4-pole 40A thermal-magnetic circuit breaker with 10kA breaking capacity, C curve tripping, IP20 finger-safe design, and DIN rail mounting for reliable electrical protection
The Legrand DX3 MCB (Miniature Circuit Breaker) is a thermal-magnetic circuit breaker designed to protect wiring installations against overloads and short circuits. This 4-pole 40A device features a 10kA breaking capacity at 400V with C curve tripping characteristics, providing reliable protection for residential and small commercial electrical systems. The breaker is IP20 finger-safe rated, ensuring protection against accidental contact with live parts, and features DIN rail mounting for easy installation in distribution panels.
This circuit breaker is equipped with advanced safety features including energy limitation class 3 according to IEC 60898-1 standard, which minimizes let-through energy during fault conditions. The device can be supplied via copper cable, prong busbar, fork busbar, or Legrand HX3 plug busbar connections, offering flexible installation options. It features a label holder for circuit identification and clear on/off indication with red and green backgrounds for easy status recognition.
The DX3 MCB is compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories, making it highly versatile for different installation requirements. Built with halogen-free materials and designed through an environmentally conscious process, it complies with substance-restriction requirements. The device operates reliably in ambient temperatures from -25°C to 70°C and is suitable for both flush-mounted and surface-mounted installations.
Key Features
- 10kA breaking capacity at 400V with C curve tripping characteristics for reliable short-circuit protection
- 4-pole configuration with 40A rated current providing comprehensive electrical circuit protection
- IP20 finger-safe design protecting against accidental contact with live components
- Energy limitation class 3 minimizing let-through energy during fault conditions
- DIN rail mounting with independent removal capability for easy installation and maintenance
- Compatible with Legrand DX3 auxiliaries and RCD add-on modules for enhanced functionality
- Halogen-free construction designed through environmentally conscious manufacturing process
- Clear on/off indication with red and green backgrounds for easy operational status recognition
- Label holder for circuit identification and organized panel management
- Wide operating temperature range from -25°C to 70°C ensuring reliable performance
Technical Specifications
| Specification |
Value |
| Product Type | Miniature Circuit Breaker (MCB) |
| Brand | Legrand |
| Model | DX3 |
| Reference Number | 409340 |
| EAN Code | 3245064093408 |
| Number of Poles | 4 poles |
| Rated Current | 40 A |
| Rated Voltage | 400 V |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 4 kV |
| Breaking Capacity at 400V | 10 kA |
| Breaking Capacity at 230V | 16 kA |
| Ultimate Breaking Capacity at 400V | 16 kA |
| Ultimate Breaking Capacity at 230V | 32 kA |
| Release Characteristic | C curve |
| Tripping Threshold | 200A to 400A (C curve between 5 In and 10 In) |
| Current Limiting Class | Class 3 |
| Degree of Protection | IP20 |
| Degree of Impact Strength | IK02 |
| Voltage Type | AC |
| Frequency Range | 50-60 Hz |
| Pollution Degree | 2 |
| Connectable Conductor Cross Section (Solid-core) | 1.5-35 mm² |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Connection Type | Screwed terminal |
| Mounting Method | DIN rail |
| Width in Modular Spacings | 4 modules |
| Width | 70.8 mm |
| Height | 94.8 mm |
| Depth | 77.8 mm |
| Built-in Depth | 44 mm |
| Color | Grey |
| RAL Number | 7035 |
| Ambient Temperature Operating Range | -25°C to 70°C |
| Storage Temperature Range | -40°C to 70°C |
| Halogen Free | Yes |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral Conductor | Yes |
| Electric Supplying Direction | By the top or bottom |
| Additional Equipment Possible | Yes |
| Label Space | Yes |
| Carbon Footprint (Manufacturing) | 3.757 kg CO2 eq. |
| Compliance Standards | IEC 60898-1, IEC 60947-2, IEC/EN 60529 |
| Warranty | Legrand standard warranty |
Order Legrand DX3 MCB 4P 40A Curve C Circuit Breaker | 409340 at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
