Professional 4-pole circuit breaker with 10A capacity, D-curve protection, 25kA breaking capacity at 400V, compact 4-module design, and IP20 finger-safe terminals for reliable electrical circuit protection
The Legrand DX3 4 Pole 10A Curve D Circuit Breaker is a professional-grade modular thermal-magnetic circuit breaker designed for comprehensive control, protection, and isolation of electrical circuits in residential and small commercial applications. This advanced device delivers exceptional performance with a 25kA breaking capacity at 400V~ and features a D-curve tripping characteristic that provides optimal protection against short circuits with tripping thresholds between 100A and 140A (D curve between 10 In and 14 In). The compact 4-module design with IP20 finger-safe terminals ensures safe installation and operation in various electrical environments.
This circuit breaker combines reliability with user-friendly features including a clear label holder for circuit identification, ON/OFF indication printed on the handle with red and green backgrounds for easy status identification, and DIN rail clamps that allow independent removal while the busbar remains in place. The device can be supplied by copper cable, prong busbar (top or bottom side), fork busbar (bottom side), or Legrand HX3 plug busbar (top side), providing flexible installation options for different electrical configurations.
Built with environmental consciousness, this Legrand DX3 breaker complies with all substance-restriction requirements and features halogen-free construction. It can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and accessories, making it highly adaptable to diverse electrical system requirements. The thermal-magnetic protection mechanism ensures reliable operation across ambient temperatures from -25°C to 70°C, with rated insulation voltage of 500V and impulse withstand voltage of 4kV, guaranteeing long-term durability and safety in demanding electrical applications.
Key Features
- 25kA breaking capacity at 400V with D-curve tripping characteristic
- 4-pole modular thermal-magnetic circuit breaker with 4-module compact design
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm
- DIN rail mounted with independent removal capability while busbar remains in place
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Label holder for clear circuit identification with ON/OFF indication
- Accepts copper cable, prong busbar, fork busbar or Legrand HX3 plug busbar supply
- Halogen-free construction with environmentally conscious design
- Operates reliably from -25°C to 70°C ambient temperature range
- Rated insulation voltage 500V with 4kV impulse withstand voltage
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 10 A |
| Release Characteristic | D-curve (tripping threshold 100A-140A) |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 4 kV |
| Breaking Capacity at 230V | 50 kA (IEC 60947-2) |
| Breaking Capacity at 400V | 25 kA (IEC 60947-2) |
| Frequency | 50-60 Hz |
| Degree of Protection | IP20 (fingerproof, protected against solid bodies >12.5mm) |
| Module Width | 4 modular spacings (70.8 mm) |
| Built-in Depth | 44 mm |
| Overall Dimensions | Width: 70.8 mm, Height: 94.8 mm, Depth: 77.8 mm |
| Degree of Impact Strength | IK02 |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -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 |
| Supply Direction | By top or bottom |
| Mounting Method | DIN rail with independent removal clamps |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Pollution Degree | 3 |
| Nominal Voltage Range | 360-440 V |
| Additional Equipment | Compatible with DX3 auxiliaries, RCD add-on modules |
| Flush-mounted Installation | Yes |
| Concurrent Switching of Neutral | Yes |
| Reference Number | 409845 |
| EAN Code | 3245064098458 |
| Carbon Footprint (Manufacturing) | 3.578 kg CO₂ eq. |
| Warranty | Manufacturer warranty with Legrand approved repair and service |
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