Premium 4-pole thermal-magnetic circuit breaker with 25kA breaking capacity, 40A D-curve rating, IP20 safety terminals, and comprehensive Legrand accessory compatibility for reliable electrical protection.
The Legrand DX3 4-pole modular thermal-magnetic circuit breaker is a premium electrical protection device designed for control, protection, and isolation of electrical circuits in residential and small commercial installations. This high-performance breaker features a 25kA breaking capacity at 400V AC with a D-curve 40A rating, making it ideal for applications requiring reliable short-circuit protection. The device incorporates IP20 finger-safe terminals that provide enhanced safety, preventing accidental contact with live components. Built with advanced thermal-magnetic technology, it delivers precise protection against both overload and short-circuit conditions.
The DX3 circuit breaker is engineered for compatibility with a comprehensive range of Legrand accessories and add-on modules, including RCD modules for residual current detection. Its modular design allows for flexible installation on DIN rails, occupying 6 modular spacings with a built-in depth of 47mm. The breaker features a red/green mechanical indicator that clearly displays the open or closed status of contacts, coupled with a convenient label holder for circuit identification. Constructed with halogen-free materials, this device demonstrates environmental consciousness while maintaining the highest safety and performance standards.
With a rated voltage of 400V AC and insulation voltage of 500V, the DX3 breaker operates reliably across a wide temperature range from -25°C to +70°C. The device can be supplied from either the top or bottom, offering flexible installation options. Its grey color (RAL 7035) and compact dimensions (106.8mm width, 127.5mm height, 79.2mm depth) enable seamless integration into modern electrical panels. The screwed terminal connection type accommodates solid-core conductors from 1.5 to 50mm² and multi-wired conductors from 1.5 to 35mm², providing versatile wiring compatibility.
Key Features
- 25kA breaking capacity at 400V AC with D-curve protection
- IP20 finger-safe terminals preventing accidental contact
- Red/green mechanical indicator for clear open/closed status display
- Compatible with Legrand DX3 accessories and RCD add-on modules
- Halogen-free construction with environmental consciousness
- Flexible top or bottom supply connection options
- Wide operating temperature range from -25°C to +70°C
- Compact modular design occupying 6 DIN rail spacings
- Built-in label holder for convenient circuit identification
- Supports both solid-core and multi-wired conductors
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 40 Amperes |
| Release Characteristic | D-curve (10In to 14In) |
| 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 |
| Frequency Range | 50-60 Hz |
| Degree of Protection | IP20 |
| Degree of Impact Strength | IK02 |
| Built-in Depth | 47 mm |
| Width in Modular Spacings | 6 spacings |
| Overall Width | 106.8 mm |
| Overall Height | 127.5 mm |
| Overall Depth | 79.2 mm |
| Color | Grey (RAL 7035) |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440V |
| Solid-core Conductor Cross Section | 1.5-50 mm² |
| Multi-wired Conductor Cross Section | 1.5-35 mm² |
| Connection Type | Screwed terminal |
| Supply Direction | Top or bottom |
| Mounting Method | DIN rail |
| Concurrently Switching Neutral | Yes |
| Flush-mounted Installation | Yes |
| Additional Equipment Possible | Yes |
| Pollution Degree | 3 |
| Halogen Free | Yes |
| Carbon Footprint (Manufacturing) | 6.991 kg CO₂ eq. |
| Reference Number | 409850 |
| EAN Code | 3245064098502 |
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