Single-pole 25A C-curve MCB with 25kA breaking capacity, IP20 finger-safe design, DIN rail mounting, and compatibility with Legrand accessories for reliable residential and commercial protection.
The Legrand DX3 MCB (Miniature Circuit Breaker) is a single-pole modular thermal-magnetic circuit breaker designed for residential and small commercial electrical installations. This 25A rated device features a C-curve trip characteristic, providing reliable protection against overcurrent and short-circuit conditions with a breaking capacity of 25kA at 230/400V AC. The fully visible breaking mechanism ensures safe operation, while the IP20 finger-safe design protects against accidental contact with live parts. The device is equipped with DIN rail mounting capability using dual clamps (top and bottom), allowing independent removal even when the busbar supply remains connected.
This MCB combines advanced thermal-magnetic protection technology with user-friendly design features. The C-curve characteristic (tripping between 5In and 10In) makes it ideal for circuits with moderate inrush currents typical of residential applications. The built-in depth of 44mm and width of 17.8mm (1-module spacing) ensure compact installation in standard distribution panels. The device supports multiple connection methods including copper cables (1.5-35mm² solid-core or 1.5-25mm² multi-wired), prong busbars, fork busbars, and Legrand HX3 plug busbars, offering maximum installation flexibility.
The DX3 series includes comprehensive safety features and environmental compliance. Operating across a temperature range of -25°C to +70°C, the breaker maintains consistent performance in various climates. The halogen-free design and environmentally conscious manufacturing process reflect modern sustainability standards. Additional features include a label holder for circuit identification, clearly marked ON/OFF positions with red/green backgrounds, and compatibility with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for enhanced system integration.
Key Features
- 25kA breaking capacity at 230/400V AC according to IEC 60947-2 standard
- C-curve trip characteristic with short-circuit threshold between 125A-250A
- IP20 finger-safe protection against solid bodies larger than 12.5mm
- DIN rail mounting with dual independent clamps for easy installation and removal
- Multiple connection options: copper cables, prong busbar, fork busbar, and HX3 plug busbar
- Fully visible breaking mechanism for safe operation confirmation
- Label holder with clearly marked ON/OFF indicators in red and green
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and accessories
- Halogen-free design with environmentally conscious manufacturing
- Wide operating temperature range -25°C to +70°C for reliable performance
Technical Specifications
| Specification |
Value |
| Product Type | Single-Pole Miniature Circuit Breaker (MCB) |
| Rated Current | 25 A |
| Rated Voltage | 230 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 4 kV |
| Breaking Capacity (Icu) | 25 kA at 230V |
| Trip Characteristic | C-curve (5In to 10In) |
| Short-Circuit Threshold | 125A to 250A |
| Number of Poles | 1 pole |
| Number of Protected Poles | 1 |
| Degree of Protection | IP20 |
| Degree of Impact Strength | IK02 |
| Width | 17.8 mm (1 module spacing) |
| Height | 94.8 mm |
| Depth | 77.8 mm / Built-in depth: 44 mm |
| Mounting Method | DIN rail with dual clamps |
| Connectable Conductor Cross Section (Solid-core) | 1.5 to 35 mm² |
| Connectable Conductor Cross Section (Multi-wired) | 1.5 to 25 mm² |
| Connection Type | Screwed terminal, Busbar and cable |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Frequency | 50-60 Hz |
| Nominal Voltage Range | 210 to 250 V |
| Pollution Degree | 3 |
| Supply Direction | Top or bottom |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Flush-mounted Installation | Yes |
| Additional Equipment Possible | Yes |
| Concurrently Switching Neutral Conductor | No |
| Explosion-proof | No |
| Carbon Footprint (Manufacturing Phase) | 0.982 kg CO₂ eq. |
| Reference Number | 409757 |
| EAN Code | 3245064097574 |
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