Professional 4-pole 25A modular circuit breaker with 25kA breaking capacity, C-curve protection, IP20 terminals, and full compatibility with Legrand DX3 system accessories for reliable electrical circuit management.
The Legrand DX3 4-Pole 25A Curve C circuit breaker is a professional-grade modular thermal-magnetic protection device designed for comprehensive control, protection, and isolation of electrical circuits. This advanced MCB features a fully visible breaking mechanism with an impressive 25kA breaking capacity at 400V AC, making it ideal for residential and small commercial electrical installations. The device incorporates C curve tripping characteristics (5-10 times rated current) for optimal protection against short circuits, with a tripping threshold between 125A and 250A.
This circuit breaker is equipped with IP20 terminals providing protection against solid bodies larger than 12.5mm (fingerproof protection), ensuring safe operation in various environments. The DX3 is fully compatible with Legrand's extensive range of auxiliary modules, RCD add-on modules, and accessories, allowing for flexible system expansion and customization. With its DIN rail mounting system featuring independent top and bottom clamps, the device can be easily removed without disrupting the main busbar supply, facilitating maintenance and troubleshooting.
The MCB supports multiple supply methods including copper cables, prong busbars, fork busbars, and Legrand HX3 plug busbars, offering installation flexibility. Built with halogen-free materials and designed through environmentally conscious processes, this circuit breaker meets modern sustainability standards. The product includes a convenient label holder for circuit identification and clear ON/OFF indication printed on the handle with red and green backgrounds for easy status recognition.
Key Features
- 25kA breaking capacity at 400V AC with C-curve tripping characteristic
- Four-pole thermal-magnetic protection with fully visible breaking mechanism
- IP20 terminals providing fingerproof protection against solid bodies larger than 12.5mm
- Compatible with Legrand DX3 auxiliary modules, RCD add-ons, and complete accessory range
- Independent DIN rail mounting with top and bottom clamps for easy removal without busbar disruption
- Multiple supply options including copper cables, prong busbars, fork busbars, and Legrand HX3 plug busbars
- Halogen-free construction with environmentally conscious design
- Clear circuit identification with label holder and ON/OFF indication on handle
- Rated voltage 400V AC with 50-60 Hz frequency operation
- Connectable to aluminum cables with optional terminal accessory
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 25 Amperes |
| Rated Voltage | 400V AC |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 4 kV |
| Breaking Capacity at 230V | 50 kA |
| Breaking Capacity at 400V | 25 kA |
| Tripping Characteristic | C curve (5-10 times rated current) |
| Tripping Threshold | 125A to 250A |
| Degree of Protection | IP20 (fingerproof) |
| Frequency | 50-60 Hz |
| Built-in Depth | 44 mm |
| Width | 70.8 mm |
| Height | 94.8 mm |
| Depth | 77.8 mm |
| Modular Width | 4 DIN rail spacings |
| Degree of Impact Strength | IK02 |
| Ambient Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +70°C |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Connectable Conductor Cross Section (Solid-core) | 1.5-35 mm² |
| Connection Type | Screwed terminal, Busbar, and Cable |
| Mounting Method | DIN Rail |
| Supply Direction | Top or Bottom |
| Neutral Conductor Switching | Concurrently switching |
| Pollution Degree | 3 |
| Nominal Voltage Range | 360-440V |
| Color | Grey (RAL 7035) |
| Halogen Free | Yes |
| Explosion-proof | No |
| Flush-mounted Installation | Yes |
| Additional Equipment Possible | Yes |
| Label Space Available | Yes |
| Reference Number | 409796 |
| EAN Code | 3245064097963 |
| Carbon Footprint (Manufacturing) | 3.727 kg CO₂ eq. |
| Warranty | Legrand Standard Warranty |
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