Product Overview

The LIVE Electrical RKB120B-030 Type B RCBO is a compact single-module residual current breaker with overcurrent protection, designed to provide reliable safety in modern electrical installations. It delivers protection against overloads, short circuits and earth leakage faults, while offering advanced performance for circuits with sensitive electronic loads.

Unlike standard RCBOs, this Type B device is engineered to detect complex waveforms including smooth DC residual currents. Combined with its bi-directional power capability, it is particularly well suited to renewable energy and emerging technologies where current flow may occur in either direction.

Rated at 20A with a 30mA sensitivity and a 6kA breaking capacity, the RKB120B-030 is an ideal choice for applications such as EV charging points, solar PV systems and heat pump supplies.

Key Features & Benefits

• Type B RCBO for detection of AC, pulsating DC and smooth DC residual currents
• Single-module compact design to maximise space in consumer units
• 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 electronics

Technical Specification

• Poles: 1P+N
• Rated Current (In): 20A
• 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