4.9 Based on 1167 reviews 
Description
3 Pole 40A B Curve 10kA Miniature Circuit Breaker
Live Electrical Three Phase MCB – CB340B
The Live Electrical CB340B 3 Pole 40A B Curve 10kA MCB provides reliable protection for commercial 3-phase electrical systems. With its B Curve tripping characteristic, it is designed for circuits with lighter loads, such as lighting or small appliances. Moreover, the 10kA breaking capacity ensures safe operation, making it an ideal solution for projects that require both affordability and high performance.
Key Features:
- 3 Pole 40A MCB: Engineered for 3-phase systems, offering a current rating of 40 Amps.
- B Curve Tripping Characteristic: Ideal for circuits with lighter loads, tripping at 3 to 5 times the rated current. It is perfect for lighting or small appliances.
- 10kA Breaking Capacity: Safely handles fault currents up to 10kA, protecting circuits from overloads and short circuits.
- Voltage Rating: Compatible with 230/400V systems, operating at 50/60Hz frequency.
- Durability: Rated for 8,000 electrical operations and 20,000 mechanical operations, ensuring long-lasting performance.
- IP20 Protection: Ensures safety by preventing accidental contact with live parts in commercial environments.
Technical Specifications:
- Poles: 3P
- Rated Voltage (Ue AC): 230/400V
- Frequency: 50/60Hz
- Insulation Voltage (Ui): 500V
- Breaking Capacity: 6/10kA
- Impulse Withstand Voltage: 4000V
- Dielectric Test Voltage: 2kV
- Thermo-magnetic Release: B, C, D Characteristics
- Electrical Life: 8,000 operations
- Mechanical Life: 20,000 operations
- IP Rating: IP20
- Ambient Temperature: -5°C to +40°C (daily average ≤35°C)
- Storage Temperature: -25°C to +70°C
FAQs:
1. What is the function of a B Curve MCB?
A B Curve MCB trips when the current exceeds 3 to 5 times the rated load, making it suitable for circuits with lighter loads, such as lighting or small appliances.
2. Can this MCB be used in 3-phase systems?
Yes, this 3-pole MCB is specifically designed for commercial 3-phase systems and protects circuits that handle up to 40 amps.
3. Why is the 10kA breaking capacity important?
The 10kA breaking capacity ensures the MCB can safely handle fault currents up to 10,000 amps, providing essential protection against overloads and short circuits.
4. How durable is this MCB?
This MCB is rated for 8,000 electrical operations and 20,000 mechanical operations, making it a durable option for long-term commercial use.
5. Can this MCB operate in extreme temperatures?
Yes, it operates efficiently between -5°C and +40°C and can be stored in environments ranging from -25°C to +70°C.
Conclusion
The Live Electrical CB340B 3 Pole 40A B Curve 10kA MCB is a cost-effective yet high-performance solution for protecting circuits with lighter loads, such as lighting and small appliances. Its B Curve tripping characteristic and 10kA breaking capacity make it an ideal choice for commercial 3-phase systems that need both quality and affordability.
For project pricing, send us your list of required items via WhatsApp or email, and we’ll offer competitive rates tailored to your needs.
Explore more Live Electrical products:
