Legrand DX3 thermal magnetic circuit-breaker with 4-pole, 13A B-curve, 10kA breaking capacity for reliable electrical protection in residential and commercial installations.
The Legrand DX3 MCB (Miniature Circuit Breaker) is a thermal magnetic circuit-breaker designed to protect wiring installations against overloads and short-circuits. This 4-pole device features a 13A rated current with B curve release characteristic and operates at 400V AC. With a breaking capacity of 10kA according to IEC 60898-1 standard, it provides reliable protection for residential and small commercial electrical systems. The device is IP20 finger-safe rated, ensuring protection against solid bodies larger than 12.5mm, making it suitable for safe installation in accessible locations.
This circuit breaker incorporates advanced safety features including a maximum energy limitation class 3 rating according to IEC 60898-1 standard. It can be supplied through multiple connection methods including copper cables, prong busbars, fork busbars, or Legrand HX3 plug busbars. The DX3 is compatible with Legrand auxiliaries, RCD add-on modules, and various accessories, providing flexibility for system expansion and customization. Its label holder allows for clear circuit identification, while the ON/OFF indication printed on the handle (red and green backgrounds) enables easy status identification.
With a built-in depth of 44mm and mounting width of 70.8mm, the DX3 fits standard DIN rail installations. The device features independent DIN rail clamps on both top and bottom sides, allowing removal without disrupting the busbar supply. Operating temperature range is -25°C to 70°C, with storage capability from -40°C to 70°C. The halogen-free design demonstrates environmental consciousness, and the product complies with substance-restriction requirements. Reference number 409064 with EAN 3245064090643.
Key Features
- 4-pole configuration with concurrent switching of neutral conductor for complete circuit protection
- B curve release characteristic with tripping threshold between 39A and 65A (3-5 In) for optimal overload protection
- 10kA breaking capacity according to IEC 60898-1 standard ensuring reliable short-circuit protection
- IP20 finger-safe design protecting against solid bodies larger than 12.5mm for safe installation
- Energy limitation class 3 providing maximum let-through energy limitation
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and multiple accessories
- Independent DIN rail clamps allowing removal without disrupting busbar supply
- Label holder with clear ON/OFF indication for easy circuit identification and status monitoring
- Accepts copper cables, prong busbars, fork busbars and Legrand HX3 plug busbars
- Halogen-free environmentally conscious design complying with substance-restriction requirements
Technical Specifications
| Specification |
Value |
| Rated Current | 13 A |
| Number of Poles | 4 |
| Release Characteristic | B Curve |
| Rated Voltage | 400 V AC |
| Breaking Capacity (10kA) | According to IEC 60898-1 at 400V |
| Rated Short-Circuit Breaking Capacity Icn | 10 kA at 400V / 16 kA at 230V |
| Rated Short-Circuit Breaking Capacity Icu | 16 kA at 400V / 32 kA at 230V |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 4 kV |
| Current Limiting Class | 3 |
| Degree of Protection | IP20 |
| Tripping Threshold (B Curve) | Between 39A and 65A (3-5 In) |
| Built-in Depth | 44 mm |
| Width in Modular Spacings | 4 |
| Overall Width | 70.8 mm |
| Overall Height | 94.8 mm |
| Overall Depth | 77.8 mm |
| Connectable Conductor Cross-Section (Multi-wired) | 1.5-25 mm² |
| Connectable Conductor Cross-Section (Solid-core) | 1.5-35 mm² |
| Operating Temperature Range | -25°C to 70°C |
| Storage Temperature Range | -40°C to 70°C |
| Frequency | 50-60 Hz |
| Connection Type | Screwed Terminal |
| Mounting Method | DIN Rail |
| Colour | Grey (RAL 7035) |
| Degree of Impact Strength | IK02 |
| Pollution Degree | 2 |
| Concurrently Switching Neutral Conductor | Yes |
| Flush-mounted Installation | Yes |
| Halogen Free | Yes |
| Additional Equipment Possible | Yes |
| Reference Number | 409064 |
| EAN Code | 3245064090643 |
| Supply Methods | Copper cable, prong busbar, fork busbar, Legrand HX3 plug busbar |
| Carbon Footprint (Manufacturing) | 3.651 kg CO₂ eq. |
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