Thermal magnetic 2-pole 40A circuit-breaker with D-curve protection, 16kA breaking capacity at 230V, IP20 finger-safe design, DIN-rail mounting, and environmental compliance for residential and small commercial installations.
The Legrand DX3 MCB 2P 40A D-Curve is a thermal magnetic circuit-breaker designed to protect wiring installations against overloads and short-circuits. This high-performance device features a 2-pole configuration with 40A rated current and D-curve release characteristic, providing 16kA breaking capacity at 230V and 10kA at 400V. The MCB is equipped with IP20 finger-safe protection, ensuring safety in household and small commercial installations. With DIN-rail mounting capability and screwed terminal connections, this circuit-breaker offers flexible installation options for copper and aluminium conductors.
This device combines advanced protection technology with user-friendly design features. The label holder allows clear circuit identification, while the on/off indication printed on the handle in red and green backgrounds enables easy status recognition. The MCB can be supplied by copper cable, prong busbar, fork busbar, or Legrand HX3 plug busbar, making it compatible with various electrical systems. Built with halogen-free materials and designed in an environmentally conscious process, it complies with substance-restriction requirements and industry standards including IEC 60898-1.
The DX3 MCB features independent removal capability thanks to dual DIN rail clamps positioned on both top and bottom sides, allowing convenient maintenance without affecting the entire row. It operates reliably across a wide ambient temperature range (-25°C to +70°C) and includes the ability to be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for enhanced functionality and system integration.
Key Features
- Thermal magnetic protection with D-curve release characteristic for optimal overload and short-circuit protection
- 16kA breaking capacity at 230V and 10kA at 400V according to IEC 60898-1 standard for household installations
- IP20 finger-safe protection preventing contact with live parts larger than 12.5mm
- Independent removal capability with dual DIN rail clamps allowing maintenance without affecting the entire circuit row
- Label holder and on/off indication with red and green background markings for easy circuit identification and status recognition
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for system expansion
- Flexible supply options including copper cable, prong busbar, fork busbar, or Legrand HX3 plug busbar connections
- Halogen-free construction and environmentally conscious design complying with substance-restriction requirements
- Wide operating temperature range from -25°C to +70°C with reliable performance stability
- Screwed terminal connections supporting both solid-core (1.5-35mm²) and multi-wired (1.5-25mm²) conductors
Technical Specifications
| Specification |
Value |
| Product Name | MCB DX3 10000A 2 Pole 40A Curve D |
| Reference Number | 409455 |
| EAN Code | 3414970434296 |
| Manufacturer | Legrand |
| Product Series | DX3 |
| Number of Poles | 2 (2P) |
| Rated Current | 40 A |
| Release Characteristic | D-Curve |
| Rated Voltage | 400 V |
| Rated Insulation Voltage (Ui) | 500 V |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV |
| Breaking Capacity at 230V (Icn) | 16 kA |
| Breaking Capacity at 400V (Icn) | 10 kA |
| Ultimate Breaking Capacity at 230V (Icu) | 32 kA |
| Ultimate Breaking Capacity at 400V (Icu) | 16 kA |
| Short-Circuit Tripping Threshold | 400A to 560A (D curve between 10In and 14In) |
| Frequency | 50-60 Hz |
| Voltage Type | AC |
| Degree of Protection | IP20 (Finger-safe) |
| Width in Modular Spacings | 2 |
| Built-in Depth | 44 mm |
| Width | 35.4 mm |
| Height | 94.8 mm |
| Depth | 77.8 mm |
| Degree of Impact Strength | IK02 |
| Connection Type | Screwed Terminal |
| Connectable Conductor Cross Section (Solid-core) | 1.5-35 mm² |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Mounting Method | DIN Rail |
| Electric Supplying Direction | By the top or bottom |
| Ambient Temperature Operating Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Pollution Degree | 2 |
| Colour | Grey |
| RAL Number | 7035 |
| Halogen Free | Yes |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral Conductor | No |
| Additional Equipment Possible | Yes |
| Explosion-proof | No |
| Label Space/Information Surface | Yes |
| Carbon Footprint (Manufacturing) | 1.897 kg CO2 eq. |
| Compliance Standards | IEC 60898-1, IEC/EN 60529, IEC 60947-2, RoHS Directive, REACH |
Order Legrand DX3 MCB 2P 40A D-Curve Circuit Breaker | 409455 at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
