Thermistors (St-Series)

Application field:

Ptc thermistors are used to monitor temperature in machines and installations. The design ensures short response times and easy installation.

The product sells point

Ptc thermistors acc. To din 44081(triple sensors acc. To din 44082) are used to protect electrical machines against thermal overload. Thermistors have an even steeper r/t characteristic as that defined in the din standard. The temperature range is from 60 to 180. Ptc thermistors beads with different rated response temperatures can be connected in series. This permits an optimal and economic thermal protection of machines and windings with different limit tempratures.

Key specifications/special features

Single triple
Max.Operating voltage 30 30 v
Rated response temperature tk60-18 c
Tolerance of tk ía5 ía5 k
Resproducibility of tk ía0.5 ía0.5 k
Resistance r25 ín100 ín300 ª+
Resistance at a temperature of tk-5k ín550 ín1650 ª+
Resistance at a temperature of tk +5k í²1330 í²3990 ª+
Resistance at a temperature of tk +15k í²4 í²12 kª+
Thermal response time td ín5 ín5 s
Insulation test voltage v ac2.5 ac2.5 kv
Max.Operating temprature 200 200 c
Max.Storage temperature 160 160 c
Min.Srorage temperature -25 -25 c
Weight 2 3.5 g

MF52F Temp-Measurement NTC Thermistor Series
Shiheng Electronics Application

Air condition Equipments/ Heating Apparatus/Electric Thermometer/Liquid Level Sensor/ Automobile Electricity/ Electric Table-board/ Battery of Mobile Telephone

What are PTC thermistors made of?
Most PTC thermistors are made from doped polycrystalline ceramic (containing barium titanate (BaTiO3) and other compounds) which have the property that their resistance rises suddenly at a certain critical temperature. Barium titanate is ferroelectric and its dielectric constant varies with temperature.

Characteristic

high precision NTC thermistors

Small size, Fast response

Steady Operating for long time

Good quality of copherence and interchange

Scale production, high ratio of features to cost
This is a property of a Negative Temperature Coefficient resistor (NTC ).

There are also thermistors that have Positive Temperature Coefficient (PTC for short) which means as the temperature increases, the resistance increases. However, PTC thermistors have a sort of tipping point and greatly change the resistance at some temperature. This makes the PTC thermistor a little harder to interface with. For this reason, for most low-cost temperature measurement, NTC thermistors are preferred.

For the remainder of the article, you can assume we'll be referring to NTC type thermistors.

Knowing the temperature in a project can a very useful piece of data to have handy. Knowledge of temperature can help regulate room temperature for a comfortable environment, ensure that a 3D printer bed is hot enough for materials like ABS to stick to its surface, prevent engine overheating, and keep food from being burnt.

For this article, we are only concerned with one type of sensor that can measure temperature. This sensor is called a thermistor.

Technical parameters:
Rated voltage: 50/60hz, 250v, ac
Nominal current: 5 a
Fixed break-off temperature scope: +70 f¦ ~+150 f¦, take 5 f¦ as a grade
Tolerance: (+/-)5k
On-off differential temp (general): (30(+/-)15k)

Smd type and negative temperature co-efficient(n.T.C.) thermistors. Generally practice in engineering and electronics industry field, as well as apply in biochemical, technology, automobile and medical system. We can do oem and odm or customize for any type of custimer and recommand the suitable products for them.

Temperature sensor series generally apply in engineering, electronics industry, as well as use in the biochemical, technology, automobile and medical system. Oem/odm and provide customers with customization options.

Dimension for outline:


Specification:
1.Rating currentú¦min.5Aú¼max.20A
2.Working pressureú¦min.12Vú¼max.250V
3.Double usage of DC and AC
Application scopeú¦Used at the prote ction of compound outlet, power transformer and electrical motor.
Current specificationú¦5A-15A125V UL