Professional three-pole miniature circuit breaker with 25A rating, 6000A breaking capacity, and B curve protection. Ideal for residential and commercial electrical installations with advanced current limiting and IP20 protection.
The Legrand RX3 MCB (Miniature Circuit Breaker) is a high-performance three-pole circuit breaker designed for residential and small commercial electrical installations. With a rated current of 25A and a breaking capacity of 6000A at 400V, this device provides reliable protection against overcurrent and short-circuit faults. The B curve characteristic offers a tripping threshold between 75A and 125A (3-5 times the rated current), making it ideal for general-purpose circuits with moderate inrush currents.
This circuit breaker features advanced current limiting technology (Class 3) that minimizes let-through energy during fault conditions, protecting downstream equipment from damage. The device is IP20 rated, providing protection against solid bodies larger than 12.5mm, making it suitable for standard indoor installations. With a rated voltage of 400V and insulation voltage of 500V, it meets international standards IEC 60898-1 and IEC 60947-2, ensuring compatibility with modern electrical systems.
The RX3 breaker can be supplied with multiple connection options including copper cables, prong busbars, or fork busbars for flexible installation configurations. Its compact design with dimensions of 53.1mm width and 77.8mm depth allows for efficient space utilization in distribution panels. The device is halogen-free and complies with substance-restriction requirements, demonstrating Legrand's commitment to environmental responsibility and safety.
Key Features
- Three-pole configuration for three-phase circuit protection
- 25A rated current with B curve tripping characteristic (75-125A)
- 6000A breaking capacity at 400V per IEC 60898-1 standard
- Advanced Class 3 current limiting technology for energy limitation
- IP20 protection rating against solid bodies larger than 12.5mm
- Multiple connection options: copper cable, prong busbar, or fork busbar
- Compact DIN rail mounting design (53.1mm x 88.5mm x 77.8mm)
- Rated voltage 400V with 500V insulation voltage
- Halogen-free and environmentally conscious design
- Terminal marking indication for easy identification
Technical Specifications
| Specification |
Value |
| Number of Poles | 3 poles (three-phase) |
| Rated Current | 25A |
| Release Characteristic | B curve (75-125A tripping threshold) |
| Breaking Capacity at 400V | 6000A (Icn and Icu per IEC 60898-1) |
| Breaking Capacity at 230V | 10000A (Icn and Icu per IEC 60898-1) |
| Rated Voltage | 400V AC |
| Insulation Voltage | 500V |
| Impulse Withstand Voltage | 4kV |
| Current Limiting Class | Class 3 |
| Frequency | 50-60 Hz |
| Protection Degree | IP20 |
| Impact Strength | IK02 |
| Width | 53.1mm (3 modular spacings) |
| Height | 88.5mm |
| Depth | 77.8mm (built-in depth: 44mm) |
| Color | Grey (RAL 7035) |
| Connection Type | Screwed terminal, Busbar and cable |
| Mounting Method | DIN rail |
| Pollution Degree | 2 |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 360-440V |
| Supply Direction | Top or bottom |
| Halogen Free | No |
| Reference Number | 419171 |
| EAN Code | 3414970367334 |
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