Legrand DX³ 2-pole 63A C-curve modular circuit breaker with 36kA breaking capacity, IP20 finger-safe terminals, and full compatibility with DX³ range accessories for reliable electrical circuit protection and isolation.
The Legrand DX³ MCB 2P 63A Curve C is a modular bipolar thermal-magnetic circuit breaker designed for reliable control, protection, and isolation of electrical circuits. This professional-grade device offers exceptional breaking capacity of 36kA at 400V and features a C-curve protection characteristic with tripping thresholds between 315A and 630A (5-10 times the rated current), making it ideal for general purpose applications with moderate inrush currents. The breaker is equipped with IP20 finger-safe terminals, a label holder for circuit identification, and a red/green mechanical indicator displaying the contact status. Its compact 3-module width design (53.4mm) ensures efficient DIN rail mounting, while the halogen-free construction demonstrates environmental responsibility.
This circuit breaker is fully compatible with the DX³ range of auxiliaries, RCD add-on modules, and accessories, allowing for flexible system configurations. The device can be supplied from either the top or bottom with copper cables and features screwed terminals supporting multi-wired conductors (1.5-35mm²) and solid-core conductors (1.5-50mm²). With a rated voltage of 400V AC and insulation voltage of 500V, the breaker maintains reliable operation across ambient temperatures from -25°C to +70°C. The product meets all relevant safety standards including IEC 60947-2 and IEC/EN 60529, ensuring compliance with installation regulations and providing protection against solid bodies larger than 12.5mm.
Designed for installation in compliance with electrical safety standards, this Legrand circuit breaker represents the pinnacle of European electrical engineering excellence. Its robust construction, combined with advanced thermal-magnetic protection mechanisms, ensures optimal safety and reliability in both residential and small commercial applications. The halogen-free design and low carbon footprint (3.549 kg CO₂ eq.) reflect Legrand's commitment to sustainable manufacturing practices.
Key Features
- 36kA breaking capacity at 400V according to IEC 60947-2 standard
- C-curve thermal-magnetic protection with tripping threshold 315A-630A (5-10 times rated current)
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm
- Red/green mechanical indicator displaying open/closed contact status
- Full compatibility with Legrand DX³ auxiliaries, RCD modules and accessories
- Halogen-free environmentally conscious design with 3.549 kg CO₂ eq. carbon footprint
- DIN rail mounted with 3-module width (53.4mm) for compact installation
- Supports copper cable supply from top or bottom with screwed terminals
- Rated voltage 400V AC with 500V insulation voltage and 6kV impulse withstand
- Operating temperature range -25°C to +70°C with storage range -40°C to +70°C
Technical Specifications
| Specification |
Value |
| Product Type | Modular Bipolar Thermal-Magnetic Circuit Breaker |
| Rated Current | 63 A |
| Number of Poles | 2 poles (Bipolar) |
| Release Characteristic | C-curve (5-10 In) |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 400V | 36 kA (Icu) |
| Breaking Capacity at 230V | 72 kA (Icu) |
| Short-Circuit Tripping Threshold | 315A - 630A |
| Degree of Protection | IP20 (Finger-safe) |
| Degree of Impact Strength | IK02 |
| Module Width | 3 modular spacings (53.4 mm) |
| Built-in Depth | 47 mm |
| Dimensions (W × H × D) | 53.4 × 127.5 × 79.2 mm |
| Weight | Approximately 150 grams |
| Mounting Method | DIN rail (35mm standard) |
| Connection Type | Screwed terminals |
| Connectable Conductor (Multi-wired) | 1.5 - 35 mm² |
| Connectable Conductor (Solid-core) | 1.5 - 50 mm² |
| Supply Direction | Top or bottom |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360 - 440 V |
| Frequency Range | 50 - 60 Hz |
| Pollution Degree | 3 |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral | No |
| Additional Equipment | Compatible with DX³ auxiliaries and RCD modules |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Carbon Footprint (Manufacturing) | 3.549 kg CO₂ eq. |
| Reference Number | 410014 |
| EAN Code | 3245064100144 |
| Standards Compliance | IEC 60947-2, IEC/EN 60529, RoHS Directive |
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