Single-pole 40A circuit breaker with C-curve protection, 6000A breaking capacity, DIN rail mounted, IP20 rated, suitable for residential and small commercial applications
The Legrand RX3 MCB (Miniature Circuit Breaker) is a single-pole electrical protection device rated at 40 amperes with a C-curve tripping characteristic, designed for household and small commercial installations. This circuit breaker provides reliable protection against overcurrent and short-circuit faults with a breaking capacity of 6000A according to IEC 60898-1 standard. The device features a compact modular design that fits on standard DIN rails, making it ideal for residential distribution panels and small commercial switchboards.
This MCB is engineered with advanced current-limiting technology (Class 3 energy limitation) that minimizes the let-through energy during fault conditions, providing superior protection for connected equipment and circuits. The breaker can be supplied via copper cables, prong busbars, or fork busbars from either the top or bottom, offering flexible installation options. With an IP20 protection rating, the device is fingerproof against solid bodies larger than 12.5mm, ensuring safe operation in various environments.
The RX3 series represents Legrand's commitment to quality, safety, and environmental responsibility. The product complies with substance-restriction requirements and has been manufactured using environmentally conscious processes. Its C-curve characteristic provides a tripping threshold between 200A and 400A (5-10 times the rated current), making it suitable for circuits with moderate inrush currents typical of residential lighting and general-purpose loads.
Key Features
- Breaking capacity of 6000A according to IEC 60898-1 standard for household installations
- C-curve tripping characteristic with threshold between 200A and 400A (5-10 In)
- Current limiting Class 3 with maximum energy limitation for superior equipment protection
- IP20 protection rating - fingerproof against solid bodies larger than 12.5mm
- Flexible supply options via copper cable, prong busbar, or fork busbar from top or bottom
- Compact modular design fitting standard DIN rail installations
- Single pole configuration (1P) rated at 40 amperes
- Rated voltage 230V AC with impulse withstand voltage of 4kV
- Environmental compliance with substance-restriction requirements
- Terminal marking indication for easy circuit identification
Technical Specifications
| Specification |
Value |
| Product Type | Miniature Circuit Breaker (MCB) |
| Number of Poles | 1 (Single Pole) |
| Rated Current | 40 Amperes |
| Release Characteristic | C-curve (200-400A) |
| Rated Voltage | 230V AC |
| Breaking Capacity (Icn) | 6000A at 230V according to IEC 60898-1 |
| Breaking Capacity (Icu) | 6000A at 230V according to IEC 60947-2 |
| Rated Insulation Voltage (Ui) | 500V |
| Impulse Withstand Voltage (Uimp) | 4kV |
| Current Limiting Class | Class 3 |
| Frequency Range | 50-60 Hz |
| Protection Degree (IP) | IP20 |
| Impact Strength (IK) | IK02 |
| Width | 17.7mm (1 modular spacing) |
| Height | 88.5mm |
| Depth | 44mm (built-in), 77.8mm (total) |
| Color | Grey (RAL 7035) |
| Connection Type | Screwed terminal, Busbar and cable |
| Supply Direction | Top or bottom |
| Mounting Method | DIN rail |
| Pollution Degree | 2 |
| Nominal Voltage Range | 210-250V |
| Storage Temperature Range | -40°C to +70°C |
| Halogen Free | No |
| Terminal Marking | Yes |
| Flush-mounted Installation | Yes |
| Neutral Conductor Switching | No |
| Additional Equipment Possible | No |
| Reference Number | 419206 |
| EAN Code | 3414970367648 |
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