Legrand DX3 modular 2-pole 40A circuit breaker with 25kA breaking capacity, D-curve protection, IP20 finger-safe terminals, and DIN rail mounting for residential and commercial electrical circuits.
The Legrand DX3 MCB 2 Pole 40A Curve D is a modular thermal-magnetic circuit breaker designed for control, protection, and isolation of electrical circuits in residential and small commercial applications. This high-performance device delivers a 25kA breaking capacity at 400V with D-curve tripping characteristics between 10In and 14In, providing reliable short-circuit protection. The circuit breaker features IP20 finger-safe terminals that protect against solid bodies larger than 12.5mm, ensuring safe operation in various environments.
Built with advanced thermal-magnetic technology, this DX3 model offers exceptional reliability and durability for modern electrical installations. The device is equipped with a red/green mechanical indicator that clearly displays the contact status as either open or closed, and includes a convenient label holder for circuit identification. With a built-in depth of 47mm and width of 53.4mm, it fits seamlessly into standard DIN rail installations. The breaker supports both solid-core (1.5-50mm²) and multi-wired (1.5-35mm²) conductor connections from the top or bottom, providing flexible installation options.
This product is fully compliant with IEC 60947-2 standards and incorporates environmental consciousness in its design. It can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for enhanced functionality. Operating reliably across ambient temperatures from -25°C to 70°C, this circuit breaker is halogen-free and manufactured with substance-restriction compliance, making it an excellent choice for safe, sustainable electrical protection.
Key Features
- 25kA breaking capacity at 400V with IEC 60947-2 compliance
- D-curve thermal-magnetic tripping between 10In and 14In for reliable short-circuit protection
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm
- Red/green mechanical indicator displaying open/closed contact status
- DIN rail mounting with 3-module width (53.4mm) and 47mm built-in depth
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and accessories
- Flexible top or bottom cable supply connection options
- Halogen-free construction with environmental compliance
- Operating temperature range -25°C to 70°C with storage up to -40°C to 70°C
- Supports both solid-core (1.5-50mm²) and multi-wired (1.5-35mm²) conductors
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Manufacturer | Legrand |
| Model Series | DX3 |
| Number of Poles | 2 (Bipolar) |
| Rated Current | 40 Amperes |
| Rated Voltage | 400V AC |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA (Icu) |
| Breaking Capacity at 400V | 25 kA (Icu) |
| Trip Characteristic | D-Curve (10In to 14In) |
| Frequency | 50-60 Hz |
| Degree of Protection | IP20 (Finger-safe) |
| Impact Strength Rating | IK02 |
| Width in Module Spacings | 3 modules |
| Built-in Depth | 47 mm |
| Width | 53.4 mm |
| Height | 127.5 mm |
| Depth | 79.2 mm |
| Solid-Core Conductor Range | 1.5-50 mm² |
| Multi-Wired Conductor Range | 1.5-35 mm² |
| Connection Type | Screwed Terminal with Cable |
| Supply Direction | Top or Bottom |
| Mounting Method | DIN Rail |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440V |
| Pollution Degree | 3 |
| Color | Grey (RAL 7035) |
| Halogen Content | Halogen-free |
| Flush-Mounted Installation | Yes |
| Neutral Conductor Switching | No |
| Additional Equipment | Compatible with DX3 auxiliaries and RCD add-on modules |
| Label Holder | Yes |
| Mechanical Indicator | Red/Green Status Display |
| Reference Number | 409824 |
| EAN Code | 3245064098243 |
| Carbon Footprint (Manufacturing) | 3.548 kg CO2 eq. |
| Standards Compliance | IEC 60947-2, IEC/EN 60529 |
| Environmental Certification | RoHS Directive Compliant |
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