PTC Thermistor | Resistor Types | Resistor Guide - EE Power
WEBThe minimum resistance of a PTC thermistor is the lowest resistance that can be measured on a switched type PTC thermistor, as seen on the R-T curve. It is the point on the curve after which the temperature coefficient turns positive.
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.
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 ...
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.
Basic Characteristics | Basic Knowledge of PTC Thermistor …
WEBThe trip current of PTC thermistor varies depending on the ambient temperature, resistance value, temperature characteristics and shape.
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
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.
Temperature Sensors: Positive Temperature Coefficient (PTC) Thermistors …
WEBSep 16, 2020 — Once again, if you were going to implement this in your own project, you’d look at the resistance graph for the PTC thermistor and choose an appropriate resistor to optimize your output voltage for the range you need to sense.
WEB2 Definition. A 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.
WEBMost PTC thermistors are designed to operate with a transition temperature somewhere between 60°C and 120°C, however, devices can be manufactured that can switch as low as 0°C or as high as 200°C. The majority of switching PTC thermistors are intended to operate without an insulation coating.
- Some results have been removed