PTC Thermistor | Resistor Types | Resistor Guide - EE Power
WEBThe transition temperature of most switched PTC thermistors is between 60 and 120 °C. However, there are special application devices manufactured that can switch as low as 0 °C or as high as 200 °C. The resistance-temperature (R-T) characteristics of …
WEBAll of the PTC thermistors are specified to have a resistance of 470 Ω at room temperature (25 oC). As stated earlier, this resistance jumps up dramatically after the Curie temperature.
WEBA PTC thermistor is a thermally sensitive semiconductor resistor. Its resistance value rises sharply with increasing temperature after a defined temperature (reference temperature) has been exceeded. The very high positive temperature coefficient (PTC) of the resistance above the reference tem-perature has given the PTC thermistor its name.
WEBThe PTC’s resistance values for motor protection are specified in DIN 44081/44082. Resistance values below q NAT –20 are not specified, and resistance when cold is no indication of the PTC’s condition. It is ideally between 40 - 200 ohms but can be anywhere between 35 - 250 ohms. The greatest resistance change occurs between 65 °C either ...
WEBAvoid contamination of thermistors surface during storage, handling and processing. Avoid storage of thermistor in harmful environment with effect on function on long-term opera-tion (examples given under operation precautions). Use thermistor within the following period after delivery: Through-hole devices (housed and leaded PTCs): 24 months
Basic Characteristics | Basic Knowledge of PTC Thermistor …
WEBShown in figure 8, the load curve (a) and the current voltage characteristic of the PTC thermistor are stabilized at point (A), and act as a simple fixed resistor. it stabilizes at the intersection point (B) with the load curve (b).
WEBA flow chart in the quality section of this book (see page) shows the individual processing steps in detail. The chart also illustrates the extensive quality assurance measures taken during manufac-ture to guarantee the constantly high quality level of our thermistors.
WEBBefore we explain PTC Heater & Fuse applications, we first need to understand a few key terms: R @ 25ºC –Resistance at 25°C. Most PTC’s are 5 to 250 ohms Voltage –The steady state or application voltage used in the circuit. As a margin of safety, PTC’s are designed to survive a voltage that is 1.5 or 2 times the rated application voltage.
WEBpt100 temperature / resistance table °c 0 1 2 3 4 5 6 7 8 9 °c-200 18.4932-200-190 22.8031 22.3737 21.9439 21.5139 21.0834 20.6526 20.2215 19.7899 19.3580 18.9258 -190
WEBAvoid contamination of thermistors surface during storage, handling and processing. Avoid storage of thermistor in harmful environment with effect on function on long-term opera-tion (examples given under operation precautions). Use thermistor within the following period after delivery: Through-hole devices (housed and leaded PTCs): 24 months
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