ABB S281UC-K6A Circuit Breaker

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1. Product Overview

The ABB S281UC-K6A Circuit Breaker is a single-pole miniature circuit breaker (MCB) from the ABB S200 series. It is designed for low-voltage distribution systems in residential, commercial, and industrial applications, providing reliable overload and short-circuit protection. The breaker features fast response, reliable operation, and compatibility with standard DIN rail mounting, making it a key component for safe electrical distribution.

2. Technical Specifications

• Model: S281UC-K6A

• Product Type: Miniature Circuit Breaker (MCB)

• Series: S200 / S281UC

• Poles: 1P (single pole)

• Rated Current: 6 A

• Rated Voltage: 230/400 V AC

• Breaking Capacity: 6 kA (AC)

• Tripping Characteristic: Type C (general-purpose for inductive and resistive loads)

• Mounting: DIN rail

• Operating Frequency: 50 / 60 Hz

• Mechanical Life: ≥ 10,000 operations

• Electrical Life: ≥ 4,000 operations

• Ambient Temperature: –25 °C to +40 °C

• Degree of Protection: IP20

• Standards: IEC 60898-1 / EN 60898-1

3. Advantages and Features

1. Fast and Reliable Protection
   Provides rapid tripping for overload and short-circuit conditions.

2. Standardized Installation
   Compatible with DIN rail for easy integration into panels.

3. Wide Temperature Range
   Stable operation from –25 °C to +40 °C.

4. Long Lifespan
   Durable mechanical and electrical life reduces maintenance needs.

5. High Compatibility
   Can be combined with ABB S200 series accessories, including auxiliary and signal contacts.

4. Applications

• Residential distribution systems

• Commercial low-voltage distribution

• Industrial control and motor protection

• Lighting and power circuits

• Distribution boards and switchgear

5. Installation and Usage Notes

1. Ensure the power supply is disconnected before installation.

2. Confirm rated current, pole number, and tripping characteristic match circuit requirements.

3. Avoid sustained operation above rated current to prevent reduced service life.

4. Periodically check mounting and contact integrity.

5. Avoid installation in high-humidity or corrosive environments; provide protection if necessary.