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Suitable for indoor use.
The Live CB310C Triple Pole MCB is a versatile industrial-grade miniature circuit breaker designed to provide reliable protection for general-purpose three-phase electrical circuits with small inductive loads. Rated at 10 Amps with a C-curve tripping characteristic, this 3-pole breaker safeguards all three phases (L1, L2, L3) on AC systems up to 400V at 50/60Hz frequency. It features a powerful 10kA breaking capacity, making it suitable for installations with higher prospective short-circuit currents. The C-curve characteristic (5-10x In) provides excellent protection for circuits with small inductive loads while accommodating the inrush currents typical of small pumps, fans, and light industrial equipment. With its robust construction and precision thermo-magnetic release, the CB310C ensures equipment protection and operational safety for commercial and light industrial applications requiring three-phase protection with inductive load tolerance.
Triple Pole Protection: Simultaneously protects all three phases (L1, L2, L3) in three-phase systems, ensuring complete circuit isolation during fault conditions.
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 (50A to 100A), specifically calibrated for circuits with small inductive loads and moderate inrush.
Versatile 10A Three-Phase Protection with Inductive Tolerance: Ideal for small pumps (up to 2.2kW), ventilation fans, small compressors, and light industrial equipment.
Inductive Load Capability: Handles moderate inrush currents from small motor-driven equipment without nuisance tripping.
Wide Application Range: Suitable for light industrial, commercial HVAC, and small machine applications requiring three-phase protection.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response on all three 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.
Professional Installation: Standard 35mm DIN-rail mounting with IP20 finger-safe terminals and 16mm² wiring capacity.
| Specification | Details |
|---|---|
| Brand | Live |
| Series | CB |
| Model Number | CB310C |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 3 Pole (3P) |
| Current Rating (In) | 10 Amperes |
| 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 (all poles) |
| 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 applications require a 10A C-Curve triple pole MCB?
Small three-phase pumps up to 2.2kW (3HP), ventilation fans, small refrigeration compressors, light industrial conveyors, commercial HVAC fan coil units, and small machine tool auxiliary drives.
2. Can this 10A C-Curve breaker handle a 2.2kW three-phase pump?
Yes, it's ideal for 2.2kW pumps. The C-Curve tolerates starting currents up to 80-90A while the 10A rating provides excellent running protection without nuisance tripping.
3. What is the power capacity of this 10A three-phase C-Curve breaker?
Maximum three-phase load: 6.93kW at 400V. For motor applications, suitable for motors up to 2.2kW depending on starting characteristics and duty cycle.
4. Why choose C-Curve over B-Curve for small pump circuits?
C-Curve (5-10x In) handles starting currents up to 100A where B-Curve (3-5x In) would trip at 50A, making C-Curve essential for pump motors with moderate locked-rotor currents.
5. What cable size is recommended for 10A three-phase motor circuits?
1.5mm² copper conductor minimum per phase. 2.5mm² recommended for longer runs to minimize voltage drop during motor starting. All three phase conductors must be same size.
