PTC(正温度系数)热敏电阻,PTC Resettable Fuses简称PTC,又称自恢复保险丝:
自恢复保险丝PPTC:插件(DIP)自恢复保险丝和贴片(SMD)自恢复保险丝
插件(DIP)自恢复保险丝按照电压可分为:6V 16V 30V 60V 72V 240V 250V 600V
贴片(SMD)自恢复保险丝按照体积可分为:0603 0805 1206 1210 1812 2018 2920
自恢复保险丝PPTC串联在电路中实现过流保护。PTC通常由特殊处理过的聚合树脂及导体组成。在正常情况下,聚合树脂把导体束缚在结晶状的结构内,构成低阻抗的导电体。当电路出现异常电流急剧增大时,器件的温度瞬间上升,被束缚在聚合树脂上的导体便会分离,导致阻抗迅速提高,从而把电流限制在一定的范围内,保护电路免遭损坏。
Part Number |
I hold |
I trip |
V max |
I max |
Pd max. |
Maximum |
Resistance |
Agency |
|||
Current |
Time |
R min |
R 1max |
UL |
TUV |
||||||
SMD0603P004TF |
0.04 |
0.12 |
24 |
20 |
0.5 |
0.20 |
1.00 |
4.000 |
40.000 |
√ |
√ |
SMD0603P010TF |
0.10 |
0.30 |
15 |
40 |
0.5 |
0.50 |
1.00 |
0.900 |
6.000 |
√ |
√ |
SMD0603P020TF |
0.20 |
0.50 |
9 |
40 |
0.5 |
1.00 |
0.60 |
0.550 |
3.500 |
√ |
√ |
SMD0603P025TF |
0.25 |
0.55 |
9 |
40 |
0.5 |
8.00 |
0.08 |
0.500 |
3.000 |
√ |
√ |
SMD0603P035TF |
0.35 |
0.75 |
6 |
40 |
0.5 |
8.00 |
0.10 |
0.200 |
1.000 |
√ |
√ |
SMD0603P050TF |
0.50 |
1.00 |
6 |
40 |
0.5 |
8.00 |
0.10 |
0.100 |
0.680 |
√ |
√ |