2-pole 40A thermal-magnetic circuit breaker with 6000A breaking capacity, C-curve release, IP20 fingerproof design, and advanced energy limitation for reliable household and commercial electrical protection.
The Legrand TX3 MCB (Miniature Circuit Breaker) is a thermal-magnetic circuit breaker designed for household and small commercial wiring protection. With a 2-pole configuration and 40A rated current, this device provides reliable protection against overloads and short-circuits with a 6000A breaking capacity according to IEC 60898-1 standard. The C-curve release characteristic offers a tripping threshold between 200A and 400A (5-10 times the rated current), making it ideal for circuits with moderate inrush currents. This IP20-rated device features a fingerproof design that protects against solid bodies larger than 12.5mm, ensuring safe installation in residential and commercial environments.
The TX3 MCB incorporates advanced energy limitation technology (class 3 according to IEC 60898-1), significantly reducing let-through energy during fault conditions. It can be supplied via copper cable, prong busbar (top or bottom side), or fork busbar (bottom side), offering flexible installation options. The device features a special DIN rail clamp on the bottom side, allowing independent removal even when the fork busbar is still in place. A convenient label holder enables clear circuit identification, while ON/OFF indication is printed on the handle with red and green backgrounds for easy status identification.
Built to the highest standards, this circuit breaker complies with all substance-restriction requirements and has been designed using environmentally conscious processes. It is compatible with Legrand DX3 auxiliaries and accessories, and can be connected to aluminum cables using Legrand DX3 terminal accessories. The device operates across a frequency range of 50-60 Hz with a rated voltage of 400V and insulation voltage of 500V, making it suitable for various electrical systems worldwide.
Key Features
- 6000A breaking capacity according to IEC 60898-1 standard for household installations
- C-curve release characteristic with tripping threshold between 200A and 400A (5-10 times rated current)
- IP20 fingerproof design protecting against solid bodies larger than 12.5mm
- Advanced energy limitation class 3 significantly reducing let-through energy during faults
- Compatible with Legrand DX3 auxiliaries and accessories for enhanced functionality
- Flexible supply options: copper cable, prong busbar, or fork busbar connections
- Special DIN rail clamp allowing independent removal while fork busbar remains in place
- Clear label holder and ON/OFF indication for easy circuit identification and status monitoring
- Operates at 50-60 Hz frequency with 400V rated voltage and 500V insulation voltage
- Environmentally conscious design complying with substance-restriction requirements
Technical Specifications
| Specification |
Value |
| Product Type | Miniature Circuit Breaker (MCB) |
| Manufacturer | Legrand |
| Model Series | TX3 |
| Reference Number | 403532 |
| EAN Code | 3414970389244 |
| Number of Poles | 2 (2P) |
| Rated Current | 40 Amperes |
| Release Characteristic | C Curve |
| Breaking Capacity (Icn) | 6000A at 400V / 10kA at 230V |
| Rated Voltage | 400V AC |
| Insulation Voltage (Ui) | 500V |
| Impulse Withstand Voltage (Uimp) | 4 kV |
| Frequency Range | 50-60 Hz |
| Current Limiting Class | 3 |
| Degree of Protection (IP) | IP20 |
| Degree of Impact Strength (IK) | IK02 |
| Width (Modular Spacings) | 2 modules |
| Width | 35.4 mm |
| Height | 88 mm |
| Depth | 77.8 mm |
| Built-in Depth | 44 mm |
| Color | Grey (RAL 7035) |
| Connection Type | Screwed terminal, Busbar and cable |
| Electric Supplying Direction | Top or bottom |
| Mounting Method | DIN Rail |
| Mounting Installation | Flush-mounted installation available |
| Neutral Conductor Switching | No concurrent switching of neutral conductor |
| Pollution Degree | 2 |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 240V to 415V |
| Halogen Free | Yes |
| Additional Equipment | Possible with DX3 auxiliaries |
| Label Space | Yes - information surface available |
| Tripping Threshold (C Curve) | 200A to 400A (5-10 times In) |
| Supply Options | Copper cable, prong busbar (top/bottom), fork busbar (bottom) |
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