High Immunity Type A Mini RCBO – 20A C Curve (WRB120C-030)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WRB120C-030 High Immunity Type A Mini RCBO is a 20A C Curve protective device designed for circuits with higher inrush currents. Compact at just 18mm wide, it combines short-circuit, overload, and residual current protection in one unit. With 30mA Type A sensitivity and high immunity performance, it’s ideal for...
The WRB120C-030 High Immunity Type A Mini RCBO is a 20A C Curve protective device designed for circuits with higher inrush currents. Compact at just 18mm wide, it combines short-circuit, overload, and residual current protection in one unit. With 30mA Type A sensitivity and high immunity performance, it’s ideal for EV chargers, pumps, small motors, and commercial appliances where nuisance tripping needs to be avoided.
Installer Tip: Choose the 20A C Curve when circuits involve pumps, motors, or EV chargers with high start-up currents. For standard domestic sockets and lighting, see the 20A B Curve variant.
Key Features
- 20A rated current – protects medium-load circuits
- C Curve tripping – handles higher inrush currents
- Type A sensitivity – detects AC + pulsating DC leakage
- High immunity design – prevents nuisance trips
- 18mm single-module width – saves space in consumer units
- Switched live & neutral – full circuit isolation
- Bi-directional – suitable for PV and EV applications
Compare Mini RCBO Variants
| Model | Rated Current | Curve | Type | Width |
|---|---|---|---|---|
| WRB120B-030 | 20A | B Curve | Type A, High Immunity | 18mm |
| WRB120C-030 (This Product) | 20A | C Curve | Type A, High Immunity | 18mm |
What is the WRB120C-030 best used for?
It’s ideal for 20A circuits with equipment that generates high inrush currents – such as pumps, motors, or EV chargers.
How does C Curve differ from B Curve?
C Curve devices tolerate higher inrush currents before tripping, whereas B Curve is designed for standard domestic loads.
Can this RCBO be used for renewable circuits?
Yes. Its Type A detection and high immunity make it safe for PV and EV applications.
Does it fully isolate the circuit?
Yes – both live and neutral conductors are switched for full disconnection under fault.
- Product Code: WRB120C-030
- Rated Current: 20A
- Curve: C 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 WRB120C-030 fits standard DIN rail consumer units and compact distribution boards where circuits demand higher inrush tolerance. Installation and testing must be completed by a qualified electrician.
- Best for EV chargers, pumps, and motor-driven circuits up to 20A
- C Curve – ideal for inrush-heavy equipment
- Compact 18mm width – efficient for retrofit boards
- Switched neutral for safer testing and isolation
- Complies with 18th Edition standards
