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- Positive Thermistors “Posi-R ”
- for Heater
for Heater
![](/english/_assets/images/business/posi/heater/kv.jpg)
This type thermistor heats up quickly and
evenly until reaching the desired temperature.
One of the main types of thermistors, those used for heaters, has a proven track record in in-vehicle supplemental heaters.
Specifications
- Rated Voltage :
- 12 to 220V
- Resistance :
- 0.5 to 2kΩ
Resistance value changes at rated voltage
![](/english/_assets/images/business/posi/heater/img_01.jpg)
How it works
Thermistors for heaters require safety and power saving performance. The Posi-R quickly heats up when current flows through it. The Posi-R reaches the heating temperature evenly throughout its entire structure. The heating temperature can be controlled by adjusting the construction of Posi-R’s material make-up. In addition, because Posi-R maintains a constant temperature thanks to a balance between heat generation and heat dissipation, it will not exceed the heating temperature.
【Voltage application time and product temperature】
![](/english/_assets/images/business/posi/heater/img_02_1.jpg)
Temperature quickly rises, and temperature and power usage are constant
【Thermistor for in-vehicle heater】
![](/english/_assets/images/business/posi/heater/img_02_2.jpg)
Posi-R is used as the heat generating element in heater units.
Record on the market
Posi-R has a proven track record for in-vehicle applications, a field where reliability is of the utmost importance. It is widely used as the heat-generating element in supplemental heaters used in hybrid vehicles and other eco-cars.
Features
- Quickly heats up to desired temperature.
- Its temperature is uniform and never gets red hot, making it very safe.
- Posi-R’s self-temperature-control effect prevents excessive heating.
- The Posi-R’s self-temperature-control function ensures power savings.
- Users can select their desired temperatures.
Applications
- In-vehicle supplemental heaters
- Facial massage heaters
- Condensation-prevention heaters for office equipment
- Clothes drying heaters
- Defrost heaters for refrigerators
![](/english/_assets/images/business/posi/heater/img_03.png)
Element
A disc type Posi-R is ideal for a small-power heater, making use of its self-heating and self-equilibrium characteristics. As a Posi-R self-heats when voltage is applied, the size of a heater element and the switching temperature can be optionally selected in accordance with the shape of appliances. Since this is of a non-contact control type, it is highly reliable for such applications. It is used for a Automobile-related appliances, house hold appliances and business machines.
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Rated Voltage | Resistance | Switching temperature |
---|---|---|
12V class | 0.5 to 3.0Ω | 260℃ or less |
100V class | 100 to 2000Ω | |
200V class | 200 to 2000Ω |
Resistance varies with size and Curie point.
- When considering evaluation, please contact your local authorized distributor along with required specifications and annual usage quantities.
Application Guidelines
Application Guidelines of Positive Thermistors “Posi-R ”
General Observations
- Do not use”Posi-R” in the presence of oil or water. The parts could fail.
- Do not apply voltage in excess of the maximum operating voltage. This could cause a short circuit or burn-out.
- Do not use “Posi-R” with reactive gas, reducing gas, or oxygen-free environment-electrical characteristics may deteriorate or burn-out may occur.
Notes on Usage
- Please use the parts within the rated operating temperatures according to the catalog.
- Please use at maximum operating voltage as specified in the catalog.
- Excessive press or shock (ex. drop) should not be applied to the "Posi-R".
Notes on Storage
-
Packaged parts should be stored under the following conditions :
temperature : –10 to +40˚C
humidity : 85% or less -
Storage of “Posi-R” devices may result in increased resistive characteristics.
They will return to the initial value by applying rated voltage prior to using the parts. - Shall be used shortly after opening the package.