Professional-grade 4-pole circuit breaker with 25A rating and 25kA breaking capacity, featuring D-curve protection, IP20 terminals, and compatibility with Legrand DX³ accessories for reliable electrical circuit protection.
The Legrand DX³ four-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. With a robust 25kA breaking capacity at 400V~, this circuit breaker provides reliable short-circuit protection with D-curve tripping characteristics that deliver rapid response between 250A and 350A. The device features IP20 finger-safe terminals ensuring safe operation in various installation environments while maintaining compliance with international safety standards.
This advanced circuit breaker is engineered with top or bottom copper cable supply capability, making it highly adaptable to different installation configurations. The built-in label holder allows clear circuit identification, while the red/green mechanical indicator provides instant visual confirmation of contact status (open or closed). Compatible with the complete range of Legrand DX³ auxiliaries, RCD add-on modules, and accessories, this breaker integrates seamlessly into modern electrical distribution systems.
Designed with environmental consciousness, the DX³ circuit breaker complies with substance-restriction requirements and features halogen-free construction. Operating across a wide temperature range from -25°C to 70°C, it accommodates multi-wired conductor cross-sections from 1.5 to 35mm² and solid-core conductors up to 50mm². The 6-module width design fits standard DIN rail mounting, making installation straightforward for qualified electricians.
Key Features
- 25kA breaking capacity at 400V with reliable short-circuit protection
- D-curve tripping characteristic for rapid response between 250A-350A
- IP20 finger-safe terminals ensuring safe operation and compliance
- Compatible with complete Legrand DX³ auxiliaries and RCD add-on modules
- Built-in label holder with red/green mechanical status indicator
- Top or bottom copper cable supply for flexible installation
- Halogen-free construction with environmental compliance
- Wide operating temperature range from -25°C to 70°C
- 6-module DIN rail mounting for standard electrical panels
- Accommodates conductor cross-sections from 1.5 to 50mm²
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (3 protected + 1 neutral) |
| Rated Current | 25 Amperes |
| Rated Voltage | 400V AC |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA |
| Breaking Capacity at 400V | 25 kA |
| Tripping Characteristic | D-curve (250A-350A) |
| Frequency Range | 50-60 Hz |
| Degree of Protection | IP20 (Finger-safe terminals) |
| Impact Strength Rating | IK02 |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Multi-wired Conductor Cross-section | 1.5-35 mm² |
| Solid-core Conductor Cross-section | 1.5-50 mm² |
| Connection Type | Screwed terminal with cable connection |
| Supply Direction | Top or bottom |
| Module Width | 6 modules (106.8 mm) |
| Height | 127.5 mm |
| Depth | 79.2 mm (built-in: 47 mm) |
| Color | Grey (RAL 7035) |
| Mounting Method | DIN rail |
| Halogen Free | Yes |
| Pollution Degree | 3 |
| Nominal Voltage Range | 360-440V |
| Concurrent Neutral Switching | Yes |
| Flush-mounted Installation | Yes |
| Additional Equipment Possible | Yes (DX³ auxiliaries, RCD modules) |
| Reference Number | 409848 |
| EAN Code | 3245064098489 |
| Carbon Footprint (Manufacturing) | 6.899 kg CO₂ eq. |
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