High Immunity Type A Mini RCBO – 6A B Curve (WRB106B-030)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WRB106B-030 High Immunity Type A Mini RCBO is a compact 6A B Curve device that combines residual current and overcurrent protection in a single 18mm module. Designed for boards where space is limited, it provides 30mA Type A protection, detecting AC and pulsating DC leakage currents to ensure compliance...
The WRB106B-030 High Immunity Type A Mini RCBO is a compact 6A B Curve device that combines residual current and overcurrent protection in a single 18mm module. Designed for boards where space is limited, it provides 30mA Type A protection, detecting AC and pulsating DC leakage currents to ensure compliance with 18th Edition regulations.
Installer Tip: Choose the 6A B Curve version for lighting and small domestic loads. If you’re working on circuits with higher inrush currents, switch to the 6A C Curve variant.
Key Features
- 6A rated current – ideal for lighting and small domestic circuits
- B Curve tripping characteristic – suited to standard residential loads
- Type A sensitivity – detects AC + pulsating DC leakage
- High immunity design – minimises nuisance tripping
- Single-module width (18mm) – saves space in consumer units
- Switched live & neutral – provides full isolation
- Bi-directional – safe for use with PV and EV systems
Compare Mini RCBO Variants
| Model | Rated Current | Curve | Type | Width |
|---|---|---|---|---|
| WRB106B-030 (This Product) | 6A | B Curve | Type A, High Immunity | 18mm |
| WRB106C-030 | 6A | C Curve | Type A, High Immunity | 18mm |
When should I choose a 6A B Curve RCBO?
The 6A B Curve is best for lighting and small domestic loads. If you’re protecting circuits with higher inrush currents (e.g. motors), consider the 6A C Curve.
Why pick a mini single-module RCBO?
The 18mm width saves valuable board space, making it perfect for retrofit upgrades or consumer units with limited ways.
Is this RCBO suitable for EV or PV systems?
Yes. With Type A detection and high immunity design, it provides stable protection for inverter-driven systems.
What does high immunity mean?
High immunity RCBOs are engineered to reduce nuisance tripping caused by harmonics or transient voltages – common in circuits with EV chargers, PV inverters, or modern electronics.
- Product Code: WRB106B-030
- Rated Current: 6A
- Curve: B Curve
- Breaking Capacity: 6kA
- Poles: 1P + switched neutral
- Trip Sensitivity: 30mA
- Earth Leakage Detection: Type A (AC + pulsating DC)
- Module Width: 18mm
- Dimensions: 18 × 90 × 77 mm
- Standards: BS EN 61009-1
Install the WRB106B-030 in a DIN rail consumer unit where compact protection is required. Final installation and testing must be carried out by a qualified electrician.
- Use on lighting or small load circuits rated at 6A
- B curve tripping characteristic – suited to general residential loads
- Switched neutral simplifies insulation resistance testing
- Compatible with EV charger and PV circuits requiring smooth DC detection
