Zhejiang Sefie Electric Co.,Ltd.
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B / C / D Tripping Curve 6A - 63A MCB 6ka Mini Circuit Breaker
SFM4-63 series mini Circuit Breaker mini circuit breaker is mainly suitable for overload and short circuit protection. It is especially used for illumination and distribution in industry and commerce, etc. it has pleasing outlook & high breaking capacity, reliable performance, high inflammable resistance and shock resistance for long service life. It is within the circuit of AC 50/60Hz, rated voltage of single pole up to 240V, two, three or four poles up to 415V. It can also be used for an infrequent change over of the circuit and illumination under normal condition.
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Electrical Feature
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1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63 | ||
| Poles | 1P, 2P, 3P, 4P | ||
| Rate voltage(V) Ue | 230/400~240/415 | ||
| Insulation voltage(V) Ui | 500 | ||
| Rated frequency(Hz) | 50 | ||
| Tripping curve | B,C,D Type | ||
| Standard | IEC60898-1 | ||
| Breaking capacity(Ka) | 10 | ||
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Power loss per pole
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Rated current(A) | Max power loss per pole(W) | |
| 1, 2, 3, 4, 6, 10 | 2 | ||
| 16, 20, 25, 32, | 3.5 | ||
| 40, 50, 63, | 5 | ||
| Pollution degree | Ⅱ | ||
| Energy limiting class | 3 | ||
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Mechanical Features
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| Electrical life | 4000 | ||
| Mechanical life | 20000 | ||
| Contact position indicator | NO | ||
| Protection degree | IP20 | ||
| Reference temperature for setting of thermal element | 30℃ | ||
| Working ambient temperature | -5~40℃ | ||
| Storage temperature | -25~70℃ | ||
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Installation
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| Terminal connection type | Cable | ||
| Mounting | On DIN rail IEC60715(35mm) by means of fast clip device | ||
The maximum permissible crrent in a circuit breaker depends on the ambient temperature where the circuit breaker is placed. Ambient termperature is the temperature in side the enclosure or switchboard in which the circuit breakers are installed.
The reference temperature is 30℃
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Rated current(A)
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-35℃
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-30℃
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-20℃
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-10℃
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0℃
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10℃
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1
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1.3
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1.26
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1.23
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1.19
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1.15
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1.11
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2
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2.6
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2.52
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2.46
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2.38
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2.28
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2.2
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3
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3.9
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3.78
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3.69
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3.57
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3.42
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3.3
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4
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5.2
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5.04
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4.92
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4.76
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4.56
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4.4
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6
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7.8
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7.56
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7.38
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7.14
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6.86
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6.6
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10
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13.2
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12.7
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12.5
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12
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11.5
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11.1
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16
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21.12
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20.48
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20
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19.2
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18.4
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17.76
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20
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26.4
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25.6
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25
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24
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23
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22.2
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25
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33
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32
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31.25
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30
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28.75
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27.75
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32
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42.56
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41.28
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40
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38.72
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37.12
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35.52
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40
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53.2
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51.2
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50
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48
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46.4
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44.8
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50
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67
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65.5
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63
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60.5
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58
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56
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63
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83.79
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81.9
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80
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76.86
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73.71
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70.56
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Rated current(A)
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20℃
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30℃
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40℃
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50℃
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60℃
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70℃
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1
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1.05
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1
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0.96
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0.93
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0.88
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0.83
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2
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2.08
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2
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1.92
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1.86
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1.76
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1.66
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3
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3.12
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3
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2.88
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2.79
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2.64
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2.49
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4
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4.16
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4
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3.84
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3.76
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3.52
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3.32
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6
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6.24
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6
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5.76
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5.64
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5.28
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4.98
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10
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10.6
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10
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9.6
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9.3
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8.9
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8.4
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16
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16.96
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16
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15.36
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14.88
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14.24
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13.44
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20
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21.2
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20
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19.2
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18.6
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17.8
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16.8
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25
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26.5
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25
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24
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23.25
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22.25
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21
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32
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33.92
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32
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30.72
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29.76
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28.16
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26.88
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40
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42.4
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40
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38.4
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37.2
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35.6
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33.6
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50
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53
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50
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48
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46.5
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44
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41.5
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63
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66.78
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63
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60.48
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58.9
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55.44
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52.29
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