Product Overview

The LIVE Electrical RKB125B-030 Type B RCBO is a compact single-module residual current breaker with overcurrent protection, providing dependable circuit safety for today’s electrical systems. It safeguards against overload currents, short circuits and earth leakage faults, while supporting advanced applications where DC residual currents may be present.

This Type B RCBO is designed to detect AC, pulsating DC and smooth DC residual currents, making it particularly suitable for installations featuring modern power electronics and renewable technologies. Its bi-directional capability makes it ideal for circuits where current flow may occur in either direction.

Rated at 25A with 30mA residual current sensitivity and a 6kA breaking capacity, the RKB125B-030 is an excellent choice for protecting supplies to EV charging equipment, solar PV systems and heat pumps.

Key Features & Benefits

• Type B RCBO for detection of AC, pulsating DC and smooth DC residual currents
• Compact single-module design to maximise space in distribution boards
• Bi-directional supply capability for modern energy systems
• Combined protection against overload, short circuit and earth leakage
• 30mA sensitivity for enhanced personal protection
• B-curve tripping characteristic
• Ideal for EV chargers, solar panels, heat pumps and sensitive electronic loads

Technical Specification

• Poles: 1P+N
• Rated Current (In): 25A
• Rated Frequency: 50/60Hz
• Rated Operating Voltage: 230/240V~
• Insulation Voltage (Ui): 500V
• Impulse Withstand Voltage (Uimp): 4kV (1.2/50µs)
• Residual Current Sensitivity: 30mA
• Breaking Capacity: 6kA
• Device Type: Type B
• Tripping Curve: B
• Maximum Terminal Cable Size: 16mm²
• Terminal Torque: 2.0Nm
• Ingress Protection: IP20
• Direction of Supply: Bi-Directional
• Standards: IEC/EN 61009-1, IEC/EN 62423

Downloads

Data Sheet:
Click here to download the RKB Type B single-module RCBO data sheet

LIVE Electrical Catalogue:
Click here to view the LIVE Electrical catalogue