Legrand DX3 3-pole 16A D-curve circuit breaker with 25kA breaking capacity, IP20 finger-safe terminals, DIN-rail mounting, and advanced thermal-magnetic protection for residential and commercial electrical systems.
The Legrand DX3 3-pole modular thermal-magnetic circuit breaker (REF. 409833) is a high-performance electrical protection device designed for residential and small commercial applications. This circuit breaker delivers an exceptional 25kA breaking capacity at 400V AC and provides reliable 16A D-curve protection for three-phase electrical systems. The device features IP20 finger-safe terminals that prevent accidental contact with live components, ensuring enhanced safety in installation environments. With DIN-rail mounting capability, this circuit breaker integrates seamlessly into modern electrical distribution panels and switchboards.
The DX3 circuit breaker combines advanced thermal-magnetic technology with practical design features that make it ideal for comprehensive circuit protection. The D-curve characteristic provides tripping thresholds between 160A and 224A (10 to 14 times the rated current), making it suitable for circuits with moderate inrush currents. The device incorporates a red/green mechanical indicator that clearly displays the status of the contacts (open or closed), and includes a convenient label holder for circuit identification. Built-in depth of 47mm and modular spacing of 4.5 units ensure efficient panel space utilization.
This product complies with IEC 60947-2 standards and meets all substance-restriction requirements while being designed with environmental consciousness. The circuit breaker can be equipped with Legrand DX3 auxiliaries, RCD add-on modules, and various accessories for expanded functionality. It features halogen-free construction, rated impulse withstand voltage of 6kV, and operates reliably across a wide temperature range from -25°C to +70°C. The carbon footprint during the manufacturing phase is 5.670 kgCO2eq, reflecting Legrand's commitment to sustainable production practices.
Key Features
- 25kA breaking capacity at 400V AC ensures maximum protection against short circuits
- D-curve characteristic with tripping threshold between 160A-224A (10-14 In) for moderate inrush currents
- IP20 finger-safe terminals prevent accidental contact with live components
- Red/green mechanical indicator displays open/closed contact status clearly
- DIN-rail mounting with 4.5 modular spacing for efficient panel integration
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and accessories
- Halogen-free construction with environmental consciousness
- Rated impulse withstand voltage of 6kV for surge protection
- Wide operating temperature range from -25°C to +70°C
- Label holder for convenient circuit identification
Technical Specifications
| Specification |
Value |
| Product Reference | 409833 |
| EAN Code | 3245064098335 |
| Brand | Legrand |
| Product Line | DX³ (DX3) |
| Type | Modular Thermal-Magnetic Circuit Breaker |
| Number of Poles | 3 poles |
| Rated Current | 16 A |
| Release Characteristic | D curve |
| Tripping Threshold | 160A-224A (10-14 In) |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 50 kA |
| Breaking Capacity at 400V | 25 kA |
| Frequency Range | 50-60 Hz |
| Voltage Type | AC |
| Degree of Protection | IP20 (finger-safe) |
| Impact Strength Rating | IK02 |
| Pollution Degree | 3 |
| Built-in Depth | 47 mm |
| Width | 80.1 mm |
| Height | 127.5 mm |
| Depth | 79.2 mm |
| Modular Width | 4.5 modular spacings |
| Mounting Method | DIN rail |
| Flush-Mounted Installation | Yes |
| Connectable Conductor Cross Section (Solid-Core) | 1.5-50 mm² |
| Connectable Conductor Cross Section (Multi-Wired) | 1.5-35 mm² |
| Connection Type | Screwed terminal, Cable |
| Supply Direction | Top or bottom |
| Neutral Conductor Switching | No |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440 V |
| Color | Grey |
| RAL Number | 7035 |
| Halogen Free | Yes |
| Additional Equipment Possible | Yes (DX3 auxiliaries, RCD modules, accessories) |
| Label Space | Yes |
| Mechanical Indicator | Red/Green status display |
| Explosion-Proof | No |
| Carbon Footprint (Manufacturing) | 5.670 kgCO₂eq |
| Standards Compliance | IEC 60947-2, IEC/EN 60529 |
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