Professional-grade 4-pole circuit breaker with 50kA breaking capacity, C curve protection, and IP20 finger-safe terminals for reliable electrical circuit protection in residential and commercial applications.
The Legrand DX³ four-pole modular thermal-magnetic circuit breaker is a professional-grade electrical protection device designed for control, protection, and isolation of electrical circuits. This advanced circuit breaker features a fully visible breaking mechanism and delivers exceptional performance with a 50kA breaking capacity at 400V~, making it ideal for residential and small commercial panel applications. The C curve tripping characteristic provides optimal protection with a tripping threshold between 80A and 160A (5 In to 10 In), ensuring reliable circuit protection against overloads and short circuits.
This circuit breaker is engineered with IP20 finger-safe terminals that protect against solid bodies larger than 12.5mm, complying with IEC/EN 60529 standards. The device 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. With a built-in depth of 47mm and width of 106.8mm, it fits seamlessly into standard DIN rail installations. The DX³ can be supplied by copper cable from either the top or bottom, and supports connectable conductor cross-sections ranging from 1.5 to 50mm² for solid-core cables and 1.5 to 35mm² for multi-wired cables.
Designed with environmental consciousness, this product is halogen-free and complies with substance-restriction requirements. It operates reliably across ambient temperatures from -25°C to 70°C and maintains performance at nominal voltages between 360V and 440V. The circuit breaker is fully compatible with Legrand DX³ auxiliaries, RCD add-on modules, and accessories, providing flexible system integration. With its robust construction, advanced protection features, and professional design, the Legrand DX³ circuit breaker is the preferred choice for reliable electrical circuit protection in modern installations.
Key Features
- 50kA breaking capacity at 400V with C curve tripping characteristic (80A-160A threshold)
- IP20 finger-safe terminals protecting against solid bodies larger than 12.5mm per IEC/EN 60529
- Red/green mechanical indicator displaying open/closed contact status
- Fully visible breaking mechanism with clear circuit identification label holder
- Compatible with Legrand DX³ auxiliaries, RCD add-on modules, and system accessories
- Halogen-free design with environmentally conscious construction
- Supports both top and bottom copper cable supply connections
- Wide conductor cross-section compatibility (1.5-50mm² solid, 1.5-35mm² multi-wired)
- Operates reliably across -25°C to 70°C ambient temperature range
- DIN rail mounted with compact 47mm built-in depth
Technical Specifications
| Specification |
Value |
| Product Type | Four-Pole Modular Thermal-Magnetic Circuit Breaker |
| Rated Current | 16 A |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 500 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Breaking Capacity at 230V | 100 kA (Icu) |
| Breaking Capacity at 400V | 50 kA (Icu) |
| Release Characteristic | C Curve (5 In to 10 In) |
| Number of Poles | 4 Poles (4 Protected) |
| Degree of Protection | IP20 (Finger-Safe) |
| Frequency Range | 50-60 Hz |
| Built-in Depth | 47 mm |
| Width | 106.8 mm |
| Height | 127.5 mm |
| Overall Depth | 79.2 mm |
| Modular Width | 6 Modular Spacings |
| Impact Strength Rating | IK02 |
| Nominal Voltage Range | 360-440 V |
| Ambient Operating Temperature | -25°C to +70°C |
| Storage Temperature Range | -40°C to +70°C |
| Solid-Core Conductor Cross-Section | 1.5-50 mm² |
| Multi-Wired Conductor Cross-Section | 1.5-35 mm² |
| Connection Type | Screwed Terminal with Cable Connection |
| Supply Direction | Top or Bottom |
| Mounting Method | DIN Rail |
| Pollution Degree | 3 |
| Concurrently Switching Neutral | Yes |
| Flush-Mounted Installation | Yes |
| Additional Equipment Possible | Yes |
| Halogen-Free | Yes |
| Color | Grey (RAL 7035) |
| Carbon Footprint (Manufacturing) | 6.568 kg CO₂ eq. |
| Reference Number | 410174 |
| EAN Code | 3245064101745 |
| Warranty | Legrand Standard Warranty |
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