Professional-grade four-pole thermal-magnetic circuit breaker with 80A capacity, 25kA breaking strength, and IP20 finger-safe terminals for reliable electrical protection and isolation in residential and commercial applications.
The Legrand DX3 MCB is a four-pole modular thermal-magnetic circuit breaker designed for control, protection, and isolation of electrical circuits in residential and small commercial installations. This advanced protection device features a fully visible breaking mechanism with 25kA breaking capacity at 400V, making it suitable for demanding applications. The 80A rated current with C curve characteristic provides reliable protection against overloads and short circuits, with tripping thresholds between 400A and 800A. The device is equipped with IP20 finger-safe terminals that comply with IEC/EN 60529 standards, protecting against solid bodies larger than 12.5mm.
The DX3 circuit breaker is built with a depth of 47mm and occupies 6 modular spacings on a DIN rail, offering a compact footprint for space-constrained installations. It features a red/green mechanical indicator that clearly displays the open or closed status of the contacts, along with a label holder for circuit identification. The device supports copper cable connections from either the top or bottom, with connectable conductor cross sections ranging from 6-50mm² for multi-wired cables and 6-70mm² for solid-core conductors. Additionally, the breaker can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and accessories for enhanced functionality.
Designed with environmental consciousness, the DX3 circuit breaker complies with substance-restriction requirements and is halogen-free. Operating at rated voltage of 400V with nominal voltage range of 360-440V, it maintains performance across frequencies of 50-60Hz. The device operates reliably in ambient temperatures from -25°C to 70°C and can be stored at temperatures from -40°C to 70°C. With its comprehensive protection features, ease of installation, and compatibility with Legrand's extensive accessory range, the DX3 80A circuit breaker is an essential component for modern electrical installations.
Key Features
- Four-pole modular thermal-magnetic circuit breaker for comprehensive circuit protection
- 25kA breaking capacity at 400V with C curve tripping characteristic (400A-800A)
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm
- Fully visible breaking mechanism with red/green mechanical status indicator
- DIN rail mounting with compact 6-module width and 47mm built-in depth
- Flexible cable connection from top or bottom with multi-conductor support
- Compatible with Legrand DX3 auxiliaries and RCD add-on modules
- Halogen-free construction with environmentally conscious design
- Wide operating temperature range -25°C to 70°C for reliable performance
- Concurrently switching neutral conductor for enhanced safety
Technical Specifications
| Specification |
Value |
| Product Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 80 Amperes |
| Release Characteristic | C Curve (5In to 10In) |
| Rated Voltage | 400V AC |
| Nominal Voltage Range | 360-440V |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA (Icu according to IEC 60947-2) |
| Breaking Capacity at 400V | 25 kA (Icu according to IEC 60947-2) |
| Frequency | 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 |
| Overall Width | 106.8 mm |
| Overall Height | 127.5 mm |
| Overall Depth | 79.2 mm |
| Connectable Conductor Cross Section (Multi-wired) | 6-50 mm² |
| Connectable Conductor Cross Section (Solid-core) | 6-70 mm² |
| Connection Type | Screwed terminal with cable connection |
| Electric Supply Direction | Top or bottom connection |
| Ambient Operating Temperature | -25°C to 70°C |
| Storage Temperature | -40°C to 70°C |
| Pollution Degree | 3 |
| Mounting Method | DIN rail |
| Flush-mounted Installation | Yes |
| Concurrent Neutral Switching | Yes |
| Additional Equipment | Compatible with DX3 auxiliaries and RCD add-on modules |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Explosion-proof | No |
| Carbon Footprint (Manufacturing) | 7.173 kg CO₂ eq. |
| Reference Number | 409801 |
| EAN Code | 3245064098014 |
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