Residual-current circuit breaker ABB DS202CR B16 A30 — Type B, Type A residual, 16 A, 4000 V, 36×72×86 mm

ABB DS202CR B16 A30 is a compact residual-current circuit breaker (RCBO) that integrates overcurrent protection with residual-current detection for single-phase circuits. The device combines a Type B trip curve with Type A residual-current sensing and a 30 mA sensitivity for human protection. It is built for 50 Hz systems and offers a rated current of 16 A with robust short-circuit interruption capability. The module is a two-pole, two-module unit designed for DIN-rail mounting, providing coordinated protection against overloads, short circuits and earth leakage in residential and light-commercial electrical installations.

Advantages

The DS202CR B16 A30 provides combined functions in a space-saving two-module footprint, reducing the number of separate components required in a distribution board. Type B trip characteristics allow reliable protection for circuits with moderately inductive or capacitive loads, and Type A residual-current detection covers pulsating direct and alternating leakage currents. The 30 mA sensitivity offers protection against indirect and additional protection against direct contact. Its DIN-rail format and standardized dimensions simplify installation and replacement in common distribution systems.

Suitable for

Key specifications

How to use

Install the RCBO on a standardized DIN-rail inside the distribution board, ensuring the device is mounted and connected according to applicable national wiring regulations. Connect the phase and neutral conductors to the designated terminals, and ensure proper tightening of terminal screws to the torque values specified by the manufacturer's installation guide. Use the device to protect a single-phase branch circuit; verify correct operation after installation by performing a functional test using the built-in test button or an appropriate test instrument. Ensure upstream protection and coordination with other protective devices in the installation.

Recommendations

Use this RCBO where both overcurrent and earth-leakage protection are required in a single, compact device. Test the residual-current function regularly (for example, monthly) using the test button and follow local safety regulations for maintenance and periodic inspection.