Type A RCBO – 40A C Curve, 30mA
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WRT140C-030 is a 40A C Curve Type A RCBO designed for circuits with high inrush current, such as EV chargers, motors, and heat pumps. It provides both overcurrent and 30mA residual current protection in a single device, with switched live and neutral disconnection for full circuit isolation, bi-directional wiring...
The WRT140C-030 is a 40A C Curve Type A RCBO designed for circuits with high inrush current, such as EV chargers, motors, and heat pumps. It provides both overcurrent and 30mA residual current protection in a single device, with switched live and neutral disconnection for full circuit isolation, bi-directional wiring for flexible installs, and high immunity electronics to reduce nuisance trips in demanding environments.
Tested to IEC/EN 61009-1 and compliant with the 18th Edition Wiring Regulations (Amendment 2), this 40A RCBO is a robust choice for domestic and commercial boards where reliability and compliance are critical.
Installer Tip: Select a C Curve when protecting circuits with high start-up demand, such as EV charge points or heat pump systems. For domestic socket or lighting circuits, the B Curve is generally more suitable.
Key Features
- 40A C Curve Type A RCBO – overload + residual current protection
- Switched live & neutral – ensures safe isolation of both poles
- High immunity design – resists nuisance tripping
- Bi-directional wiring – inverter and renewable ready
- Compact 18mm module – saves space in consumer units
- 10kA breaking capacity – built for residential & commercial installs
- Meets IEC/EN 61009-1 standards
Compare WRT Range
| Model | Rating | Curve | Application |
|---|---|---|---|
| WRT132C-030 | 32A | C Curve | General Loads / Inverter Systems |
| WRT140C-030 (This Product) | 40A | C Curve | EV / Motors / Heat Pumps |
| WRT150C-030 | 50A | C Curve | High Load / Commercial |
| WRT140B-030 | 40A | B Curve | Domestic / Standard Loads |
When should I use a 40A C Curve RCBO?
Best for circuits with high inrush demand, such as EV chargers, heat pumps, or motor-driven systems.
Why Type A over AC?
Type A RCBOs detect both AC and pulsating DC leakage, making them essential for renewable and EV applications.
Does it disconnect both poles?
Yes – switched live and neutral ensure both conductors are safely isolated.
How does high immunity help?
It prevents nuisance trips caused by harmonics or switching surges in inverter-fed systems.
- Type: A (AC + pulsating DC leakage detection)
- Rating: 40A
- 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: WRT140C-030
- Standards: IEC/EN 61009-1
Compact RCBO for 40A circuits with high inrush current. Suitable for EV charge points, motors, and renewable installs, providing both overload and residual current protection.
- DIN rail mount – single 18mm module
- Ensure 40A rating suits circuit demand
- Bi-directional wiring simplifies connection
- Installation must be carried out by a qualified electrician
