Lewden 20A 30mA Type A Compact RCBO 1P+N B Curve 6kA 1 Module | RCBO-B20/30/SPA

Compact Single Module Type A RCBO with 20A B Curve Protection

The Lewden 20A Compact RCBO combines overcurrent, short-circuit and residual current protection within a space-saving single-module device. Designed for DIN rail installation, it provides individual circuit protection while occupying only 18mm / 1 module within a compatible consumer unit or distribution board.

Featuring a 20A B Curve characteristic, 30mA Type A residual current protection and 6kA short-circuit breaking capacity, this RCBO is particularly suited to lower-current circuits such as lighting and other applications requiring combined overcurrent and additional residual current protection.

Features

• 20A Rated Current
• B Curve Tripping Characteristic
• Type A RCBO
• 30mA Residual Current Protection
• 6kA Short-Circuit Capacity
• 1P+N Configuration
• Compact 1 Module Design
• Only 18mm Wide
• 230V Rated Operating Voltage
• 50/60Hz Frequency
• DIN Rail Mounting
• Accepts 1–16mm² Cables
• Combined Overload & Short-Circuit Protection
• Residual Current Protection
• Complies with BS EN 61009-1

Combined Circuit Protection

An RCBO combines the functions normally associated with an MCB and RCD in a single protective device.

The Lewden compact RCBO protects an individual circuit against overloads and short circuits, while its 30mA residual current function provides protection against earth leakage currents.

Using individual RCBOs also improves circuit separation because a residual-current fault on one protected circuit does not inherently require other independently protected circuits to be disconnected.

Type A Residual Current Protection

This device incorporates Type A RCD functionality with a rated residual operating current of 30mA.

Type A devices are designed to respond to sinusoidal AC residual currents as well as pulsating DC residual currents, making them suitable for many modern electrical circuits containing electronic equipment.

20A B Curve Characteristic

The 20A B Curve characteristic makes this model particularly relevant to lower-current applications where high starting currents are not normally expected.

Typical applications can include lighting and control circuits, subject to the electrical design, connected load, installation method and required protective characteristics.

Compact 1 Module Design

At only 18mm wide, the RCBO occupies a single module within a compatible distribution board.

Its compact construction allows individual RCBO protection to be installed without unnecessarily consuming enclosure space, making it particularly useful where the number of available DIN rail modules is limited.

6kA Short-Circuit Capacity

The device provides a 6kA short-circuit breaking capacity, allowing it to safely interrupt prospective fault currents within its specified rating when correctly selected and installed.

The suitability of the breaking capacity should always be determined according to the prospective fault current at the point of installation.

• Brand: Lewden
• Product Type: Compact RCBO
• Rated Current: 20A
• Trip Curve: B Curve
• RCD Type / Class: Type A
• Residual Current: 30mA
• Short-Circuit Capacity: 6kA
• Pole Configuration: 1P+N
• Rated Operating Voltage: 230V
• Frequency: 50–60Hz
• Mounting: DIN Rail
• Module Width: 1 Module
• Width: 18mm
• Cable Capacity: 1–16mm²
• Dimensions: 95mm (H) × 18mm (W) × 76mm (D)
• Standard: BS EN 61009-1

Dimensions

The compact RCBO measures:

95mm (H) × 18mm (W) × 76mm (D)

The 18mm width corresponds to a standard single-module DIN rail footprint.

Cable Capacity

The terminals accommodate conductors from 1mm² to 16mm², providing flexibility across a range of compatible circuit applications.

Conductor size and type should be selected according to the circuit design, load, installation conditions and applicable wiring requirements.

Typical Applications

The 16A rating and B Curve characteristic make this RCBO particularly suitable for appropriately designed lower-current circuits, including:

• Domestic Lighting Circuits
• Commercial Lighting
• LED Lighting Circuits
• Control Circuits
• Alarm & Signalling Circuits
• Small Auxiliary Circuits
• Consumer Unit Upgrades
• New Residential Installations

Final device selection should always be based on the characteristics and requirements of the individual circuit.

Standards & Compliance

The Lewden compact RCBO is manufactured in accordance with:

BS EN 61009-1 Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses.

Why Choose the Lewden Compact Type A RCBO?

The Lewden 20A 30mA Type A RCBO provides three important forms of circuit protection overload, short circuit and residual current protection within a compact 18mm device.

Its B Curve characteristic, 6kA breaking capacity, Type A residual-current detection and 1P+N configuration make it a practical option for suitably designed modern electrical installations.

The single-module format is particularly beneficial when fitting multiple independently protected circuits into a consumer unit where DIN rail space is valuable.