High Immunity Type A Mini RCBO – 10A B Curve (WRB110B-030)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WRB110B-030 High Immunity Type A Mini RCBO is a compact 10A B Curve protective device designed for domestic and commercial boards where space is limited. At just 18mm wide, it combines residual current and overcurrent protection in one module. With 30mA Type A sensitivity, it detects AC and pulsating...
The WRB110B-030 High Immunity Type A Mini RCBO is a compact 10A B Curve protective device designed for domestic and commercial boards where space is limited. At just 18mm wide, it combines residual current and overcurrent protection in one module. With 30mA Type A sensitivity, it detects AC and pulsating DC leakage currents – keeping circuits compliant with 18th Edition regulations, including EV chargers and renewable installs.
Installer Tip: Use the 10A B Curve for socket circuits or small appliance loads. For higher inrush current circuits, compare with the 10A C Curve version.
Key Features
- 10A rated current – ideal for sockets and small appliance loads
- B Curve tripping characteristic – designed for general residential use
- Type A sensitivity – detects AC + pulsating DC leakage
- High immunity design – reduces nuisance tripping
- Compact 18mm width – frees up ways in consumer units
- Switched live & neutral – ensures full circuit isolation
- Bi-directional – suitable for PV and EV installs
Compare Mini RCBO Variants
| Model | Rated Current | Curve | Type | Width |
|---|---|---|---|---|
| WRB110B-030 (This Product) | 10A | B Curve | Type A, High Immunity | 18mm |
| WRB110C-030 | 10A | C Curve | Type A, High Immunity | 18mm |
What loads should a 10A B Curve RCBO protect?
It’s most commonly used for socket outlets and small appliances in residential and light commercial circuits.
Is this RCBO compatible with EV chargers?
Yes. As a Type A device with high immunity, it’s suitable for EV chargers and other inverter-driven loads.
Why choose the B Curve over the C Curve?
B Curve is optimised for general domestic use. If you’re dealing with motors, tools, or circuits with higher inrush currents, the 10A C Curve is better suited.
Does it fully isolate the circuit?
Yes – both live and neutral are switched, providing full disconnection during faults.
- Product Code: WRB110B-030
- Rated Current: 10A
- 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
The WRB110B-030 Mini RCBO fits standard DIN rail consumer units and distribution boards. Installation must be completed by a qualified electrician.
- Best suited for 10A socket circuits or small load applications
- B curve tripping – tuned for general residential loads
- Compact single-module design saves space in crowded boards
- Switched neutral simplifies insulation resistance testing
- Compatible with circuits requiring Type A DC detection
