Professional three-pole 50A circuit breaker with 25kA breaking capacity, D-curve tripping, and IP20 finger-safe protection for reliable electrical circuit control and isolation.
The Legrand DX³ three-pole modular thermal-magnetic circuit breaker is a professional-grade electrical protection device designed for control, protection, and isolation of electrical circuits in residential and small commercial applications. This advanced circuit breaker features a robust 25kA breaking capacity at 400V~ with D-curve tripping characteristics, providing reliable protection against overcurrents and short circuits. The device is specifically engineered for three-phase electrical systems and offers comprehensive safety features including finger-proof IP20 protection, ensuring safe operation in various installation environments.
This circuit breaker incorporates a thermal-magnetic tripping mechanism that responds quickly to fault conditions, with short-circuit tripping thresholds ranging between 500A and 700A following the D-curve standard between 10In and 14In. The device can be supplied by copper cable from either the top or bottom side, offering flexible installation options. It features a red/green mechanical indicator that clearly displays the open or closed status of the contacts, along with a convenient label holder for circuit identification.
The DX³ series is fully compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories, allowing for customized electrical configurations. Built to international standards and compliant with IEC 60947-2, this circuit breaker delivers exceptional reliability and durability. The product is halogen-free and designed through an environmentally conscious manufacturing process, making it an eco-friendly choice for modern electrical installations.
Key Features
- 25kA breaking capacity at 400V~ with D-curve tripping characteristics
- Three-pole thermal-magnetic protection for overcurrent and short-circuit detection
- IP20 finger-safe design compliant with IEC/EN 60529 standard
- Red/green mechanical indicator displaying open/closed contact status
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Flexible top or bottom copper cable supply connection
- Label holder for convenient circuit identification
- Halogen-free and environmentally conscious design
- Rated for 50-60 Hz operation with 500V rated insulation voltage
- DIN rail mounting with 4.5 modular spacing width
Technical Specifications
| Specification |
Value |
| Product Model | DX³ MCB 3 Pole 50A |
| Reference Number | 409838 |
| EAN Code | 3245064098380 |
| Rated Current | 50 A |
| Number of Poles | 3 (three-pole) |
| Release Characteristic | D-curve |
| Breaking Capacity at 400V | 25 kA |
| Breaking Capacity at 230V | 50 kA |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Short-Circuit Tripping Threshold | 500A - 700A (D-curve 10In - 14In) |
| Frequency Range | 50-60 Hz |
| Degree of Protection | IP20 (Finger-safe) |
| Impact Strength Rating | IK02 |
| Connection Type | Screwed terminal with cable connection |
| Supply Direction | Top or bottom connection |
| Connectable Conductor Cross Section (Solid-core) | 1.5 - 50 mm² |
| Connectable Conductor Cross Section (Multi-wired) | 1.5 - 35 mm² |
| Built-in Depth | 47 mm |
| Width | 80.1 mm |
| Height | 127.5 mm |
| Total Depth | 79.2 mm |
| Modular Width Spacing | 4.5 modules |
| Mounting Method | DIN rail |
| Ambient Operating Temperature | -25 to +70 °C |
| Storage Temperature Range | -40 to +70 °C |
| Nominal Voltage Range | 360 - 440 V |
| Pollution Degree | 3 |
| Color | Grey |
| RAL Number | 7035 |
| Halogen Free | Yes |
| Flush-mounted Installation | Yes |
| Additional Equipment Possible | Yes |
| Concurrently Switching Neutral | No |
| Explosion-proof | No |
| Carbon Footprint (Manufacturing) | 5.753 kg CO₂ eq. |
| Standards Compliance | IEC 60947-2, IEC/EN 60529 |
| Warranty | Legrand standard warranty |
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