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| Categories | MCB Circuit Breaker | 
|---|---|
| Brand Name: | SONTUNE | 
| Model Number: | ST3-63 | 
| Certification: | CE | 
| Place of Origin: | China | 
| MOQ: | 10000PCS | 
| Price: | Negotiable | 
| Supply Ability: | 10000PCS/DAY | 
| Packaging Details: | 240PCS/CTN | 
| Delivery Time: | 20DAYS | 
| in: | 6,10,16,20,25,32,40,50,63A | 
| Ue: | 230/400V | 
| Pole: | 3p | 
| Breaking Capacity: | 6KA | 
| Credential: | CE | 
| Color: | White | 
3P Type D MCB Main Circuit Breaker , Normal Voltage Thermal Magnetic Circuit Breaker
General
ST2-63 series high breaking capacity mini circuit breaker is used
in AC50/60Hz, rated voltage of 230V
3, 4 poles 400V, rated current to 63A for overload and short-circuit protection as well as for unfrequented switching under normal case.It is used extensively for industry, commercial and household.This product conform to IEC60898 standard.
1. Application:For protecting cables and equipments against overload and short circuit.
2. General rules for choosing MCB.
The earthing systems,short-circuit current at the circuit breaker installation point,which must always be less than the breaking capacity of this device,network normal voltage.
B curve (3-5In) protection and control of the circuits against length cables in TN and IT systems.
C curve (5-10In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low inrush current.
D curve (10-14In) protection and control of the circuits against overloads and short-circuits; protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers,breakdown lamps.)
Specifications
| Model | ST3-63 MCB | 
| Pole | 1P,2P,3P,4P | 
| Rated Current(In) | 1,2,4,6,10,16,20,25,32,40,50,63A | 
| Rated Voltage(Un) | 230/400V | 
| Rated Frequency | 50/60HZ | 
| Tripping curve | B,C,D | 
| Magnetic releases | B curve: between 3and 5 In | 
| C curve: between 5and 10In | |
| D curve: between 10 and 14In | |
| Electro-mechanical endurance | over 6000 cycles | 
| Standard | IEC/EN 60898-1 | ||
| Electrical features | Rated current In | A | 1,2,4,6,10,16,20,25,32,40,50,63 | 
| Poles | P | 1,2,3,4 | |
| Rated voltage Ue | V | 230/400 | |
| Insulation voltage Ui | V | 500 | |
| Rated frequency | Hz | 50/60 | |
| Rated breaking capacity | A | 4500,6000 | |
| Rated impulse withstand voltage(1.2/50)Uimp | V | 4000 | |
| Dielectric test voltage at ind.Freq.for 1 min | Kv | 2 | |
| Pollution degree | 2 | ||
| Thermo-magnetic release characteristic | B,C,D | ||
| Mechanical features | Electrical life | t | 4000 | 
| Mechanical life | t | 10000 | |
| Protection degree | IP20 | ||
| Reference temperature for setting of thermal element | ℃ | 30 | |
| Ambient temperature (with daily average ≤35℃) | ℃ | -5~+40(Special application please refer to temperature compensation correction) | |
| Storage temperature | ℃ | -25~+70 | |
| Installation | Terminal connection type | Cable/Pin-type busbar | |
| Terminal size top/bottom for cable | mm2 | 25 | |
| AWG | 18-3 | ||
| Therminal size top/bottom for busbar | mm2 | 25 | |
| AWG | 18-3 | ||
| Tightening torque | N*m | 2 | |
| In-lbs | 18 | ||
| Mounting | on DDIN rail EN 60715(35mm)by means of fast clip device | ||
| Connection | From top and bottom | 

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