Thermal magnetic 4-pole circuit breaker with 4A rating, 10kA breaking capacity, B curve protection, IP20 fingerproof safety, and DIN rail mounting for reliable electrical installation protection.
The Legrand DX3 MCB 4 Pole 4A Circuit Breaker is a thermal magnetic circuit-breaker designed to protect wiring installations against overloads and short-circuits. With a breaking capacity of 10,000A at 400V, this device provides reliable control and isolation for residential and small commercial applications. The circuit breaker features a B curve release characteristic with a tripping threshold between 12A and 20A (3-5 In), ensuring precise protection. Its IP20 fingerproof safety rating protects against solid bodies larger than 12.5mm, making it suitable for various installation environments.
This 4-pole device can be supplied through multiple connection methods including copper cable, prong busbar, fork busbar, or Legrand HX3 plug busbar. It offers maximum energy limitation (class 3 according to IEC 60898-1 standard) and is compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories. The built-in depth of 44mm and DIN rail mounting system with dual clamps allows for convenient installation and independent removal without disrupting the main power supply.
The device complies with all substance-restriction requirements and has been designed with environmental consciousness. It features a label holder for clear circuit identification and on/off indication printed on the handle with red and green backgrounds. Operating in temperatures from -25°C to 70°C, this circuit breaker is rated for 50-60Hz frequency operation and provides reliable protection in both flush-mounted and standard installations.
Key Features
- 10,000A breaking capacity at 400V with B curve release characteristic (3-5 In tripping threshold)
- 4-pole, 4A rated current with 500V rated insulation voltage and 4kV impulse withstand voltage
- IP20 fingerproof protection against solid bodies larger than 12.5mm per IEC/EN 60529 standard
- Maximum energy limitation (Class 3 per IEC 60898-1) with current limiting capability
- DIN rail mounting with dual clamps allowing independent removal without power disruption
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories
- Label holder for circuit identification and on/off indication with red/green backgrounds
- Accepts copper cable, prong busbar, fork busbar, or Legrand HX3 plug busbar connection
- Halogen-free, environmentally conscious design with substance-restriction compliance
- Operating temperature range -25°C to 70°C with 50-60Hz frequency operation
Technical Specifications
| Specification |
Value |
| Product Type | Thermal Magnetic Circuit Breaker |
| Number of Poles | 4 poles total with 4 protected poles |
| Rated Current | 4 Amperes |
| Rated Voltage | 400V AC |
| Breaking Capacity at 400V | 10,000A (10 kA) according to IEC 60898-1 |
| Breaking Capacity at 230V | 16 kA (Icn) / 32 kA (Icu) |
| Release Characteristic | B curve (3-5 In tripping threshold) |
| Rated Insulation Voltage | 500V |
| Impulse Withstand Voltage | 4 kV |
| Current Limiting Class | Class 3 (Maximum energy limitation) |
| Degree of Protection | IP20 (Fingerproof - protects against solid bodies >12.5mm) |
| Mounting Method | DIN rail with dual clamps (top and bottom) |
| Built-in Depth | 44 mm |
| Width | 70.8 mm (4 modular spacings) |
| Height | 94.8 mm |
| Overall Depth | 77.8 mm |
| Connection Type | Screwed terminal |
| Connectable Conductor Cross Section (Solid-core) | 1.5-35 mm² |
| Connectable Conductor Cross Section (Multi-wired) | 1.5-25 mm² |
| Supply Direction | By top or bottom |
| Frequency | 50-60 Hz |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Pollution Degree | 2 |
| Impact Strength Rating | IK02 |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Concurrent Switching of Neutral | Yes |
| Flush-mounted Installation | Yes |
| Additional Equipment Possible | Yes (Auxiliaries, RCD modules, accessories) |
| Reference Number | 409061 |
| EAN Code | 3245064090612 |
| Carbon Footprint (Manufacturing) | 3.534 kg CO₂ eq. |
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