| Product Type | Three-Pole Modular Circuit Breaker (MCB) |
| Manufacturer | Legrand |
| Model Series | DX³ |
| Reference Number | 409508 |
| EAN Code | 3245064095082 |
| Number of Poles | 3 (Three-pole) |
| Rated Current | 125 A |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage (Ui) | 500 V |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV |
| Release Characteristic | D-Curve |
| Short-Circuit Breaking Capacity (IEC 60898-1) | 10,000 A at 400V |
| Short-Circuit Breaking Capacity (IEC 60947-2) | 16 kA at 400V / 32 kA at 230V |
| Tripping Threshold (D-Curve) | 1,250A to 1,750A (10 In to 14 In) |
| Frequency Range | 50-60 Hz |
| Degree of Protection (IP) | IP20 (Finger-safe) |
| Impact Strength Rating (IK) | IK02 |
| Pollution Degree | 3 |
| Mounting Method | DIN Rail |
| Built-in Depth | 47 mm |
| Width in Modular Spacings | 4.5 |
| Physical Width | 53.1 mm |
| Physical Height | 94.8 mm |
| Physical Depth | 77.8 mm |
| Connection Type | Screwed Terminal |
| Supply Direction | Top or Bottom |
| Connectable Conductor Cross-Section (Multi-wired) | 6-50 mm² |
| Connectable Conductor Cross-Section (Solid-core) | 6-70 mm² |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Colour | Grey |
| RAL Number | 7035 |
| Halogen Free | Yes |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral Conductor | No |
| Additional Equipment Possible | Yes (RCD add-on modules and auxiliaries) |
| Label Space/Information Surface | Yes |
| Mechanical Indicator | Red/Green (Open/Closed Status) |
| Carbon Footprint (Manufacturing Phase) | 4.965 kg CO₂ eq. |
| Standards Compliance | IEC 60898-1, IEC 60947-2, IEC/EN 60529 |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
