3-Pole Type A RCBO – 40A C Curve 30mA 10kA (WRT340C-030)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WRT340C-030 is a 3-pole Type A RCBO providing combined residual current and overcurrent protection for three-phase circuits rated up to 40A. With a C curve tripping characteristic and 30mA sensitivity, it offers dependable protection against overload, short-circuit, and earth leakage faults in a compact 3-module DIN rail format. Type...
The WRT340C-030 is a 3-pole Type A RCBO providing combined residual current and overcurrent protection for three-phase circuits rated up to 40A. With a C curve tripping characteristic and 30mA sensitivity, it offers dependable protection against overload, short-circuit, and earth leakage faults in a compact 3-module DIN rail format.
Type A residual current protection enables detection of AC residual currents and pulsating DC components, making this RCBO suitable for modern installations containing electronic equipment. The C curve response allows for moderate inrush currents, typically associated with motors, pumps, HVAC equipment, and mixed-load commercial distribution boards.
Installer note: Switched neutral operation disconnects L1, L2, L3, and N together, improving isolation safety and reducing time spent during insulation resistance testing.
- 3-pole Type A RCBO with integrated overcurrent protection
- 40A rated current with C curve characteristic
- 30mA residual current sensitivity
- 10kA short-circuit breaking capacity
- Switched neutral for full disconnection of live conductors
- Compact 3-module DIN rail design
- Clear IN / OUT / LOAD terminal markings
| Part Code | Rating | Curve | Residual Current |
|---|---|---|---|
| WRT340C-030 | 40A | C Curve | 30mA |
| WRT320C-030 | 20A | C Curve | 30mA |
| WRT332B-030 | 32A | B Curve | 30mA |
| WRT332C-030 | 32A | C Curve | 30mA |
| WRT340B-030 | 40A | B Curve | 30mA |
| WRT350C-030 | 50A | C Curve | 30mA |
The WRT340C-030 is well suited to three-phase circuits where Type A protection and tolerance for moderate inrush currents are required at higher operating currents.
What applications suit a C curve RCBO?
C curve RCBOs are commonly used on circuits with moderate inrush currents, such as motors, pumps, HVAC systems, and mixed commercial loads.
Does this RCBO include a switched neutral?
Yes. The neutral is switched, providing full disconnection of all live conductors.
Is this suitable for three-phase commercial installations?
Yes. It is designed for three-phase commercial, industrial, and advanced residential installations.
What is the short-circuit breaking capacity?
The WRT340C-030 has a rated breaking capacity of 10kA.
Is this supplied pre-wired?
No. This RCBO is supplied as a DIN-rail-mounted device and must be wired during installation.
- Device Type: 3-Pole RCBO
- Residual Current Type: Type A
- Rated Current: 40A
- Tripping Curve: C Curve
- Residual Current Sensitivity: 30mA
- Breaking Capacity: 10kA
- Number of Modules: 3
- Neutral: Switched
- Mounting: DIN rail (EN 60715)
- Rated Voltage: 230V AC
- Frequency: 50/60Hz
- Compliance: IEC / EN 61009-1
This RCBO must be installed by a qualified electrician within a three-phase distribution board. Care should be taken to ensure correct termination of supply and load conductors.
- Mount on a standard 35mm DIN rail
- Observe IN / OUT / LOAD markings during installation
- Do not connect incoming supply to load terminals
- Switched neutral enables full isolation during testing
- Confirm C curve suitability for motor or mixed-load circuits
