Three-Phase Protection in One Modular Device
The DELIXI CDB6LESi 3P RCBO combines overcurrent and residual-current protection for three-phase electrical circuits.
Its three mechanically linked poles switch together, allowing one device to protect all three phase conductors against overload and short-circuit conditions. The integrated residual-current function also monitors leakage imbalance and trips when the specified threshold is reached.
The C40 version shown here is rated for 400V three-phase systems, with 40A rated current, 30mA residual-current sensitivity and 6kA breaking capacity.
A 3P Configuration Without a Neutral Pole
This model is marked 3P and provides three protected phase poles. It should not be confused with:
- 3P+N RCBOs
- Four-pole RCBOs
- Three-pole MCBs without residual-current protection
- Single-phase 1P+N versions from the same series
The correct configuration depends on whether the electrical design requires the neutral conductor to be switched or monitored through a dedicated pole. For quotation and order matching, buyers can provide the panel schedule, single-line diagram or an existing breaker reference.
Designed for 400V Three-Phase Circuits
This configuration may be used in three-phase distribution and equipment circuits such as:
- Small machinery supply circuits
- Pump and water-treatment panels
- Ventilation and HVAC equipment
- Workshop and commercial distribution boards
- Three-phase fixed equipment
- Control and power-distribution enclosures
- Industrial or agricultural electrical panels
- Three-phase branch circuits requiring residual-current protection
Final suitability depends on the connected equipment, starting current, cable selection, upstream protection and local electrical requirements.
Front Operation and Fault Identification
The three red operating handles are mechanically linked for simultaneous operation. The front panel also includes:
- A yellow test button for checking the residual-current mechanism
- A separate reset button for residual-current trips
- Contact-status indication windows
- A printed circuit diagram
- Clearly marked line and load terminals
When the residual-current mechanism operates, the reset button provides a visual and mechanical indication that distinguishes the event from a standard overcurrent trip.
Reference Specification
| Brand | DELIXI ELECTRIC |
|---|---|
| Series | CDB6LESi |
| Product Type | RCBO |
| Pole Configuration | 3P |
| Neutral Pole | Not included |
| Rated Current | 40A |
| Tripping Curve | C curve |
| Instantaneous Trip Range | 5–10 × In |
| Rated Voltage | 400VAC |
| Rated Frequency | 50/60Hz |
| Rated Breaking Capacity | 6kA |
| Rated Residual Operating Current | 30mA |
| Residual-current Type | Type AC |
| Residual Operating Time | ≤0.1s |
| Rated Residual Making and Breaking Capacity | 630A |
| Protection Technology | Thermal-magnetic and residual-current protection |
| Protection Functions | Overload, short circuit and residual current |
| Isolation Function | Yes for the 3P configuration |
| Cable Entry | Top supply |
| Maximum Terminal Capacity | Up to 25mm² series reference |
| Reference Tightening Torque | 2.5N·m for 40–63A series |
| Mounting | 35mm DIN rail |
| Front Controls | Linked handle, test button and reset button |
| Status Indication | Contact and residual-trip indication |
Product-specific ratings are based on the photographed reference unit. Terminal, installation and series data should be reconfirmed against the approved product documentation and supply batch.
Model Matching for Three-Phase Orders
For three-phase protective devices, matching only the brand and current rating is not sufficient.
The order should identify:
- 3P, 3P+N or 4P configuration
- Rated voltage
- Rated current
- Tripping curve
- Residual-current sensitivity
- Residual-current type
- Breaking capacity
- Required standards or certificates
The reference product on this page should be described as: CDB6LESi / 3P / C40 / 400V / 30mA / Type AC / 6kA
This full description helps prevent a 3P RCBO from being replaced with a visually similar three-pole MCB or a breaker with a different neutral arrangement.
Support for Panel and Equipment BOMs
Three-phase breakers are often purchased as part of a wider panel or equipment list rather than as an isolated item.
JXNUO can work from a buyer’s BOM, panel schedule or model list and coordinate products such as:
- Three-phase RCBOs and MCBs
- 1P+N protective devices
- Contactors and overload relays
- Isolators and control switches
- Timers and auxiliary relays
- Distribution enclosures
- Other low-voltage electrical components
Different models can be checked, separated and consolidated under one China-side sourcing arrangement.
JXNUO Order Verification
For this product, JXNUO can coordinate checks covering:
- DELIXI brand and CDB6LESi series markings
- 3P pole configuration
- C40 current rating
- 400V voltage marking
- 30mA residual-current marking
- Type AC symbol
- 6kA breaking-capacity marking
- Linked handle operation
- Test and reset button condition
- Three-phase terminal arrangement
- Product quantity and batch consistency
- Individual and outer-carton packaging
- Available certificates and manufacturer documents
The purpose is to match the supplied breaker to the buyer’s actual three-phase specification rather than accepting a similar-looking alternative.
Send Us Your Three-Phase Product List
Provide the required model, pole configuration, current rating, residual-current sensitivity, quantity and destination market.
For panel projects, buyers may also send the complete BOM or single-line diagram for model matching and consolidated sourcing.
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