 kV

• Tripping Characteristic: B type (3–5×In)

• Rated Frequency: 50/60 Hz

• Mechanical Life: ≥ 10,000 operations

• Electrical Life: ≥ 4,000 operations

Environmental & Installation

• Operating Temperature: –5°C … +40°C

• Protection Degree: IP20 (cabinet installation)

• Mounting: DIN rail

• Dimensions (WxHxD): 54 mm × 81 mm × 73 mm

• Weight: Approx. 0.25 kg

Additional Features

• Compatible with ABB bus modules and residual current devices

• Manual operation and status indication

• Quick installation and removal for maintenance

3. Advantages & Key Features

1. Reliable overload and short-circuit protection — Accurate operation protects circuits and equipment.

2. B-type tripping — Suitable for resistive and light inductive loads.

3. Compact installation — DIN rail mounting saves space.

4. High safety — Complies with IEC/EN 60898-1 standards.

5. Easy maintenance — Modular design allows easy replacement.

6. Versatile applications — Suitable for residential, commercial, and light industrial distribution.

4. Application Areas

• Residential and commercial lighting and socket protection

• Small industrial distribution systems

• HVAC systems and auxiliary equipment

• Automation equipment and control cabinet circuits

• Small motors and electrical equipment protection

• Low-voltage distribution and control panels

5. Precautions

1. Verify rated current matches the load before installation to prevent nuisance tripping or damage.

2. Install in a dry, ventilated environment, avoiding high humidity and dust.

3. Follow wiring diagrams to ensure correct polarity and reliable connections.

4. Avoid prolonged overload operation to extend breaker life.

5. Periodically check breaker condition and mechanical operation for long-term safety.

6. Disconnect power before installation or maintenance to ensure safety.

The structure and details of the product：

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