Professional 4-pole 16A D-curve circuit breaker with 25kA breaking capacity, IP20 finger-safe terminals, and advanced thermal-magnetic protection for reliable electrical circuit management.
The Legrand DX3 4-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 circuit breaker features a fully visible breaking mechanism with a 25kA breaking capacity at 400V~, making it suitable for demanding electrical environments. The 16A D-curve rating provides optimal protection against overloads and short circuits, with tripping thresholds between 160A and 224A (D curve between 10 In and 14 In). The device is equipped with IP20 finger-safe terminals, ensuring safe operation in compliance with IEC/EN 60529 standards.
This four-pole circuit breaker is constructed with advanced thermal-magnetic technology that delivers reliable and consistent performance. It features a red/green mechanical indicator that clearly displays the status of the contacts (open or closed), and includes a convenient label holder for circuit identification. The DX3 can be supplied by copper cable from either the top or bottom side, and supports connectable conductor cross-sections ranging from 1.5-35mm² for multi-wired cables and 1.5-50mm² for solid-core cables. The device operates efficiently across a wide ambient temperature range of -25°C to 70°C and maintains halogen-free construction for environmental compliance.
The DX3 circuit breaker is designed for DIN rail mounting and can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories to enhance functionality. It complies with substance-restriction requirements and has been developed through an environmentally conscious manufacturing process. With its 6-module width (106.8mm) and comprehensive technical specifications, this circuit breaker represents a professional-grade solution for electrical circuit protection and management.
Key Features
- 25kA breaking capacity at 400V~ with D-curve protection between 160A-224A
- IP20 finger-safe terminals compliant with IEC/EN 60529 standards
- Red/green mechanical indicator for clear open/closed status display
- DIN rail mounting with 6-module width (106.8mm) for space-efficient installation
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Halogen-free construction with environmental compliance and sustainable design
- Supports copper cable supply from top or bottom with flexible terminal options
- Wide operating temperature range -25°C to 70°C with reliable thermal-magnetic technology
- Label holder for convenient circuit identification and organization
- Fully visible breaking mechanism for safe and transparent operation
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (3 protected + 1 neutral) |
| Rated Current | 16 Amperes |
| Trip Characteristic | D-curve (160A-224A tripping threshold) |
| Rated Voltage | 400V AC |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 400V | 25 kA |
| Breaking Capacity at 230V | 50 kA |
| Frequency | 50-60 Hz |
| Degree of Protection | IP20 (Finger-safe terminals) |
| Degree of Impact Strength | IK02 |
| 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 |
| Mounting Method | DIN rail |
| Width (Module Count) | 6 modules |
| Width | 106.8 mm |
| Height | 127.5 mm |
| Depth | 79.2 mm (Built-in depth: 47 mm) |
| Operating Temperature Range | -25°C to 70°C |
| Storage Temperature Range | -40°C to 70°C |
| Nominal Voltage Range | 360-440V |
| Pollution Degree | 3 |
| Halogen Free | Yes |
| Color | Grey (RAL 7035) |
| Concurrent Switching of Neutral | Yes |
| Additional Equipment Possible | Yes (Auxiliaries, RCD modules, accessories) |
| Reference Number | 409846 |
| EAN Code | 3245064098465 |
| Carbon Footprint (Manufacturing) | 6.881 kg CO₂ eq. |
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