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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 CA440C 4 Pole MCB is a heavy-duty industrial-grade miniature circuit breaker engineered to provide comprehensive protection for three-phase systems requiring simultaneous neutral conductor switching in demanding applications with large inductive loads. Rated at 40 Amps with a C-curve tripping characteristic, this 4-pole breaker safeguards all three phases and the neutral conductor on AC systems up to 400V at 50/60Hz frequency. It delivers robust protection against overloads and short circuits, making it the ideal choice for industrial main distribution boards, large motor circuits (up to 18.5kW/25HP), industrial compressors, heavy pumps, and manufacturing equipment where complete isolation of all conductors is essential for operational safety. With a substantial 6kA breaking capacity and precision thermo-magnetic release, the CA440C ensures equipment protection and personnel safety in demanding industrial environments.
Complete 4-Pole Industrial Protection: Simultaneously protects and switches all three phases (L1, L2, L3) and neutral (N), ensuring complete circuit isolation for heavy industrial applications with large inductive loads.
Heavy-Duty C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (200A to 400A), handling large motors, compressors, and transformers with significant inrush currents.
Ideal Industrial Main Distribution Rating: 40A per pole provides substantial capacity for industrial main distribution boards and large motor circuits up to 18.5kW (25HP).
Integrated Neutral Switching: Neutral pole disconnects simultaneously with phases, preventing floating neutral conditions and ensuring complete safety during maintenance.
Reliable Breaking Capacity: Certified 6kA rating ensures safe interruption of fault currents, protecting expensive industrial equipment.
Precision Thermo-Magnetic Release: Thermal bimetal strip for overload protection and magnetic solenoid for short-circuit response across all four 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 in demanding industrial duty cycles.
Professional Installation: DIN-rail mounting with IP20 finger-safe terminals and 16mm² wiring capacity.
| Specification | Details |
|---|---|
| Brand | Live |
| Model Number | CA440C |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 4 Pole (3P + N) |
| Current Rating (In) | 40 Amperes |
| Trip Curve Type | C Curve (5-10 × In) |
| Operational Voltage | 230/400V AC |
| Frequency Range | 50/60 Hertz |
| Short-Circuit Capacity | 6kA (6000 Amps) |
| 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) |
| Neutral Pole Protection | Switched neutral |
| 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 CA440C 40A 4P MCB?
Industrial motor circuits up to 18.5kW (25HP), compressors, large pumps, HVAC systems, industrial main distribution boards, and manufacturing equipment requiring neutral switching.
2. What motor power can this 40A breaker handle?
DOL start: up to 15kW (20HP). Star-delta/soft start: up to 18.5kW (25HP). Always verify motor starting characteristics.
3. Why choose 4-pole over 3-pole for industrial applications?
Provides complete isolation of all conductors including neutral, required for IT earthing systems, VFDs, CNC machines, and safety compliance with IEC 60204.
4. What cable size is recommended for 40A industrial circuits?
10mm² minimum, 16mm² recommended for runs up to 35m. For longer runs, use 25mm² with external termination.
5. When is 4-pole switching mandatory?
IT earthing systems, generator changeover panels, marine installations, construction sites, and where equipment manufacturers specify complete isolation.
