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WRB120B-030 is a 20A B Curve high immunity Type A mini RCBO designed for general-purpose domestic and commercial circuits. It combines overload, short-circuit, and residual current protection in one compact single-module device, making it ideal where board space is limited.
As part of the Whitecliffe WRB range, this RCBO provides Type A protection, detecting standard AC faults and pulsating DC components. The high immunity design helps reduce nuisance tripping, while the built-in switched neutral provides full isolation of live and neutral conductors on a faulty circuit.
Installer Tip: Choose the 20A B Curve for general-purpose socket and small appliance circuits. Where the circuit has higher startup or inrush demand, a 20A C Curve variant may be more suitable.
Key Features
- 20A rated current – suited to general-purpose circuits
- B Curve tripping – suitable for standard domestic and commercial loads
- Type A protection – detects AC and pulsating DC components
- High immunity design – helps reduce nuisance tripping
- 30mA residual current protection
- 6kA breaking capacity
- 1P+N format – switched live and neutral
- Compact 18mm width – saves space in the board
- Bi-directional operation – suitable for modern PV and EV system layouts
Compare Mini RCBO Variants
| Model | Rated Current | Curve | Type | Width |
|---|---|---|---|---|
| WRB120B-030 (This Product) | 20A | B Curve | Type A, High Immunity | 18mm |
| WRB120C-030 | 20A | C Curve | Type A, High Immunity | 18mm |
