FuseBox 40A 30mA Type A B Curve 6kA Bi-Directional Mini RCBO | RTAMB40BD

40A Bi-Directional Type A Mini RCBO for FuseBox Consumer Units

The FuseBox RTAMB40BD is a compact 40A 30mA Type A bi-directional mini RCBO designed to provide combined residual current and overcurrent protection for individual circuits within compatible FuseBox consumer units.

Combining the functions of an MCB and RCD in a single protective device, the RTAMB40BD provides protection against overloads, short circuits and residual current / earth leakage faults.

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 distributed generation systems.

Features

• 40A 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
• Ideal 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

The standout feature of the FuseBox RTAMB40BD is its bi-directional capability.

In conventional electrical installations, electricity generally flows from the supply towards the connected load. However, modern installations incorporating local generation can require power to flow in either direction through parts of the electrical system.

The RTAMB40BD is designed to accommodate this bi-directional power flow, providing an appropriate circuit protection option where a 40A bi-directional RCBO is specified.

Ideal for Solar PV & Renewable Energy Systems

Solar PV and other distributed generation systems can introduce different power-flow requirements compared with conventional load-only circuits.

The bi-directional design of the RTAMB40BD makes it particularly relevant to appropriately designed renewable energy installations where current may flow in either direction.

Its 40A rating also provides an option for applications requiring a higher current rating than the smaller devices within the RTAMB bi-directional RCBO range.

Combined RCBO Circuit Protection

The RTAMB40BD combines residual current protection and overcurrent protection within one compact device.

It provides protection against:

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

Individual RCBO protection can also improve circuit separation by providing each outgoing circuit with dedicated residual current and overcurrent protection.

30mA Type A Residual Current Protection

The RTAMB40BD provides 30mA Type A residual current protection.

Type A RCBOs are designed to detect sinusoidal AC and pulsating DC residual currents, making them particularly relevant to modern installations incorporating electronic equipment.

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

40A B Curve Protection

With a rated current of 40A, the RTAMB40BD uses a B Curve tripping characteristic.

Its 40A rating makes it suitable for appropriately designed circuits requiring this level of overcurrent protection.

Protective device selection should always consider the connected load, conductor size, installation method, prospective fault current and applicable electrical installation requirements.

6kA Short-Circuit Breaking Capacity

The FuseBox RTAMB40BD has a rated short-circuit breaking capacity of 6000A / 6kA.

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

Compact 1P+N Switched Design

The RTAMB40BD features a 1P + N switched configuration, providing switching of both line and neutral.

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

This space-saving design helps provide additional wiring and working room, particularly where multiple outgoing circuits require individual RCBO protection.

• Brand: FuseBox
• Product Code: RTAMB40BD
• Product Type: Bi-Directional Mini RCBO
• Rated Current: 40A
• 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 40A Final Circuits
• Solar PV Installations
• Renewable Energy Systems
• Distributed Generation Systems
• Applications with Bi-Directional Power Flow
• Residential Properties
• New-Build Electrical Installations
• Consumer Unit Upgrades
• Individual Circuit Protection
• Appropriate Light Commercial Installations

Why Choose the FuseBox RTAMB40BD?

The FuseBox RTAMB40BD combines 40A 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 electrical systems where current may flow in either direction, including appropriately designed solar PV and renewable energy installations.

With a B Curve characteristic, 6kA breaking capacity and 1P+N switched configuration, the RTAMB40BD delivers comprehensive individual circuit protection while making efficient use of available consumer unit space.