Professional three-pole 100A modular circuit breaker with 25kA breaking capacity, C-curve characteristic, IP20 finger-safe design, and DIN rail mounting for residential and commercial electrical protection.
The Legrand DX3 three-pole modular thermal-magnetic circuit breaker is a professional-grade electrical protection device designed for control, protection, and isolation of electrical circuits in residential and small commercial applications. This robust breaker offers exceptional 25kA breaking capacity at 400V AC and features a C-curve characteristic with a tripping threshold between 500A and 1000A (5-10 In range), making it ideal for circuits with moderate inrush currents. The device incorporates IP20 finger-safe design protection according to IEC/EN 60529 standards, ensuring safe operation in DIN rail installations.
Built with precision engineering, the DX3 circuit breaker features a red/green mechanical indicator that clearly displays the open or closed status of the contacts, along with a convenient label holder for circuit identification. The unit is constructed from halogen-free materials and complies with substance-restriction requirements, reflecting Legrand's commitment to environmental sustainability. With a built-in depth of 47mm and occupying 4.5 modular spacings, it integrates seamlessly into standard electrical panels while maintaining compact dimensions of 80.1mm width, 127.5mm height, and 79.2mm depth.
This circuit breaker is fully compatible with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories, allowing for flexible system configurations. It accommodates both multi-wired conductors (6-50mm²) and solid-core conductors (6-70mm²), with supply capability from either top or bottom terminals. Operating reliably across a wide ambient temperature range of -25 to 70°C and with a storage temperature capability of -40 to 70°C, the DX3 ensures consistent performance in diverse environmental conditions.
Key Features
- 25kA breaking capacity at 400V AC with C-curve characteristic (500A-1000A tripping threshold)
- IP20 finger-safe design protection for secure DIN rail installation and safe operation
- Red/green mechanical indicator displaying clear open/closed contact status
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and comprehensive accessories
- Halogen-free construction with environmentally conscious design and RoHS compliance
- Accepts both multi-wired (6-50mm²) and solid-core (6-70mm²) conductor connections
- Top or bottom terminal supply flexibility for versatile panel installation
- Wide operating temperature range -25 to 70°C with storage capability to -40 to 70°C
- Built-in label holder for convenient circuit identification and organization
- Compact 4.5 modular spacing footprint for efficient panel space utilization
Technical Specifications
| Specification |
Value |
| Product Type | Three-Pole Modular Thermal-Magnetic Circuit Breaker |
| Rated Current | 100A |
| Rated Voltage | 400V AC |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 6kV |
| Breaking Capacity at 400V | 25kA (Icu) |
| Breaking Capacity at 230V | 50kA (Icu) |
| Release Characteristic | C Curve (5-10 In tripping range) |
| Number of Poles | 3 poles (3 protected poles) |
| Degree of Protection | IP20 (Finger-safe) |
| Degree of Impact Strength | IK02 |
| Built-in Depth | 47mm |
| Width | 80.1mm |
| Height | 127.5mm |
| Depth | 79.2mm |
| Modular Spacing | 4.5 modules |
| Connectable Conductor Cross Section (Multi-wired) | 6-50mm² |
| Connectable Conductor Cross Section (Solid-core) | 6-70mm² |
| Connection Type | Screwed Terminal and Cable |
| Supply Direction | Top or Bottom |
| Mounting Method | DIN Rail |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral Conductor | No |
| Frequency Range | 50-60Hz |
| Operating Temperature Range | -25 to +70°C |
| Storage Temperature Range | -40 to +70°C |
| Nominal Voltage Range | 360-440V |
| Pollution Degree | 3 |
| Additional Equipment Possible | Yes (DX3 auxiliaries, RCD add-on modules) |
| Colour | Grey (RAL 7035) |
| Halogen Free | Yes |
| Label Space/Information Surface | Yes |
| Explosion-proof | No |
| Terminal Marking Indication | No |
| Carbon Footprint (Manufacturing) | 5.808 kg CO₂ eq. |
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