Legrand DX3 modular bipolar thermal-magnetic circuit breaker with 40A rating, 50kA breaking capacity at 400V, C curve tripping, and IP20 fingerproof terminals for reliable electrical circuit protection and isolation.
The Legrand DX3 MCB is a modular bipolar thermal-magnetic circuit breaker designed for control, protection, and isolation of electrical circuits. This advanced protective device features a 50kA breaking capacity at 400V and delivers reliable performance with C curve tripping characteristics. The breaker is equipped with visible breaking contacts for clear status indication and fingerproof IP20 terminals that comply with IEC/EN 60529 standards. With a rated current of 40A and rated voltage of 400V, this circuit breaker provides comprehensive protection for residential and small commercial electrical installations. The device features a mechanical red/green indicator that clearly displays whether contacts are open or closed, along with a convenient label holder for circuit identification.
This DX3 circuit breaker is constructed with environmental consciousness and complies with substance-restriction requirements. It operates reliably across a wide ambient temperature range from -25°C to 70°C and can accommodate both solid-core conductors (1.5-50mm²) and multi-wired conductors (1.5-35mm²). The device is compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories, making it highly versatile for different installation configurations. Installation can be performed from the top or bottom, and the breaker mounts securely on DIN rails with a width of 53.4mm and depth of 79.2mm.
The breaking capacity reaches 100kA at 230V and 50kA at 400V according to IEC 60947-2 standards, with a tripping threshold for short-circuit currents between 200A and 400A (C curve between 5In and 10In). The device is halogen-free and environmentally friendly, with a carbon footprint of 3.549 kg CO2 equivalent during the manufacturing phase. All installations should be performed by qualified electricians in compliance with local electrical codes and installation rules to ensure optimal safety and performance.
Key Features
- 50kA breaking capacity at 400V with 100kA at 230V per IEC 60947-2 standard
- C curve tripping characteristic with 200-400A short-circuit threshold (5In to 10In)
- IP20 fingerproof terminals protected against solid bodies larger than 12.5mm
- Visible breaking contacts with red/green mechanical status indicator for clear identification
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories
- Wide operating temperature range from -25°C to 70°C with halogen-free construction
- Accepts both solid-core (1.5-50mm²) and multi-wired (1.5-35mm²) conductor connections
- DIN rail mounting with integrated label holder for convenient circuit identification
- Top or bottom electrical supply connection for flexible installation configurations
- Environmentally conscious design with 3.549 kg CO2 equivalent manufacturing footprint
Technical Specifications
| Specification |
Value |
| Product Type | Modular Bipolar Thermal-Magnetic Circuit Breaker |
| Rated Current | 40 Amperes |
| Rated Voltage | 400 Volts AC |
| Rated Insulation Voltage | 500 Volts |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 100 kA (Icu) |
| Breaking Capacity at 400V | 50 kA (Icu) |
| Tripping Characteristic | C Curve |
| Short-Circuit Threshold | 200-400A (5In to 10In) |
| Number of Poles | 2 Poles |
| Protected Poles | 2 |
| Degree of Protection | IP20 (Fingerproof) |
| Degree of Impact Strength | IK02 |
| Built-in Depth | 47 mm |
| Width | 53.4 mm |
| Height | 127.5 mm |
| Overall Depth | 79.2 mm |
| Modular Width | 3 Module Spaces |
| Solid-Core Conductor Range | 1.5-50 mm² |
| Multi-Wired Conductor Range | 1.5-35 mm² |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440 Volts |
| Frequency | 50-60 Hz |
| Pollution Degree | 3 |
| Voltage Type | AC |
| Connection Type | Screwed Terminal with Cable Connection |
| Supply Connection Direction | Top or Bottom |
| Mounting Method | DIN Rail |
| Flush-Mounted Installation | Yes |
| Concurrently Switching Neutral | No |
| Additional Equipment Possible | Yes (Auxiliaries, RCD modules, Accessories) |
| Color | Grey |
| RAL Color Number | 7035 |
| Halogen Free | Yes |
| Explosion-Proof | No |
| Label Space Available | Yes |
| Mechanical Indicator | Red/Green Status Display |
| Carbon Footprint (Manufacturing) | 3.549 kg CO2 equivalent |
| Reference Number | 410152 |
| EAN Code | 3245064101523 |
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