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Installation must be carried out by a qualified electrician.
Ensure power is switched off before installation.
Suitable for indoor use.
The Live CB120C Single Pole MCB is a heavy-duty miniature circuit breaker engineered to provide reliable protection for high-power single-phase electrical circuits in residential, commercial, and light industrial applications. Rated at 20 Amps with a C-curve tripping characteristic, this 1-pole breaker safeguards the phase conductor on AC systems up to 230V at 50/60Hz frequency. It features an enhanced 10kA breaking capacity, making it suitable for installations with higher prospective short-circuit currents. It delivers precise protection against overloads and short circuits, making it the ideal choice for heavy-duty circuits, large appliances, commercial power outlets, air conditioning units, and equipment where moderate inrush currents occur. With its robust construction and precision thermo-magnetic release, the CB120C ensures equipment protection and operational safety in demanding applications.
High 10kA Breaking Capacity: Enhanced fault current interruption for installations with higher prospective short-circuit currents.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (100A to 200A), ideal for heavy-duty circuits with moderate inductive loads.
High-Power 20A Protection: Perfect for large appliances, air conditioners, commercial kitchen equipment, and high-load power circuits.
Single Pole Configuration: Protects one phase conductor for single-phase 230V high-power circuits.
Commercial & Industrial Rating: 20A suits demanding applications in restaurants, workshops, hotels, and retail spaces.
Precision Thermo-Magnetic Release: Thermal bimetal strip for overload protection and magnetic solenoid for short-circuit response.
Superior Electrical Isolation: 4000V impulse withstand rating and 500V insulation voltage.
Extended Operational Life: 8,000 electrical operations for long-term reliability.
Professional Installation: DIN-rail mounting with IP20 finger-safe terminals and 16mm² wiring capacity.
| Specification | Details |
|---|---|
| Brand | Live |
| Model Number | CB120C |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 1 Pole (1P) |
| Current Rating (In) | 20 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 |
| Operating Temperature | -5°C to +40°C |
| Calibration Reference | 30°C |
| Electrical Lifespan | 8,000 cycles |
| Protection Class | IP20 |
| Terminal Capacity | Up to 16 mm² |
| Mounting Type | DIN Rail (35mm) |
| Standard | IEC 60898-1 |
1. What are the main applications for the CB120C 20A 1P MCB?
Heavy-duty residential circuits, large air conditioners (up to 5kW), commercial kitchen equipment, workshop power outlets, electric vehicle chargers, and high-power water heaters.
2. What is the power capacity of this 20A single pole breaker?
Maximum resistive load: 4.6kW at 230V. Continuous load (80% rule): 3.68kW. Suitable for most high-power single-phase appliances and equipment.
3. Can this 20A breaker support an instantaneous water heater?
Yes, most instantaneous water heaters up to 4.4kW draw approximately 19A, making this 20A breaker ideally sized with appropriate safety margin.
4. Why is 10kA breaking capacity important for commercial kitchens?
Commercial kitchens have high fault current potential due to multiple high-power appliances and proximity to main supplies. 10kA ensures safe interruption of these higher fault levels.
5. What cable size is recommended for 20A high-power circuits?
2.5mm² copper conductor minimum for short runs. 4mm² recommended for longer runs and mechanical robustness. Terminals accept up to 16mm².
