Professional 4-pole thermal-magnetic circuit breaker with 25kA breaking capacity, D-curve protection, IP20 finger-safe terminals, and flexible DIN rail mounting for reliable electrical circuit protection
The Legrand DX3 4-pole modular thermal-magnetic circuit breaker (MCB) is a professional-grade electrical protection device designed for comprehensive circuit protection and isolation in residential and small commercial applications. This advanced circuit breaker features a 25kA breaking capacity at 400V AC, making it suitable for demanding electrical installations. With its D-curve tripping characteristic, the device provides reliable protection against short circuits with a tripping threshold between 20A and 28A (D curve between 10 In and 14 In), ensuring optimal performance in circuits requiring higher inrush currents.
The DX3 MCB is engineered with IP20 finger-safe terminals that protect against solid bodies larger than 12.5mm, meeting IEC/EN 60529 standards. The circuit breaker offers flexible supply options including copper cable, prong busbar (top or bottom side), fork busbar (bottom side), or Legrand HX3 plug busbar (top side) connections. Its modular design allows installation on standard DIN rails with independent removal capability thanks to dual DIN rail clamps positioned on both top and bottom sides, enabling maintenance without disrupting the main busbar supply.
This environmentally conscious product complies with substance-restriction requirements and is fully compatible with Legrand DX3 auxiliaries, RCD add-on modules, and accessories. The device features a convenient label holder for clear circuit identification and includes ON/OFF indication printed on the handle with red and green backgrounds for easy status recognition. Built with halogen-free materials and rated for ambient operating temperatures from -25°C to 70°C, this circuit breaker delivers reliable, safe electrical protection for modern installations.
Key Features
- 25kA breaking capacity at 400V AC with IEC 60947-2 compliance for superior short-circuit protection
- D-curve tripping characteristic with 20A-28A threshold for optimal performance in high inrush current applications
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm per IEC/EN 60529 standards
- Flexible supply options including copper cable, prong busbar, fork busbar, and Legrand HX3 plug busbar connections
- Independent DIN rail removal with dual top and bottom clamps enabling maintenance without main busbar disruption
- 4-pole configuration with concurrent neutral conductor switching for comprehensive circuit protection
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and comprehensive accessory range
- Convenient label holder with ON/OFF status indication in red and green for easy circuit identification
- Halogen-free, environmentally conscious design complying with substance-restriction requirements
- Operating temperature range -25°C to 70°C with 50-60Hz frequency support for global applications
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker (MCB) |
| Number of Poles | 4 poles (4P) |
| Rated Current | 2 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 | D-curve (20A-28A threshold) |
| Short-Circuit Tripping Range | Between 10 In and 14 In |
| Protection Degree | IP20 (Finger-safe) |
| Impact Strength Rating | IK02 |
| Frequency Support | 50-60 Hz |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440V |
| Width (Modular Spacings) | 4 modules |
| Width Dimension | 70.8 mm |
| Height Dimension | 94.8 mm |
| Depth Dimension | 77.8 mm (Built-in depth: 44 mm) |
| Multi-wired Conductor Cross-Section | 1.5-25 mm² |
| Solid-core Conductor Cross-Section | 1.5-35 mm² |
| Connection Types | Screwed terminal, Busbar, and Cable |
| Supply Direction | Top or bottom |
| Installation Method | DIN rail mounting |
| Mounting Configuration | Dual DIN rail clamps (top and bottom) |
| Flush-mounted Installation | Yes |
| Concurrent Neutral Switching | Yes |
| Pollution Degree | 3 |
| Additional Equipment Possible | Yes - Auxiliaries, RCD modules, and accessories |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Explosion-proof | No |
| Label Space | Yes |
| Terminal Marking Indication | No |
| Carbon Footprint (Manufacturing) | 3.988 kg CO2 eq. |
| Product Reference | 409843 |
| EAN Code | 3245064098434 |
| Brand | Legrand |
| Series | DX³ |
| Compliance Standards | IEC 60947-2, IEC/EN 60529, RoHS Directive, REACH |
Order Legrand DX3 4P 2A Curve D Circuit Breaker MCB | 409843 at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
