B59052D1070A040 Cross Radial Through Hole PTC Thermistor 100 Ohms 70°C Bead With Terminal

Application notes Of The PTC Thermistor 100 Ohms 70°C Bead

PTC thermistors as limit temperature sensors With PTC thermistors as temperature sensors only the steep region of the R/T characteristic is used. The resistance of the PTC thermistor is to be regarded as a function of the ambient temperature [RPTC = f (TA)]. The precondition for this relationship between resistance and ambient temperature is that selfheating and/or the varistor effect are excluded. This means that these PTC thermistors must be operated in the lowest possible field strengths. To enable a fast response, thermistor sensors have especially small dimensions. High control accuracy is achieved by using materials with an extra steep resistance/temperature characteristic. Limit temperature measurement for industrial applications A PTC thermistor can be used effectively to detect whether a temperature limit in industrial equipment, liquids, etc. is exceeded. The PTC thermistor is mounted in thermal contact with the medium that has to be protected from overheating. When the rated temperature limit of the medium is reached, the resistance of the PTC thermistor increases abruptly. In connection with a control unit, this signal can be used to automatically switch off the power supply of a load. EPCOS offers leaded disks, metal tags, screw-type metal cases as well as surface-mounted devices.

Applications Of The PTC Thermistor 100 Ohms 70°C Bead

1. Switch power supply.
2. Electronic equipment (motor, transformer, etc)
3. Power parts.

4. Limit temperature sensor

5. Motor protection

6. Overtemperature protection

Advantages of PTC limit temperature sensors

PTC thermistors are temperature-dependent resistors based on special semiconductor ceramics with a high positive temperature coefficient (PTC). They exhibit relatively low resistance values at room temperature, but their resistance rises significantly when they are heated by an external heat source to above a certain temperature (Curie temperature).
With this unique property PTC thermistors are used to protect components and devices from overheating.ampfort's broad portfolio of high-quality and highly reliable PTC limit temperature sensors includes SMD, leaded disk and screw-on types, so that a suitable component is available for nearly every overtemperature detection requirement. Motor protection sensors are PTC limit temperature sensors with a special designed shape, allowing them to be directly assembled within the windings (stator side) of electric motors.
The following are applications for PTC limit temperature sensors and motor protection sensors.
* In the following articles and diagrams PTC limit temperature sensors and motor protection sensors are referred to as PTC thermistors for short. Also, circuit diagrams are simplified.

Overtemperature protection for power semiconductor devices

Features Of The PTC Thermistor 100 Ohms 70°C Bead

1) Sensor with epoxy resin coating
2) Tinned leads
3) Metal tag for easy mounting
4) Lead-free terminals
5) Characteristics for sensing temperatures
6) Metal tag permits good thermal coupling and thus short response time
7) RoHS-compatible

8) 2 outlook:A-pin coated form,B-metal form.
9) Protection temperature:60~130℃
10) Quick response.
11) Long stability.
12) Small dimension, convenient for installation.
13) Do not need to be reset after protection.

Dimension in mm Of The PTC Thermistor 100 Ohms 70°C Bead

Electrical Performance Of The PTC Thermistor 100 Ohms 70°C Bead

Handling Of The PTC Thermistor 100 Ohms 70°C Bead

PTCs must not be dropped. Chip-offs must not be caused during handling of PTCs.
The ceramic and metallization of the components must not be touched with bare hands. Gloves
are recommended.
Avoid contamination of thermistor surface during handling.

Soldering (where applicable) Of The PTC Thermistor 100 Ohms 70°C Bead

Use rosin-type flux or non-activated flux.
Insufficient preheating may cause ceramic cracks.
Rapid cooling by dipping in solvent is not recommended.
Complete removal of flux is recommended.
Standard PTC heaters are not suitable for soldering.

Storage Method Of The PTC Thermistor 100 Ohms 70°C Bead

1. In the process of storage and transportation, per stack height is not more than 4 CTN products.
2. Available with all transport method, but avoid the rain, snow of direct or indirect leaching and mechanical damage.
3. Products should be stored in the temperature of environment - 10 ℃ / + 40 ℃, relative humidity is not more than 75%,
environment should not have acid, alkali and corrosion gas or radioactive source.
4. Period of Storage:1 year.

Related Products Of The PTC Thermistor 100 Ohms 70°C Bead

PTC Thermistors Selection guide

1) PTC thermistors for overcurrent protection

2) PTC thermistors for overcurrent protection and as inrush current limiters

3) PTC thermistors as inrush current limiters in housing

4) PTC thermistors for telecom applications

5) PTC thermistors for switching applications (e.g. lighting, general-purpose)

6) PTC thermistors for motor starting

7) PTC thermistors as point level sensors

8) PTC thermistors for motor protection

9) PTC thermistors as limit temperature sensors

10) PTC thermistors as heating elements