Single-pole 63A miniature circuit breaker with B curve characteristic, 6000A breaking capacity, IP20 protection, and DIN rail mounting for reliable household and commercial electrical protection.
The Legrand RX3 MCB (Miniature Circuit Breaker) is a single-pole 63A circuit breaker with curve B characteristic, designed for household and small commercial electrical installations. This device provides reliable protection against short-circuits and overloads with a breaking capacity of 6000A according to IEC 60898-1 standard. The RX3 series offers superior performance with current limiting class 3, ensuring maximum limitation of let-through energy during fault conditions. With an IP20 protection rating, this breaker is fingerproof and protected against solid bodies larger than 12.5mm, making it safe for residential environments.
The MCB RX3 features flexible connection options including copper cable, prong busbar (top or bottom side), or fork busbar (bottom side) for versatile installation in various panel configurations. Built to strict environmental standards, this product complies with substance-restriction requirements and has been designed through an environmentally conscious manufacturing process. The device operates reliably across 50-60 Hz frequencies with rated voltage of 230V AC and impulse withstand voltage of 4kV, providing comprehensive protection for modern electrical systems.
Installation should be performed by qualified electricians in compliance with local electrical codes and regulations. The RX3 MCB is designed for DIN rail mounting with a compact depth of 44mm and single modular spacing width of 17.7mm, allowing efficient use of panel space. This circuit breaker represents the perfect balance between reliability, safety, and cost-effectiveness for residential and small commercial applications.
Key Features
- 6000A breaking capacity compliant with IEC 60898-1 standard for household installations
- B-curve tripping characteristic with short-circuit threshold between 189A and 315A (3-5 In)
- Current limiting class 3 for maximum let-through energy limitation during faults
- IP20 protection rating - fingerproof and protected against solid bodies larger than 12.5mm
- Flexible connection options: copper cable, prong busbar, or fork busbar
- Compact DIN rail mounting with 44mm depth and single modular spacing
- Environmentally conscious design compliant with substance-restriction requirements
- Rated voltage 230V AC with 4kV impulse withstand voltage
- Operates reliably across 50-60 Hz frequency range
- Gray color (RAL 7035) for professional appearance in electrical panels
Technical Specifications
| Specification |
Value |
| Product Type | Miniature Circuit Breaker (MCB) |
| Number of Poles | 1 pole (single-pole) |
| Rated Current | 63 Amperes |
| Release Characteristic | B curve (189A - 315A tripping range) |
| Breaking Capacity | 6000A at 230V AC (Icn and Icu) |
| Rated Voltage | 230V AC |
| Rated Insulation Voltage | 500V |
| Impulse Withstand Voltage | 4 kV |
| Current Limiting Class | Class 3 (maximum energy limitation) |
| Frequency Range | 50-60 Hz |
| Protection Degree (IP Rating) | IP20 (fingerproof, protected against solid bodies >12.5mm) |
| Impact Strength Degree | IK02 |
| Width (Modular Spacings) | 1 module (17.7mm) |
| Height | 88.5mm |
| Depth | 77.8mm (built-in depth: 44mm) |
| Mounting Method | DIN rail mounting |
| Connection Type | Screwed terminal, busbar and cable |
| Electric Supply Direction | Top or bottom supply |
| Color | Gray (RAL 7035) |
| Storage Temperature Range | -40°C to +70°C |
| Nominal Voltage Range | 210-250V AC |
| Pollution Degree | 2 |
| Flush-Mounted Installation | Yes |
| Neutral Conductor Switching | No (load side only) |
| Reference Number | 419142 |
| EAN Code | 3414970366900 |
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