Professional 4-pole 40A modular circuit breaker with 25kA breaking capacity, C curve protection, IP20 terminals, and comprehensive compatibility with Legrand auxiliaries and accessories for reliable electrical circuit protection.
The Legrand DX3 4 Pole 40A Curve C Circuit Breaker is a professional-grade modular thermal-magnetic circuit breaker designed for comprehensive control, protection, and isolation of electrical circuits. This high-performance device delivers exceptional 25kA breaking capacity at 400V AC with C curve tripping characteristics, making it ideal for residential and small commercial panel applications. The breaker features IP20 finger-safe terminals that comply with IEC/EN 60529 standards, ensuring safe operation in various environments. With its robust construction and advanced protection mechanisms, this circuit breaker provides reliable safeguarding against overcurrent and short-circuit faults.
This DX3 model offers superior compatibility with Legrand's extensive range of auxiliaries, RCD add-on modules, and accessories, allowing for flexible system integration and customization. The device is equipped with a convenient label holder for clear circuit identification and a red/green mechanical indicator that displays the open or closed status of the contacts at a glance. The thermal-magnetic release mechanism ensures precise tripping thresholds between 200A and 400A, providing dependable protection across a wide range of electrical loads. The breaker can be supplied by copper cable from either the top or bottom side, offering installation flexibility.
Built with environmental consciousness, this circuit breaker complies with all substance-restriction requirements and is halogen-free, making it an eco-friendly choice for modern electrical installations. The 6-module width design fits seamlessly into standard DIN rail installations, while the grey finish (RAL 7035) provides a professional appearance. With an operating temperature range of -25°C to 70°C and storage capability from -40°C to 70°C, this breaker performs reliably in diverse climatic conditions. The product is backed by comprehensive technical documentation and carries appropriate certifications for safety and environmental compliance.
Key Features
- 25kA breaking capacity at 400V AC with C curve tripping characteristics for reliable short-circuit protection
- IP20 finger-safe terminals compliant with IEC/EN 60529 standards ensuring safe operation
- Red/green mechanical indicator displaying open/closed contact status at a glance
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and comprehensive accessories
- Thermal-magnetic release mechanism with precise tripping thresholds between 200A and 400A
- 6-module width DIN rail mounting design for flexible installation integration
- Halogen-free construction with environmentally conscious design and eco-friendly compliance
- Label holder for clear and visible circuit identification and convenient labeling
- Top or bottom copper cable supply option providing installation flexibility
- Wide operating temperature range from -25°C to 70°C for diverse climate conditions
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 40 Amperes |
| Rated Voltage | 400V AC |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA according to IEC 60947-2 |
| Breaking Capacity at 400V | 25 kA according to IEC 60947-2 |
| Release Characteristic | C Curve (5In to 10In tripping threshold) |
| Short-Circuit Tripping Range | 200A to 400A |
| Frequency Range | 50-60 Hz |
| Degree of Protection | IP20 (Finger-safe terminals) |
| Degree of Impact Strength | IK02 |
| Built-in Depth | 47 mm |
| Module Width | 6 modular spacings (106.8 mm) |
| Height | 127.5 mm |
| Total Depth | 79.2 mm |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-35 mm² |
| Connectable Conductor Cross Section (Solid-core) | 1.5-50 mm² |
| Connection Type | Screwed terminals with cable connection |
| Electric Supply Direction | Top or bottom supply |
| Mounting Method | DIN rail mounting |
| Concurrent Switching of Neutral | Yes |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440V |
| Pollution Degree | 3 |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Additional Equipment | Compatible with Legrand DX3 auxiliaries and RCD add-on modules |
| Reference Number | 409798 |
| EAN Code | 3245064097987 |
| Flush-mounted Installation | Yes |
| Label Space | Yes (Label holder included) |
| Carbon Footprint (Manufacturing) | 8.324 kg CO2 eq. |
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