Type A RCBO – 20A C Curve, 30mA
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WRT120C-030 is a 20A C Curve Type A RCBO providing overcurrent and 30mA residual current protection in one compact unit. With switched live and neutral disconnection for full isolation, bi-directional wiring for solar PV and inverter-fed systems, and high immunity electronics to reduce false tripping, it is a dependable...
The WRT120C-030 is a 20A C Curve Type A RCBO providing overcurrent and 30mA residual current protection in one compact unit. With switched live and neutral disconnection for full isolation, bi-directional wiring for solar PV and inverter-fed systems, and high immunity electronics to reduce false tripping, it is a dependable solution for EV chargers, motors, and heat pump circuits.
Compliant with the 18th Edition Wiring Regulations (Amendment 2) and tested to IEC/EN 61009-1, this device is designed for reliable operation in domestic and light commercial installs.
Installer Tip: Choose a C Curve for circuits with high inrush current such as EV chargers, motors, or heat pumps. For domestic socket or lighting circuits with lower inrush demand, select the B Curve model.
Key Features
- 20A C Curve Type A RCBO – overload + residual protection
- Switched live & neutral – safe disconnection of both poles
- High immunity design – reduces nuisance tripping
- Bi-directional wiring – inverter and solar compatible
- Compact 18mm module – standard DIN rail fit
- 10kA breaking capacity – reliable for residential & light commercial use
- Conforms to IEC/EN 61009-1
Compare WRT Range
| Model | Rating | Curve | Application |
|---|---|---|---|
| WRT116C-030 | 16A | C Curve | EV / Heat Pumps |
| WRT120C-030 (This Product) | 20A | C Curve | Motors / EV / Inrush Loads |
| WRT125C-030 | 25A | C Curve | Higher Load EV / Commercial |
| WRT120B-030 | 20A | B Curve | Domestic Circuits |
When should I use a 20A C Curve RCBO?
Best for 20A circuits with high inrush current, such as EV chargers, motors, and heat pumps.
Why choose Type A instead of AC?
Type A RCBOs detect pulsating DC leakage as well as AC faults, which is required for EV and renewable applications.
Does it isolate both poles?
Yes – live and neutral are both disconnected when tripped or switched off.
What does high immunity mean?
It helps prevent nuisance tripping caused by harmonics and surges from inverter-fed equipment.
- Type: A (AC + pulsating DC leakage detection)
- Rating: 20A
- Trip Curve: C
- Sensitivity: 30mA
- Breaking Capacity: 10kA
- Poles: 1P+N (switched live + neutral)
- Voltage: 230V AC
- Impulse Withstand: 4kV
- Electrical Life: 2,000 operations
- Mechanical Life: 10,000 operations
- Protection Degree: IP20
- Terminal Capacity: Top 10mm² / Bottom 16mm²
- Dimensions: W17.8 × H116 × D76mm
- SKU: WRT120C-030
- Standards: IEC/EN 61009-1
Compact RCBO designed for 20A circuits with high inrush currents. Provides combined overload and 30mA earth leakage protection, ideal for EV, heat pumps, and inverter-fed systems.
- DIN rail mounted – single 18mm module
- Check load matches 20A rating
- Bi-directional wiring for flexible installation
- Install only by a qualified electrician
