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The Live CB263C Double Pole MCB is the highest-capacity industrial-grade miniature circuit breaker in the CB series, designed to provide comprehensive protection for the most demanding single-phase circuits requiring simultaneous switching of both phase and neutral conductors while handling massive inrush currents. Rated at 63 Amps with a C-curve tripping characteristic, this 2-pole breaker represents the maximum current rating available, safeguarding both the phase and neutral conductors on AC systems up to 230/400V at 50/60Hz frequency. It features a powerful 10kA breaking capacity, making it suitable for installations with high prospective short-circuit currents near main distribution points. The C-curve characteristic (5-10x In) provides excellent protection for circuits with the largest inductive loads while accommodating the massive inrush currents typical of maximum-power industrial motors, heaviest pumps, and major industrial machinery. With its robust construction and precision thermo-magnetic release, the CB263C ensures complete circuit isolation and equipment protection for the most demanding heavy industrial applications requiring double pole switching at maximum capacity.
Complete Double Pole Protection: Simultaneously protects and switches both phase and neutral conductors, ensuring complete circuit isolation during fault conditions and maintenance.
Maximum 63A Rating: Highest capacity in the CB series for single-phase applications up to 14.5kW.
High 10kA Breaking Capacity: Powerful fault current interruption for installations with high prospective short-circuit currents up to 10,000 amps.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (315A to 630A), specifically calibrated for circuits with the largest inductive loads and massive inrush.
Peak Capacity 63A Protection with Extreme Inductive Tolerance: Ideal for largest single-phase motors (up to 12-15HP), heaviest industrial pumps, major compressors, and heaviest industrial machinery.
Complete Isolation: Neutral pole disconnects simultaneously with phase, preventing floating neutral conditions and ensuring safety during maintenance.
Industrial Heavy-Duty Protection: Handles massive inrush currents from the largest motor-driven industrial equipment without nuisance tripping.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response on both poles.
Superior Electrical Isolation: 4000V impulse withstand rating and 500V insulation voltage for protection against voltage transients.
Extended Operational Life: 8,000 electrical operations for long-term reliability in demanding industrial environments.
Professional Installation: Standard 35mm DIN-rail mounting with IP20 finger-safe terminals and 16mm² wiring capacity.
| Specification | Details |
|---|---|
| Brand | Live |
| Series | CB |
| Model Number | CB263C |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 2 Pole (2P) - Switches Phase + Neutral |
| Current Rating (In) | 63 Amperes (Maximum series rating) |
| Trip Curve Type | C Curve (5-10 × In) |
| Operational Voltage | 230/400V AC |
| Rated Breaking Capacity | 10kA (10000 Amps) |
| Frequency Range | 50/60 Hertz |
| Insulation Rating (Ui) | 500 Volts |
| Impulse Withstand (Uimp) | 4000 Volts (1.2/50 µs) |
| Dielectric Test Voltage | 2kV for 60 seconds |
| Protection Mechanism | Thermo-magnetic (both poles) |
| Neutral Pole Protection | Fully protected and switched |
| Operating Temperature | -5°C to +40°C (daily average ≤35°C) |
| Calibration Reference | 30°C |
| Storage Temperature | -25°C to +70°C |
| Electrical Lifespan | 8,000 cycles |
| Protection Class | IP20 |
| Terminal Capacity | Up to 16 mm² |
| Mounting Type | DIN Rail (35mm) |
| Standards | BS IEC/EN 60898 |
1. What specific heavy industrial applications require the maximum 63A C-Curve double pole MCB?
Largest single-phase motors up to 12-15HP (9-11kW), heaviest industrial pumps, major air compressors, large industrial extruders, heavy-duty conveyor systems, and major machine tool main drives requiring maximum capacity with neutral switching.
2. Can this 63A C-Curve breaker handle a 10kW industrial motor?
Yes, it's ideally suited for 10kW motors. The C-Curve tolerates starting currents up to 600-700A (6-7x FLC) while the 63A maximum rating provides excellent running protection without nuisance tripping.
3. What is the advantage of double pole at maximum 63A capacity?
Double pole provides complete isolation of both phase and neutral at maximum power levels, essential for safe maintenance of heavy industrial machinery per IEC 60204, especially where multiple power sources may be present.
4. Why choose C-Curve over B-Curve for 63A maximum capacity motor circuits?
C-Curve (5-10x In) handles starting currents up to 630A where B-Curve (3-5x In) would trip at 315A, making C-Curve essential for the largest industrial motors with very high locked-rotor currents.
5. What cable size is mandatory for 63A maximum capacity C-Curve industrial circuits?
16mm² copper conductor MANDATORY - this matches the maximum terminal capacity. For runs over 15m, external termination with 25mm² or 35mm² is required. Never use smaller cable for 63A circuits.
