Professional three-pole modular circuit breaker with 10A D-curve rating and 25kA breaking capacity for reliable electrical circuit protection 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 MCB delivers exceptional performance with a 25kA breaking capacity at 400V and provides D-curve protection with a 10A rated current, making it ideal for circuits requiring moderate overload protection. The device features advanced thermal-magnetic tripping technology that responds quickly to both thermal overloads (gradual heating) and magnetic short-circuits (sudden current surges), ensuring reliable circuit protection and equipment safety.
Engineered with precision and built to the highest industry standards, the DX3 circuit breaker offers IP20 protection against solid bodies larger than 12.5mm, ensuring fingerproof safety in standard installation environments. The breaker is compatible with multiple supply methods including copper cables, prong busbars, fork busbars, and Legrand HX3 plug busbars, providing flexible installation options for various electrical configurations. With its modular design, the DX3 can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories to customize protection and functionality according to specific application requirements.
The DX3 three-pole breaker is manufactured with environmental consciousness, featuring halogen-free materials and complying with all substance-restriction requirements including RoHS and REACH directives. Its robust construction ensures reliable performance across ambient temperatures from -25°C to +70°C, with a storage capability extending to -40°C to +70°C. The device includes convenient features such as DIN rail mounting with independent removal capability, a label holder for circuit identification, and clear on/off indication printed on the handle for easy status recognition. This is a premium solution for electrical professionals seeking dependable circuit protection and isolation in demanding applications.
Key Features
- 25kA breaking capacity at 400V with D-curve thermal-magnetic protection
- Three-pole configuration for comprehensive three-phase circuit protection
- IP20 fingerproof protection against solid bodies larger than 12.5mm
- Compatible with multiple supply methods including cables and various busbar types
- DIN rail mounting with independent removal capability and label holder
- Supports Legrand DX3 auxiliaries and RCD add-on modules for enhanced functionality
- Halogen-free construction with RoHS and REACH compliance for environmental safety
- Clear on/off indication with red and green backgrounds for easy status identification
- Operating temperature range from -25°C to +70°C for diverse environmental conditions
- Modular design allows flexible installation in electrical distribution systems
Technical Specifications
| Specification |
Value |
| Product Type | Three-Pole Modular Circuit Breaker (MCB) |
| Rated Current | 10 A |
| Release Characteristic | D-Curve (100A-140A short-circuit tripping threshold) |
| Breaking Capacity at 230V | 50 kA according to IEC 60947-2 |
| Breaking Capacity at 400V | 25 kA according to IEC 60947-2 |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 4 kV |
| Frequency Range | 50-60 Hz |
| Number of Poles | 3 poles (3 protected poles) |
| Degree of Protection | IP20 (Fingerproof) |
| Built-in Depth | 44 mm |
| Width | 53.1 mm |
| Height | 94.8 mm |
| Total Depth | 77.8 mm |
| Width in Modular Spacings | 3 modules |
| Modular Spacings | DIN rail mounting |
| Connectable Conductor Cross Section (Solid) | 1.5-35 mm² |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Connection Type | Screwed terminal, Busbar and cable |
| Supply Direction | Top or bottom connection |
| Ambient Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +70°C |
| Nominal Voltage Range | 360-440 V |
| Pollution Degree | 3 |
| Degree of Impact Strength | IK02 |
| Color | Grey (RAL 7035) |
| Halogen Free | Yes |
| Material Composition | Environmentally conscious design with halogen-free materials |
| Additional Equipment | Supports DX3 auxiliaries, RCD add-on modules, and accessories |
| Mounting Method | DIN rail with independent removal capability |
| Label Space | Yes - Label holder for circuit identification |
| Concurrently Switching Neutral | No |
| Flush-mounted Installation | Yes |
| Explosion-proof | No |
| Reference Number | 409832 |
| EAN Code | 3245064098328 |
| Carbon Footprint (Manufacturing) | 2.885 kg CO₂ eq. |
| Regulatory Compliance | RoHS Directive, REACH Declaration, IEC 60947-2 compliant |
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