Legrand RX3 2-pole 20A miniature circuit breaker with 4500A breaking capacity, C-curve protection, and advanced current limiting technology for residential and commercial electrical installations.
The Legrand RX3 MCB (Miniature Circuit Breaker) is a high-performance 2-pole circuit breaker designed for residential and small commercial electrical installations. With a rated current of 20A and a breaking capacity of 4500A according to IEC 60898-1 standard, this device provides superior protection against overloads and short circuits. The breaker features a C-curve characteristic with a tripping threshold between 100A and 200A (5 In to 10 In), making it ideal for protecting circuits with moderate inrush currents typical in residential applications.
The RX3 series offers advanced current limiting technology with class 3 energy limitation, ensuring minimal let-through energy during fault conditions. The device is rated for 400V AC operation at 50-60Hz frequency and features a compact design with a 44mm built-in depth, making it suitable for standard DIN rail mounting in distribution panels. The breaker is IP20 rated with IK04 impact strength, providing fingerproof protection against solid bodies larger than 12.5mm, and complies with all RoHS and environmental regulations.
This circuit breaker can be supplied with either copper cable or prong busbar connections from the top or bottom, offering flexible installation options. The grey colored housing (RAL 7035) with halogen-free materials ensures durability and environmental compliance. The RX3 series is backed by comprehensive certifications including CEBEC, VDE, and OC/CB standards, making it a reliable choice for modern electrical installations requiring robust overcurrent protection.
Key Features
- Breaking capacity of 4500A according to IEC 60898-1 standard for household installations
- C-curve tripping characteristic with threshold between 100A and 200A (5 In to 10 In)
- Advanced current limiting class 3 technology for minimal let-through energy
- IP20 rated protection against solid bodies larger than 12.5mm with IK04 impact strength
- Flexible connection options with copper cable or prong busbar from top or bottom
- Compact 44mm built-in depth suitable for standard DIN rail mounting
- Halogen-free materials with RoHS and environmental compliance
- Multiple certification standards including CEBEC, VDE, and OC/CB
Technical Specifications
| Specification |
Value |
| Product Type | Miniature Circuit Breaker (MCB) |
| Number of Poles | 2 poles |
| Rated Current | 20 A |
| Rated Voltage | 400 V AC |
| Rated Insulation Voltage | 400 V |
| Breaking Capacity (Icn) at 230V | 6 kA according to EN 60898 |
| Breaking Capacity (Icn) at 400V | 4.5 kA according to EN 60898 |
| Ultimate Breaking Capacity (Icu) at 230V | 6 kA according to IEC 60947-2 |
| Ultimate Breaking Capacity (Icu) at 400V | 4.5 kA according to IEC 60947-2 |
| Trip Characteristic | C curve (100A-200A or 5 In-10 In) |
| Current Limiting Class | Class 3 |
| Impulse Withstand Voltage | 4 kV |
| Frequency Range | 50-60 Hz |
| Built-in Depth | 44 mm |
| Width | 34.6 mm |
| Height | 88.8 mm |
| Total Depth | 77.3 mm |
| Modular Width | 2 spaces |
| Degree of Protection (IP) | IP20 |
| Impact Strength (IK) | IK04 |
| Color | Grey (RAL 7035) |
| Connection Type | Screwed terminal, Busbar and cable |
| Electric Supply Direction | By top or bottom |
| Mounting Method | DIN rail |
| Flush-mounted Installation | Yes |
| Neutral Conductor Switching | No |
| Pollution Degree | 2 |
| Nominal Voltage Range | 360-440 V |
| Storage Temperature Range | -25 to 60°C |
| Halogen Free | Yes |
| SKU | 419698 |
| EAN Code | 3414970368805 |
| Warranty | Covered by Legrand standard warranty and certifications |
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