Type A RCBO – 50A B Curve, 30mA
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WRT150B-030 is a 50A B Curve Type A RCBO designed for high load domestic and commercial circuits. It combines overcurrent and 30mA residual current protection in a compact single-module device, with switched live and neutral disconnection for full isolation and bi-directional wiring for solar PV, EV, and inverter-fed systems....
The WRT150B-030 is a 50A B Curve Type A RCBO designed for high load domestic and commercial circuits. It combines overcurrent and 30mA residual current protection in a compact single-module device, with switched live and neutral disconnection for full isolation and bi-directional wiring for solar PV, EV, and inverter-fed systems.
With high immunity electronics to minimise nuisance trips, this RCBO ensures compliance with the 18th Edition Wiring Regulations (Amendment 2) and is tested to IEC/EN 61009-1 standards for safety and durability.
Installer Tip: Use the B Curve for heavy-duty circuits where low inrush currents are expected. For EV, motors, or equipment with high inrush demand, select the C Curve version.
Key Features
- 50A B Curve Type A RCBO – overload + earth leakage protection
- Switched live & neutral – full disconnection of both conductors
- High immunity design – prevents nuisance tripping
- Bi-directional wiring – ideal for inverter and renewable circuits
- Compact single-module – 18mm DIN rail fit
- 10kA breaking capacity – robust for high load installs
- Conforms to IEC/EN 61009-1
Compare WRT Range
| Model | Rating | Curve | Application |
|---|---|---|---|
| WRT140B-030 | 40A | B Curve | Domestic / Commercial Loads |
| WRT150B-030 (This Product) | 50A | B Curve | High Load Circuits |
| WRT150C-030 | 50A | C Curve | EV / Motors / Inrush Loads |
When is a 50A RCBO required?
It’s used in heavy-duty circuits requiring 50A overload protection with earth leakage safety, common in commercial installs.
Why choose a Type A RCBO?
Type A RCBOs detect both AC and pulsating DC leakage, making them essential for EV, solar PV, and modern electronics.
Does it fully isolate the circuit?
Yes – the switched live and neutral design ensures full disconnection for compliance and safety.
What is the benefit of high immunity?
It reduces nuisance trips from harmonics and transients in inverter-heavy environments.
- Type: A (AC + pulsating DC detection)
- Rating: 50A
- Trip Curve: B
- 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: WRT150B-030
- Standards: IEC/EN 61009-1
Built for higher demand circuits requiring 50A protection with residual current safety. Suitable for heavy-duty domestic or commercial installs including renewables and EV-ready boards.
- Single-module DIN rail mount (18mm)
- Confirm 50A rating matches circuit load
- Bi-directional wiring allows flexible line/load installation
- Must be installed by a qualified electrician
