Legrand DX3 three-pole 20A circuit breaker with 25kA breaking capacity, D-curve tripping, IP20 terminals, and DIN rail mounting for reliable electrical circuit protection
The Legrand DX³ is a three-pole modular thermal-magnetic circuit breaker designed for control, protection, and isolation of electrical circuits in residential and small commercial applications. This robust device offers a 25kA breaking capacity at 400V with D-curve tripping characteristics, making it ideal for circuits requiring moderate overload protection. The breaker features IP20 finger-safe terminals that comply with IEC/EN 60529 standards, ensuring safe operation in various environments. Built with a depth of 47mm and width of 80.1mm, it fits seamlessly into standard DIN rail installations.
The DX3 20A circuit breaker incorporates advanced thermal-magnetic tripping technology with a D-curve characteristic, providing tripping thresholds between 200A and 280A for short-circuit protection. The device is equipped with a red/green mechanical indicator that clearly displays the contact status (open or closed), and includes a label holder for convenient circuit identification. It supports connection via copper cable from either the top or bottom, with compatibility for multi-wired conductors (1.5-35mm²) and solid-core conductors (1.5-50mm²). The product is halogen-free and designed with environmental consciousness, complying with substance-restriction requirements.
This circuit breaker can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for enhanced functionality. Operating across a nominal voltage range of 360-440V at 50-60Hz frequency, it maintains reliable performance in ambient temperatures from -25°C to 70°C. The device is manufactured to the highest standards with an IK02 degree of impact strength and pollution degree 3 rating, ensuring durability and long-term reliability in demanding electrical installations.
Key Features
- 25kA breaking capacity at 400V with D-curve tripping characteristics
- IP20 finger-safe terminals compliant with IEC/EN 60529 standards
- Red/green mechanical indicator for clear open/closed status display
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules and accessories
- Halogen-free design with environmentally conscious manufacturing process
- Supports copper cable connection from top or bottom
- Accepts multi-wired (1.5-35mm²) and solid-core (1.5-50mm²) conductors
- DIN rail mounting with 4.5 modular spacing width
- Operating temperature range -25°C to 70°C with reliable performance
- Integrated label holder for convenient circuit identification
Technical Specifications
| Specification |
Value |
| Product Type | Three-pole Modular Circuit Breaker |
| Rated Current | 20 Amperes |
| Breaking Capacity | 25 kA at 400V, 50 kA at 230V |
| Tripping Characteristic | D-curve (200-280A short-circuit threshold) |
| Rated Voltage | 400V AC |
| Insulation Voltage | 500V |
| Impulse Withstand Voltage | 6 kV |
| Frequency | 50-60 Hz |
| Number of Poles | 3 poles (3 protected poles) |
| Built-in Depth | 47 mm |
| Width | 80.1 mm |
| Height | 127.5 mm |
| Modular Spacing | 4.5 spaces |
| Protection Degree | IP20 (Finger-safe) |
| Impact Strength | IK02 |
| Pollution Degree | 3 |
| Conductor Cross Section (Multi-wired) | 1.5-35 mm² |
| Conductor Cross Section (Solid-core) | 1.5-50 mm² |
| Connection Type | Screwed terminal, Cable connection |
| Supply Direction | Top or bottom |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +70°C |
| Nominal Voltage Range | 360-440V |
| Mounting Method | DIN rail |
| Color | Grey (RAL 7035) |
| Material Composition | Halogen-free |
| Reference Number | 409834 |
| EAN Code | 3245064098342 |
| Carbon Footprint | 5.448 kg CO2 eq. (Manufacturing phase) |
| Concurrent Switching of Neutral | No |
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