CNC Electric 3 Pole MCB 16A–63A (YCB7-63N) – Three Phase AC Circuit Breaker
Out of stock
Three pole 400V AC MCB for three-phase circuits. 6kA breaking capacity, C-curve, 3-module DIN-rail mount, ratings from 16A to 63A.
The CNC YCB7-63N 3 pole MCB protects all three phases (L1, L2, L3) through a single trip mechanism, so a fault on any one phase disconnects the whole circuit. This helps avoid the single-phasing condition that can damage three-phase motors and compressors.
Key Features
- Switches L1, L2 and L3 together; neutral is not switched
- 400V AC, 50Hz rating with 6kA breaking capacity
- C-curve tripping at 5 to 10 times rated current
- Five ratings: 16A, 20A, 32A, 40A and 63A
- 3-module (54mm) DIN-rail body, terminals up to 25mm²
- IEC 60898-1 standard, 5-year replacement warranty
Technical Specifications
| Product Type | 3 Pole MCB — Three-phase Miniature Circuit Breaker |
|---|---|
| Model | YCB7-63N (3P) |
| Poles | 3P (L1 + L2 + L3, no neutral) |
| Current Ratings | 16A, 20A, 32A, 40A, 63A |
| Rated Voltage | 400V AC, 50Hz (3-phase) |
| Breaking Capacity | 6kA at 400V AC |
| Trip Curve | C-curve (trips at 5-10× rated current) |
| Standard | IEC 60898-1 |
| Mounting | 35mm DIN rail |
| Module Width | 3 modules (54mm) |
| Terminal Capacity | Up to 25mm² cable |
| Mechanical Life | 20,000 operations |
| Electrical Life | 10,000 operations |
| Warranty | 5-year replacement warranty |
Available Options
- Ampere: 16A, 20A, 32A, 40A, 63A
Where to Use
- Three-phase motor and compressor circuits
- Sub-feeders on commercial distribution boards
- Workshops and small industrial panels where the neutral is not switched
Frequently Asked Questions
Does a 3 pole MCB switch the neutral?
No. It switches the three phases only. If you need the neutral switched as well, choose the 4 pole MCB.
Can it protect a three-phase motor?
It gives overload and short-circuit protection for three-phase circuits. Pair it with a contactor or VFD for start and stop control.
What cable size can the terminals take?
Up to 25mm² cable.
Need help choosing the right model or rating? Contact CNC Electric Pakistan on 0326-1111376 before you order.
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