Professional 3-pole 80A circuit breaker with 25kA breaking capacity, D-curve tripping, IP20 finger-safe design, and full DX3 compatibility for reliable 400V circuit protection
The Legrand DX³ three-pole modular thermal-magnetic circuit breaker is a professional-grade electrical protection device designed for reliable protection and isolation of 400V~ circuits up to 80A. This advanced circuit breaker features a 25kA breaking capacity according to IEC 60947-2 standards, with D-curve tripping characteristics that provide optimal protection against short circuits between 800A and 1120A (D curve between 10 In and 14 In). The device is engineered with an IP20 finger-safe design, ensuring protection against solid bodies larger than 12.5mm, making it suitable for safe installation in various electrical environments.
The DX³ circuit breaker offers exceptional compatibility with Legrand DX3 auxiliaries, RCD add-on modules, and comprehensive accessories, allowing for flexible system integration. It features a red/green mechanical indicator that clearly displays the open or closed status of the contacts, along with a convenient label holder for circuit identification. The device supports copper cable supply from either the top or bottom side and can be connected to aluminum cable with the optional terminal accessory. With its 4.5 modular spacing width and DIN rail mounting capability, this circuit breaker is ideal for residential and small commercial panel installations.
This product complies with all substance-restriction requirements and has been designed with environmental consciousness in mind. The halogen-free construction and low carbon footprint (5.885 kg CO2 eq.) during the manufacturing phase demonstrate Legrand's commitment to sustainability. Operating reliably across ambient temperatures from -25°C to 70°C, with rated insulation voltage of 500V and impulse withstand voltage of 6kV, the DX³ circuit breaker delivers dependable performance in demanding electrical applications.
Key Features
- 25kA breaking capacity according to IEC 60947-2 standards
- D-curve tripping with short-circuit protection between 800A-1120A
- IP20 finger-safe design protecting against solid bodies larger than 12.5mm
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Red/green mechanical indicator for clear open/closed status display
- Label holder for convenient circuit identification
- DIN rail mounting with 4.5 modular spacing width
- Halogen-free construction with low environmental impact
- Supports copper cable supply from top or bottom side
- Rated for 400V~ circuits with 500V insulation voltage
Technical Specifications
| Specification |
Value |
| Product Name | MCB DX3 3 Pole 80A Curve D |
| Reference Number | 409840 |
| EAN Code | 3245064098403 |
| Manufacturer | Legrand |
| Number of Poles | 3 poles (3 protected poles) |
| Rated Current | 80 A |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA |
| Breaking Capacity at 400V | 25 kA |
| Release Characteristic | D Curve |
| Tripping Threshold | 800A - 1120A (D curve between 10 In and 14 In) |
| Frequency | 50-60 Hz |
| Degree of Protection | IP20 |
| Degree of Impact Strength | IK02 |
| Built-in Depth | 47 mm |
| Width | 80.1 mm |
| Height | 127.5 mm |
| Depth | 79.2 mm |
| Modular Spacing Width | 4.5 modules |
| Connectable Conductor Cross Section (Multi-wired) | 6-50 mm² |
| Connectable Conductor Cross Section (Solid-core) | 6-70 mm² |
| Connection Type | Screwed terminal, Cable |
| Mounting Method | DIN rail |
| Electric Supplying Direction | Top or bottom |
| Ambient Temperature Operating Range | -25°C to 70°C |
| Storage Temperature Range | -40°C to 70°C |
| Nominal Voltage Range | 360-440 V |
| Pollution Degree | 3 |
| Color | Grey |
| RAL Number | 7035 |
| Halogen Free | Yes |
| Carbon Footprint (Manufacturing Phase) | 5.885 kg CO2 eq. |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral Conductor | No |
| Additional Equipment Possible | Yes |
| Explosion-proof | No |
| Label Space/Information Surface | Yes |
| Terminal Marking Indication | No |
| Warranty | Standard Legrand warranty - See product documentation |
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