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Shop Westhomes WNB1-63 4P MCB with 6kA breaking capacity. Ideal for 415V systems, this Four Pole Circuit Breaker isolates Phase and Neutral.
Westhomes WNB1-63 4P Miniature Circuit Breaker – Complete Isolation for Three-Phase Systems with Neutral.

The Westhomes WNB1-63 4P MCB is the ultimate solution for applications requiring total isolation and protection of all incoming conductors. By protecting all three phases and the neutral conductor, this breaker ensures absolute safety for maintenance personnel and equipment in complex three-phase installations.
Key Features:
Full System Isolation: Switches and protects all four poles (L1, L2, L3, N), ensuring no live parts remain when the breaker is in the “OFF” position.
Neutral Protection: Unlike switched neutrals, the 4P design provides overload and short circuit protection on the neutral in applicable configurations (depending on network type).
Reliable 6kA Performance: Maintains consistent breaking capacity across all poles for dependable fault clearing.
Adaptable Tripping: Available in B, C, and D curves, allowing customization for everything from electronic loads to high-induction machinery.
Universal Mounting: Standardized housing for DIN rail systems, making it easy to integrate into main distribution boards (MDBs).
Applications
Main switch for small workshops, three-phase distribution boards requiring neutral isolation, server rooms, and industrial control panels.
| Type | MCB |
| BCD Curve | B, C, D |
| Rated Frequency (Hz) | 50hz/60hz |
| Material | Copper |
| Application | Circuit-Breaking |
| Model Number | WNB1-63 Series |
| Rated Voltage | 220V/230V, 400 V |
| Breaking Capacity | 6 kA |
| Mounting Type | Rail Mounting |
| Protection | Li |
| Place of Origin | Zhejiang, China |
| Brand Name | Westhomes |
| Standard | IEC/EN 60898-1 |
| Protection | Overcurrent and short circuit |
| Type of trip | Thermo-magnetic |
| No.of poles | 1P,1P+N,2P,3P,3P+N,4P |
| Rated currents(In) | 1,2,3,4,5,6,8,10,16,20,25,32,40,50,63A |
| Rated voltage(Ue) | 240/415V~ |
| Rated frequency | 50/60Hz |
| Rated breaking capacity | 3KA,4.5KA,6KA. |
| Rated impulse withstandard voltage(1,5/50)Uimp | 4,000V |
| Dielectric test voltage at Ind.Freq.for 1 min | 2kV |
| Thermal release characteristic | (1.13-1.45)x In |
| Magnetic release characteristic | B:(3-5)x In,C:(5-10)x In,D:(10-20)x In |
| Electrical life | 4,000 Cycles |
| Mechanical life | 10,000 Cycles |
| Contact position indicator | Yes |
| Protection degree | IP20 |
| Ambient temperature | -5℃ to+40℃,Max.95%humidity |
| Terminal connection type | Cable/Pin-type busbar |
| Installation | Mounting on 35mm DIN rail |
| Connection | From top and bottom |
| Selling Units | Single item |
| Quantity (pieces) | 1 – 1,000 | > 1,000 |
| Lead time (days) | 15 | To be negotiated |
Westhomes® is a professional manufacturer for low voltage and high voltage electrical products with a thirty-year history.
Main supplier of state-owned companies like China Stae Grid, China Southern Power Grid through bidding with bunches of test certificates, sales records and operation performance to support.
Enough investment for research and development for the products innovation.
18 months from the date of receivement
Depends on the required quantity and delivery urgency, both international express like UPS / DHL / EMS / HK EMS / FedEx / TNT (door to door service) and normal sea shipping & air freight also avaliable.
Up to the client
We accept T/T, Paypal, Western union, L/C. Normally 30% payment in advance, 70% before delivery.
First to send an inquiry via made-in-china platform or directly to the contact e-mail address. All the following thing is the communication between us.
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