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Installation must be carried out by a qualified electrician.
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Suitable for indoor use.
The Live CB316B Triple Pole MCB is a high-capacity miniature circuit breaker designed to provide reliable protection for general-purpose three-phase electrical circuits with resistive loads. Rated at 16 Amps with a B-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 B-curve characteristic (3-5x In) provides fast response to faults while accommodating the minimal inrush currents typical of commercial lighting and distribution circuits. With its robust construction and precision thermo-magnetic release, the CB316B ensures equipment protection and operational safety for commercial and light industrial applications requiring three-phase protection at medium current ratings.
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.
B-Curve Characteristic: Trips instantaneously at 3-5 times rated current (48A to 80A), specifically calibrated for general circuits with minimal inrush.
High-Capacity 16A Three-Phase Protection: Ideal for commercial lighting circuits, distribution boards, small water heaters, and general power distribution.
Wide Application Range: Suitable for commercial buildings, retail spaces, schools, and light industrial facilities 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 | CB316B |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 3 Pole (3P) |
| Current Rating (In) | 16 Amperes |
| Trip Curve Type | B Curve (3-5 × 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 16A triple pole MCB with B-Curve?
Three-phase commercial lighting circuits, small distribution boards, three-phase socket outlets in workshops, small water heaters (up to 11kW), and general power distribution in retail spaces and offices.
2. What is the power capacity of this 16A three-phase breaker?
Maximum resistive load: 11.09kW at 400V three-phase. Per phase capacity: 3.68kW at 230V. Suitable for general commercial distribution and lighting applications.
3. Can this breaker be used for three-phase socket outlet circuits in workshops?
Yes, it's ideal for protecting 16A three-phase socket outlets in workshops, small industrial areas, and commercial kitchens where equipment has minimal inrush currents.
4. Why choose 10kA breaking capacity for 16A commercial circuits?
Provides enhanced protection in installations with higher fault currents, such as near main distribution boards or in commercial panels where fault levels may exceed standard 6kA ratings.
5. What cable size is recommended for 16A three-phase circuits?
2.5mm² copper conductor minimum per phase. 4mm² recommended for longer runs or higher ambient temperatures. All three phase conductors must be same size. Terminals accept up to 16mm².
