Thermal magnetic circuit-breaker with 4-pole, 40A rating and B-curve protection for residential and commercial installations. Features 6000A breaking capacity, IP20 finger-safe protection, and compatibility with DX³ auxiliaries.
The Legrand DX3 MCB 4P 40A Curve B is a thermal magnetic circuit-breaker designed to protect wiring installations against overloads and short-circuits. This advanced protective device features a 4-pole configuration with a 40A rated current and B-curve tripping characteristic, providing reliable protection for residential and small commercial applications. With a breaking capacity of 6000A according to IEC 60898-1 standard, it delivers superior performance and safety. The device offers IP20 finger-safe protection, ensuring safety in installation environments, and is compatible with DX³ auxiliaries for enhanced functionality and system integration.
This circuit breaker can be supplied through multiple connection methods including copper cable, prong busbar (top or bottom side), fork busbar (bottom side), or Legrand HX3 plug busbar (top side). The tripping threshold in case of short-circuit ranges between 120A and 200A, with the B curve providing protection between 3 In and 5 In. It features maximum energy limitation (class 3 according to IEC 60898-1 standard) and is equipped with DIN rail clamps for independent removal when the prong busbar is still in place.
The DX3 MCB includes a convenient label holder for clear circuit identification and features ON/OFF indication printed on the handle with red and green backgrounds respectively. Designed with environmental consciousness, this product complies with substance-restriction requirements and is halogen-free. It operates reliably across ambient temperatures from -25°C to 70°C and maintains storage capability from -40°C to 70°C. The device supports concurrent switching of the neutral conductor and is suitable for flush-mounted installation.
Key Features
- 4-pole configuration with 40A rated current and B-curve tripping characteristic
- 6000A breaking capacity according to IEC 60898-1 standard for household installations
- IP20 finger-safe protection with fingerproof design for safe installation
- Compatible with Legrand DX³ auxiliaries, RCD add-on modules and accessories
- Multiple connection options: copper cable, prong busbar, fork busbar, or HX3 plug busbar
- Maximum energy limitation class 3 according to IEC 60898-1 standard
- DIN rail mounted with independent removal capability
- Label holder for clear circuit identification
- Halogen-free and environmentally conscious design
- Concurrent neutral conductor switching capability
Technical Specifications
| Specification |
Value |
| Product Name | MCB DX3 6000A 4 pole 40A curve B |
| Reference Number | 407628 |
| EAN Code | 3245064076289 |
| Number of Poles | 4 |
| Rated Current | 40 A |
| Release Characteristic | B curve (3 In to 5 In) |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 4 kV |
| Breaking Capacity at 400V | 6000 A (6 kA) |
| Breaking Capacity at 230V | 25 kA |
| Short-Circuit Breaking Capacity (Icu) | 10 kA at 400V |
| Current Limiting Class | 3 |
| Frequency | 50-60 Hz |
| Degree of Protection | IP20 (fingerproof) |
| Width | 70.8 mm |
| Height | 94.8 mm |
| Depth | 77.8 mm |
| Built-in Depth | 44 mm |
| Width in Modular Spacings | 4 |
| Degree of Impact Strength | IK02 |
| Ambient Temperature Range | -25°C to 70°C |
| Storage Temperature Range | -40°C to 70°C |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Connectable Conductor Cross Section (Solid-core) | 1.5-35 mm² |
| Connection Type | Screwed terminal |
| Electric Supplying Direction | By the top or bottom |
| Mounting Method | DIN rail |
| Flush-mounted Installation | Yes |
| Concurrent Neutral Conductor Switching | Yes |
| Additional Equipment Possible | Yes |
| Explosion-proof | No |
| Pollution Degree | 2 |
| Color | Grey |
| RAL Number | 7035 |
| Halogen Free | Yes |
| Label Space/Information Surface | Yes |
| Carbon Footprint (Manufacturing Phase) | 3.574 kg CO2 eq. |
| Voltage Type | AC |
| Tripping Threshold (Short-circuit) | 120A to 200A |
Order Legrand DX3 MCB 4P 40A Curve B Circuit Breaker | 407628 at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
