ABB DS201MA Residual Current Circuit Breaker

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1. Product Overview

The ABB DS201MA is a two-pole residual current circuit breaker (RCCB) designed to detect earth leakage currents in AC systems. When the residual current reaches the preset value, the device disconnects the circuit rapidly, providing effective protection against electric shock and electrical fires. The DS201MA features a compact design and high reliability for low-voltage distribution applications.

2. Technical Specifications

• Model: DS201MA

• Product Type: Residual Current Circuit Breaker (RCCB)

• Number of Poles: 2P

• Rated Operating Voltage: 230 V AC

• Rated Frequency: 50 / 60 Hz

• Rated Current (In): 16 A / 25 A / 40 A / 63 A (depending on version)

• Rated Residual Operating Current (IΔn):

  • 30 mA (personal protection)

  • 100 mA / 300 mA (fire protection, depending on version)

• Residual Current Type: Type AC / Type A

• Tripping Principle: Electromagnetic

• Mounting: DIN rail mounting

• Mechanical Life: ≥ 20,000 operations

• Electrical Life: ≥ 10,000 operations

• Protection Degree: IP20

• Operating Temperature: -25 °C to +55 °C

• Standards: IEC / EN 61008

3. Key Advantages & Features

• High Sensitivity Leakage Protection – Rapid response to earth leakage currents.

• Compact Design – Easy installation on standard DIN rails.

• High Reliability – Proven ABB design for long-term stable operation.

• Wide Range of Ratings – Multiple current and sensitivity options available.

• Easy Maintenance – Integrated test button for periodic functional testing.

4. Typical Applications

The ABB DS201MA is commonly used in:

• Residential and commercial distribution systems

• Industrial low-voltage distribution circuits

• Office buildings, hotels, and public facilities

• Lighting and socket outlet circuits

• Leakage protection for small equipment and control circuits

5. Installation & Usage Notes

• Correct Selection – Choose the appropriate rated current and residual current according to application requirements.

• Regular Testing – Use the test button periodically to verify proper operation.

• Coordination with Protection Devices – RCCBs do not provide overload or short-circuit protection and must be used together with MCBs or fuses.

• Proper Wiring – Follow terminal markings carefully to avoid wiring errors.

• Installation Environment – Install in a dry distribution board free from excessive vibration or corrosive gases.