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The Live CB163D Single Pole MCB is the highest-capacity and most powerful miniature circuit breaker in the CB series, engineered to provide robust protection for the most demanding maximum-power single-phase electrical circuits with extreme inrush currents. Rated at 63 Amps with a D-curve tripping characteristic, this 1-pole breaker represents the maximum current rating available, safeguarding the phase conductor on AC systems up to 230V 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 D-curve characteristic (10-20x In) is specifically designed for applications with massive momentary startup currents at maximum power levels, ensuring the breaker tolerates these extreme surges while maintaining full protection against overloads and short circuits. With its rugged construction and precision thermo-magnetic release, the CB163D ensures equipment protection and operational safety for the most demanding heavy industrial applications at maximum capacity.
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.
D-Curve Characteristic: Trips instantaneously at 10-20 times rated current (630A to 1260A), specifically engineered for applications with extreme inrush currents at maximum power.
Peak Capacity 63A Protection with Extreme Surge Tolerance: Ideal for the largest single-phase industrial motors, heaviest transformers, massive welding equipment, and heaviest machinery with extreme startup currents.
Single Pole Configuration: Protects one phase conductor for single-phase 230V heavy industrial circuits at maximum capacity.
Industrial Heavy-Duty Focus: Prevents nuisance tripping where standard B/C curves would fail due to extreme inrush from the heaviest industrial equipment.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response.
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 | CB163D |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 1 Pole (1P) |
| Current Rating (In) | 63 Amperes (Maximum series rating) |
| Trip Curve Type | D Curve (10-20 × 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 |
| 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 D-Curve single pole capacity?
Largest punch presses (20HP+), heaviest industrial compressors, massive injection molding machines, industrial braking systems for heavy machinery, and largest conveyor drives with startup surges exceeding 1000A.
2. How does the 1260A surge tolerance benefit the largest motor starting?
A 20HP single-phase motor can draw 900-1100A during locked rotor conditions. The 1260A magnetic trip threshold prevents nuisance tripping during this critical startup phase while maintaining fault protection.
3. What is the maximum transformer capacity this 63A D-Curve can support?
Suitable for the largest isolation transformers up to 20kVA and heaviest welding transformers up to 25kVA, handling the massive magnetizing inrush (up to 25x normal current) during energization.
4. What are the critical cable requirements for 63A maximum capacity D-Curve 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.
5. Why is 10kA breaking capacity critical for 63A D-Curve industrial applications at maximum capacity?
63A D-Curve breakers are typically installed in heavy industrial settings nearest to main transformers where fault currents can reach 10kA. This maximum rating ensures the breaker can safely interrupt highest fault current without catastrophic failure.
