Professional-grade 4-pole 50A circuit breaker with 36kA breaking capacity, C curve protection, IP20 safety terminals, and visible breaking indicator for reliable electrical circuit protection and isolation.
The Legrand DX3 MCB is a four-pole modular thermal-magnetic circuit breaker designed for control, protection, and isolation of electrical circuits in residential and small commercial applications. This high-performance device features a 36kA breaking capacity at 400V~ with C curve tripping characteristics, making it ideal for protecting circuits against overloads and short circuits. The circuit breaker is equipped with IP20 finger-safe terminals for enhanced safety and a visible breaking mechanism for clear status indication.
This versatile circuit breaker can be supplied by copper cable from either the top or bottom, providing flexible installation options. It complies with IEC 60947-2 standards and offers a tripping threshold between 250A and 500A for short-circuit protection. The device features a red/green mechanical indicator that clearly displays whether the contacts are open or closed, and includes a label holder for convenient circuit identification. The DX3 can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for extended functionality.
With a rated current of 50A and rated voltage of 400V, this circuit breaker is built to international standards with halogen-free materials and environmentally conscious design. It operates reliably across a wide ambient temperature range from -25°C to 70°C and features a 6-module width for standard DIN rail mounting. The device is rated for 50-60Hz frequency operation and includes screwed terminal connections suitable for both solid-core (1.5-50mm²) and multi-wired (1.5-35mm²) conductors.
Key Features
- 36kA breaking capacity at 400V with C curve tripping characteristics for superior short-circuit protection
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm for enhanced user safety
- Visible breaking mechanism with red/green mechanical indicator for clear open/closed status display
- Flexible installation with top or bottom copper cable supply and 6-module DIN rail mounting
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and comprehensive accessory range
- Halogen-free environmentally conscious design meeting international sustainability standards
- Wide operating temperature range from -25°C to 70°C for reliable performance in diverse environments
- Integrated label holder for convenient circuit identification and clear documentation
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4P) |
| Rated Current | 50 Amperes |
| Rated Voltage | 400V AC |
| Breaking Capacity at 400V | 36 kA according to IEC 60947-2 |
| Breaking Capacity at 230V | 72 kA according to IEC 60947-2 |
| Tripping Characteristic | C Curve (250A-500A short-circuit threshold) |
| Rated Insulation Voltage | 500V |
| Impulse Withstand Voltage | 6 kV |
| Degree of Protection | IP20 (Finger-safe) |
| Impact Strength Rating | IK02 |
| Built-in Depth | 47 mm |
| Module Width | 6 modular spacings (106.8 mm) |
| Height | 127.5 mm |
| Total Depth | 79.2 mm |
| Connection Type | Screwed terminal with cable connections |
| Conductor Cross Section (Solid-core) | 1.5-50 mm² |
| Conductor Cross Section (Multi-wired) | 1.5-35 mm² |
| Supply Direction | Top or bottom |
| Frequency | 50-60 Hz |
| Nominal Voltage Range | 360-440V |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Mounting Method | DIN rail |
| Pollution Degree | 3 |
| Neutral Conductor Switching | Concurrently switching |
| Additional Equipment | Compatible with DX3 auxiliaries and RCD modules |
| Colour | Grey (RAL 7035) |
| Material Composition | Halogen-free |
| Reference Number | 410039 |
| EAN Code | 3245064100397 |
| Carbon Footprint (Manufacturing) | 6.993 kg CO2 eq. |
| Flush-mounted Installation | Yes |
| Label Holder | Yes |
| Status Indicator | Red/Green mechanical indicator |
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