FuseBox 20A 30mA Type A B Curve 6kA Bi-Directional Mini RCBO | RTAMB20BD

20A Bi-Directional Type A Mini RCBO for FuseBox Consumer Units

The FuseBox RTAMB20BD is a compact 20A 30mA Type A bi-directional mini RCBO designed to provide combined overcurrent and residual current protection for individual circuits within compatible FuseBox consumer units.

Combining the functions of an MCB and RCD in one device, the RTAMB20BD protects against overloads, short circuits and residual current / earth leakage faults while occupying just a single module.

Its bi-directional operation makes it particularly relevant to modern electrical installations where current may flow in either direction, including appropriately designed solar PV, renewable energy and other power-generation applications.

Features

• 20A Rated Current
• 30mA Residual Operating Current
• Type A Residual Current Protection
• Bi-Directional Operation
• B Curve Tripping Characteristic
• 6kA Short-Circuit Breaking Capacity
• Combined RCD & MCB Protection
• Protects Against Overloads
• Protects Against Short Circuits
• Protects Against Earth Leakage Faults
• Detects AC & Pulsating DC Residual Currents
• Suitable Where Current May Flow in Either Direction
• Suitable for Appropriate Solar PV Applications
• 1P + N Switched Configuration
• Line & Neutral Switching
• Compact Mini RCBO Design
• Single Module Width
• 230V AC Rated Voltage
• 50/60Hz Operation
• IP20 Protection
• 35mm DIN Rail Mounting
• Designed for Compatible FuseBox Consumer Units
• IEC 61009-1 & IEC 61009-2-2 Compliant

Bi-Directional Protection for Modern Installations

A key advantage of the FuseBox RTAMB20BD is its bi-directional design.

Bi-directional protective devices are designed for applications where electrical current may flow through the device in either direction. This is increasingly relevant in installations incorporating technologies such as solar PV generation, where power flow may differ from that of a conventional load-only circuit.

This makes the RTAMB20BD a practical circuit protection option for appropriately designed modern and renewable energy installations.

Combined RCBO Circuit Protection

The RTAMB20BD combines residual current and overcurrent protection within a single protective device.

It provides protection against:

• Overloads
• Short Circuits
• Residual Current / Earth Leakage Faults

Using dedicated RCBOs on individual outgoing circuits can also improve circuit separation by providing each circuit with its own residual current and overcurrent protection.

30mA Type A Residual Current Protection

The RTAMB20BD provides 30mA Type A residual current protection.

Type A RCBOs are designed to respond to sinusoidal AC and pulsating DC residual currents, making them well suited to many modern electrical installations containing electronic equipment.

The 30mA rated residual operating current provides additional protection for appropriately designed final circuits.

20A B Curve Protection

With a rated current of 20A, the RTAMB20BD features a B Curve tripping characteristic.

The 20A rating makes this RCBO suitable for appropriately designed circuits requiring this level of overcurrent protection.

Protective device selection should always consider factors including the connected load, cable size, installation method and applicable electrical installation requirements.

6kA Short-Circuit Breaking Capacity

The FuseBox RTAMB20BD provides a rated short-circuit breaking capacity of 6000A / 6kA.

This allows the device to provide short-circuit protection within electrical installations where a 6kA rated protective device is appropriate.

Compact 1P+N Switched Design

The RTAMB20BD features a 1P + N switched configuration, providing switching of both line and neutral.

Despite incorporating residual current protection, overcurrent protection and switched-neutral functionality, its compact mini design occupies only one module within the consumer unit.

This space-saving format helps maximise available wiring and working room, particularly in consumer units containing multiple individually protected circuits.

Suitable for Solar PV & Renewable Energy Installations

As solar PV and other distributed energy technologies become increasingly common, electrical installations may need to accommodate power flowing in more than one direction.

The bi-directional capability of the RTAMB20BD makes it suitable for appropriately designed installations where this functionality is required, including relevant solar PV and renewable energy applications.

• Brand: FuseBox
• Product Code: RTAMB20BD
• Product Type: Bi-Directional Mini RCBO
• Rated Current: 20A
• Rated Residual Operating Current: 30mA
• RCD Type: Type A
• Operation: Bi-Directional
• Tripping Characteristic: B Curve, 3–5 In
• Rated Breaking Capacity: 6000A / 6kA
• Pole Configuration: 1P + N Switched
• Line & Neutral Switching: Yes
• Rated Voltage: 230V AC
• Frequency: 50/60Hz
• IP Rating: IP20
• Number of Modules: 1
• Mounting: 35mm DIN Rail
• Maximum Incoming Terminal Capacity: 16mm²
• Maximum Outgoing Terminal Capacity: 10mm²
• Incoming Recommended Tightening Torque: 2.5Nm
• Outgoing Recommended Tightening Torque: 1.2Nm
• Neutral Cable CSA: 2.5mm²
• Mechanical Endurance: 10,000 Operations
• Material: PA6 / Nylon 6
• Dimensions (H x W x D): Approx. 85 x 18 x 69.5mm
• Standards: IEC 61009-1, IEC 61009-2-2

Suitable Applications

• FuseBox Consumer Units
• Domestic Electrical Installations
• Appropriate 20A Final Circuits
• Solar PV Installations
• Renewable Energy Systems
• Applications with Bi-Directional Current Flow
• Residential Properties
• New-Build Electrical Installations
• Consumer Unit Upgrades
• Individual Circuit Protection
• Appropriate Light Commercial Installations

Why Choose the FuseBox RTAMB20BD?

The FuseBox RTAMB20BD combines 20A overcurrent protection, 30mA Type A residual current protection and bi-directional operation within a compact single-module device.

Its bi-directional capability makes it particularly relevant to modern installations where power may flow in either direction, including appropriately designed solar PV and renewable energy systems.

With a B Curve characteristic, 6kA breaking capacity and 1P+N switched configuration, the RTAMB20BD provides comprehensive individual circuit protection while making efficient use of valuable consumer unit space.