Professional four-pole thermal-magnetic circuit breaker with 50kA breaking capacity, D-curve protection, and IP20 finger-safe terminals for reliable electrical circuit control and protection in residential and small commercial installations.
The Legrand DX³ four-pole modular thermal-magnetic circuit breaker (Model 410230) is a professional-grade electrical protection device designed for control, protection, and isolation of electrical circuits in residential and small commercial applications. This advanced circuit breaker delivers an impressive 50kA breaking capacity at 400V AC, providing superior short-circuit protection with D-curve characteristics. The device features IP20 finger-safe terminals, ensuring safe operation in various environments while meeting international safety standards.
This circuit breaker is equipped with a D-curve release characteristic, which means the tripping threshold for short-circuit conditions falls between 400A and 560A (10 to 14 times the rated current). The thermal-magnetic protection mechanism combines thermal overload protection with magnetic short-circuit protection, making it ideal for circuits with moderate inrush currents. The device can be supplied by copper cable from either the top or bottom side, offering flexible installation options. With a built-in depth of 47mm and width of 106.8mm (6 modular spacings), it fits standard DIN rail mounting systems.
The DX³ circuit breaker is compatible with Legrand's comprehensive range of auxiliaries, RCD add-on modules, and accessories, allowing for customized protection solutions. It features a red/green mechanical indicator displaying the open or closed status of the contacts, along with a convenient label holder for circuit identification. The device is halogen-free and complies with substance-restriction requirements, demonstrating Legrand's commitment to environmental responsibility. With a rated voltage of 400V and insulation voltage of 500V, this breaker is suitable for modern electrical installations requiring reliable and durable protection.
Key Features
- 50kA breaking capacity at 400V AC for superior short-circuit protection
- D-curve release characteristic (400-560A tripping threshold) for moderate inrush current applications
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm
- Red/green mechanical indicator displaying open/closed contact status
- Compatible with Legrand DX3 auxiliaries, RCD add-on modules, and comprehensive accessories
- Halogen-free design meeting environmental and substance-restriction requirements
- Flexible supply from top or bottom with copper or aluminum cable capability
- Built-in label holder for convenient circuit identification
- Rated for 400V with 500V insulation voltage and 6kV impulse withstand voltage
- DIN rail mounting with 6 modular spacings for standard electrical installations
Technical Specifications
| Specification |
Value |
| Product Model | DX3 410230 |
| Number of Poles | 4 poles (4 protected poles) |
| Rated Current | 40 A |
| Rated Voltage | 400 V AC |
| Release Characteristic | D-curve (400-560A tripping threshold) |
| Breaking Capacity at 400V | 50 kA (Icu according to IEC 60947-2) |
| Breaking Capacity at 230V | 100 kA (Icu according to IEC 60947-2) |
| Insulation Voltage | 500 V (Ui) |
| Impulse Withstand Voltage | 6 kV (Uimp) |
| Degree of Protection | IP20 (Finger-safe terminals) |
| Built-in Depth | 47 mm |
| Overall Dimensions | Width 106.8 mm × Height 127.5 mm × Depth 79.2 mm |
| Modular Width | 6 modular spacings |
| Impact Strength Rating | IK02 |
| Connectable Conductor Cross-Section (Solid-core) | 1.5-50 mm² |
| Connectable Conductor Cross-Section (Multi-wired) | 1.5-35 mm² |
| Connection Type | Screwed terminal |
| Mounting Method | DIN rail |
| Electric Supply Direction | Top or bottom |
| Operating Temperature Range | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Frequency | 50-60 Hz |
| Nominal Voltage Range | 360-440 V |
| Pollution Degree | 3 |
| Color | Grey (RAL 7035) |
| Halogen Free | Yes |
| Flush-mounted Installation | Yes |
| Concurrently Switching Neutral Conductor | Yes |
| Additional Equipment Possible | Yes (Legrand DX3 auxiliaries and RCD modules) |
| Label Space/Information Surface | Yes |
| EAN Code | 3245064102308 |
| Carbon Footprint (Manufacturing) | 6.991 kg CO₂ eq. |
| Compliance Standards | IEC 60947-2, IEC/EN 60529, RoHS Directive |
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