| Product Type | Miniature Circuit Breaker (MCB) |
| Brand | Legrand |
| Series | TX3 |
| Reference Number | 404123 |
| EAN Code | 3414970392633 |
| Number of Poles | 3 poles (3P) |
| Rated Current | 6 Amperes (A) |
| Rated Voltage | 400 Volts (V) |
| Rated Insulation Voltage | 500 Volts (Ui) |
| Rated Impulse Withstand Voltage | 4 kV (Uimp) |
| Voltage Type | AC (Alternating Current) |
| Frequency Range | 50-60 Hz |
| Breaking Capacity at 230V | 16 kA (Icn according to EN 60898) |
| Breaking Capacity at 400V | 10 kA (Icn according to EN 60898) |
| Release Characteristic | B-curve (18A to 30A tripping threshold) |
| Current Limiting Class | Class 3 (maximum energy limitation) |
| Degree of Protection | IP20 (fingerproof) |
| Impact Strength | IK02 |
| Width | 53.1 mm (3 modular spacings) |
| Height | 88 mm |
| Depth | 77.8 mm (built-in depth: 44 mm) |
| Color | Grey (RAL 7035) |
| Mounting Method | DIN Rail |
| Connection Type | Screwed terminal, Busbar and cable |
| Electric Supply Direction | Top or bottom |
| Concurrently Switching Neutral | No |
| Pollution Degree | 2 |
| Nominal Voltage Range | 240-415 V |
| Storage Temperature Range | -40°C to +70°C |
| Halogen Free | Yes |
| Flush-Mounted Installation | Yes |
| Additional Equipment Possible | Yes (compatible with DX3 auxiliaries) |
| Label Space | Yes (information surface available) |
| Standard Compliance | IEC 60898-1, IEC/EN 60529, RoHS, REACH |
| Warranty | Legrand standard warranty - subject to proper installation and authorized service |