PPTC -- Polymeric Positive Temperature Coefficient
PPTC (Polymeric Positive Temperature Coefficient), that is, a polymer polymer positive coefficient temperature element. Also known as Resettable Fuse or Polymer Fuse (Polyfuse), it is commonly known as self-recovering fuse or overcurrent protection sheet in the electronics industry in mainland China. In the Western electronics industry, it is called Polyswitch, which is the product trademark of Tyco Electronics.
1 basic information
PPTC is an abbreviation for English words: Polyer Positive Temperature coefficient.
Chinese meaning: high polymer polymer positive coefficient temperature resistance, namely: polymer positive temperature thermistor. The opposite of PTC is NTC: Negative temperature Coefficient Thermistor.
In the domestic electronic overcurrent / overvoltage protection industry, idioms refer to PPTC as a self-recovering fuse. The over-current protection sheet for secondary batteries is also a idiom in the domestic electronics industry, because the battery over-current protection sheet looks like a thin rectangular chewing gum. The material is welded on both sides of the nickel strip, and the middle is a polymer polymer structure. It is called PPTC for battery over-current protection sheet. The Poly Switch polymer switch is another name for PPTC.
At present, these different names and names with Chinese characteristics such as (self-recovery fuse / overcurrent protection sheet / polymer switch / temperature control switch, etc.) actually refer to PTC. The PTC is divided into a polymer type (PPTC) and a ceramic type (CPTC).
Self-recovery fuse parameter
Ih: maximum operating current (25 ° C)
IT: minimum operating current (25 ° C)
Itrip: nominal overload current
Tmax: maximum operating time at nominal overload current
Vmax: maximum overload voltage
Imax: maximum overload current
Rmin: minimum resistance (25 ° C)
Rmax: maximum resistance (25 ° C)