Legrand DX3 thermal-magnetic circuit breaker, 2-pole 50A with 6kA breaking capacity, curve C, for reliable protection against overloads and short circuits in residential and small commercial installations.
The Legrand DX3 MCB 407805 is a thermal-magnetic circuit breaker designed to protect wiring installations against overloads and short circuits. With a breaking capacity of 6000A according to IEC 60898-1 standard, this 2-pole device is rated at 50A with curve C characteristics, providing a tripping threshold between 250A and 500A for short-circuit protection. The breaker can be supplied via copper cable, prong busbar (top or bottom side), fork busbar (bottom side), or Legrand HX3 plug busbar (top side), making it highly versatile for various installation configurations.
This circuit breaker features advanced protection mechanisms including IP20 degree of protection against solid bodies larger than 12.5mm (fingerproof design) and energy limitation class 3 according to IEC 60898-1 standard, ensuring maximum safety. The device is equipped with two independent DIN rail clamps (top and bottom) allowing easy removal without disturbing the busbar supply. It can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories, and supports connection to aluminum cables with appropriate terminal accessories.
The product is environmentally conscious with halogen-free construction and complies with all substance-restriction requirements. Operating at 400V rated voltage with 500V insulation voltage and 4kV impulse withstand voltage, it functions reliably across 50-60 Hz frequency range and ambient temperatures from -25°C to 70°C. The grey-colored breaker (RAL 7035) includes a label holder for circuit identification and clear ON/OFF indication on the handle for easy status recognition.
Key Features
- 6000A breaking capacity according to IEC 60898-1 standard for household installations
- Thermal-magnetic protection with C curve tripping threshold between 250A and 500A
- IP20 fingerproof design protecting against solid bodies larger than 12.5mm
- Energy limitation class 3 for maximum protection and safety
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Independent DIN rail clamps for easy removal without disturbing busbar supply
- Halogen-free construction with environmentally conscious design
- Clear ON/OFF indication on handle with red and green background identification
- Label holder for convenient circuit identification
- Supports multiple supply methods including copper cable and various busbar types
Technical Specifications
| Specification |
Value |
| Product Type | Thermal-Magnetic Circuit Breaker (MCB) |
| Number of Poles | 2 poles (2P) |
| Rated Current | 50 A |
| Rated Voltage | 400 V AC |
| Insulation Voltage | 500 V |
| Impulse Withstand Voltage | 4 kV |
| Breaking Capacity (Icn) | 6 kA at 400V according to EN 60898-1 |
| Breaking Capacity (Icu) | 10 kA at 400V according to IEC 60947-2 |
| Trip Characteristic | Curve C (5-10 In) |
| Current Limiting Class | Class 3 |
| Frequency Range | 50-60 Hz |
| Degree of Protection | IP20 |
| Impact Strength | IK02 |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Width | 35.4 mm (2 modular spacings) |
| Height | 94.8 mm |
| Depth | 77.8 mm |
| Built-in Depth | 44 mm |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Connectable Conductor Cross Section (Solid-core) | 1.5-35 mm² |
| Connection Type | Screwed Terminal |
| Mounting Method | DIN Rail |
| Color | Grey (RAL 7035) |
| Halogen Free | Yes |
| Pollution Degree | 2 |
| Supply Direction | By top or bottom |
| Neutral Conductor Switching | No |
| Additional Equipment | Yes (RCD add-on modules and auxiliaries) |
| Product Reference | 407805 |
| EAN Code | 3245064078054 |
| Carbon Footprint (Manufacturing) | 1.908 kg CO2 eq. |
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