Professional 4-pole 50A circuit breaker with 25kA breaking capacity, D-curve tripping, IP20 terminals, and fully visible breaking mechanism for reliable electrical circuit protection
The Legrand DX3 4 Pole 50A Curve D Circuit Breaker is a modular thermal-magnetic circuit breaker designed for comprehensive control, protection, and isolation of electrical circuits. This professional-grade device features a 25kA breaking capacity at 400V with D-curve tripping characteristics, making it ideal for residential and small commercial panel installations. The breaker incorporates fully visible breaking technology with a red/green mechanical indicator that clearly displays the status of the contacts, whether open or closed.
This four-pole circuit breaker is engineered with IP20 finger-safe terminals, providing enhanced safety in electrical installations. The device can be supplied by copper cable from either the top or bottom, offering installation flexibility. With a rated voltage of 400V and insulation voltage of 500V, it delivers reliable performance across standard electrical systems. The D-curve tripping characteristic provides a tripping threshold between 500A and 700A for short-circuit protection, ensuring optimal circuit safety.
The DX3 breaker is fully compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories, allowing for system customization and expansion. Built with halogen-free materials and designed through an environmentally conscious process, this circuit breaker meets all substance-restriction requirements. Its 6-module width on DIN rail mounting and grey RAL7035 color finish make it a standard choice for modern electrical panels.
Key Features
- 25kA breaking capacity at 400V with D-curve tripping characteristic
- Four-pole thermal-magnetic protection with fully visible breaking mechanism
- IP20 finger-safe terminals for enhanced electrical safety
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Red/green mechanical indicator displaying open/closed contact status
- Halogen-free construction with environmentally conscious design
- Flexible top or bottom copper cable supply connection
- 6-module width DIN rail mounting for standard panel installation
- Rated voltage 400V with 500V insulation voltage and 6kV impulse withstand
- Label holder for clear circuit identification
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 50 A |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA (according to IEC 60947-2) |
| Breaking Capacity at 400V | 25 kA (according to IEC 60947-2) |
| Release Characteristic | D-curve (tripping threshold 500A-700A) |
| Frequency Range | 50-60 Hz |
| Degree of Protection | IP20 (fingerproof, solid bodies >12.5mm) |
| Degree of Impact Strength | IK02 |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Connectable Conductor Cross-Section (Multi-wired) | 1.5-35 mm² |
| Connectable Conductor Cross-Section (Solid-core) | 1.5-50 mm² |
| Connection Type | Screwed terminal with cable connection |
| Supply Direction | Top or bottom |
| Module Width | 6 modules (DIN rail) |
| Built-in Depth | 47 mm |
| Physical Dimensions | Width: 106.8 mm, Height: 127.5 mm, Depth: 79.2 mm |
| Color | Grey (RAL 7035) |
| Mounting Method | DIN rail flush-mounted installation |
| Neutral Conductor Switching | Yes, concurrently switching |
| Pollution Degree | 3 |
| Additional Equipment | Yes, compatible with DX3 auxiliaries and RCD modules |
| Halogen Content | Halogen-free |
| Explosion-proof | No |
| Reference Number | 409851 |
| EAN Code | 3245064098519 |
| Carbon Footprint (Manufacturing) | 6.991 kg CO2 eq. |
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