PTC motor protection temperature sensor

General

A thermistor is a temperature-dependent semiconductor resistor consisting of polycrystalline ceramics. While ceramic normally has insulating properties, the characteristic curve is achieved by doping of barium titanate ceramic with other substances and is formed to a small, soft-solderable pill in the manufacturing process, to which a power cable is attached.

The conductivity of the PTC thermistor is lower at higher temperatures than at low temperatures. Therefore the thermistor has a positive temperature coefficient (PTC), thus increases its electrical resistance with increasing temperature.

Application

PTC thermistors are primarily used for surveillance tasks, mainly the thermal monitoring of motors, generators or transformers. Due to the abrupt change of characteristic curve the thermistor is not suitable for continuous measurement tasks, but are used to interrupt the power supply at a precisely defined reference temperature.

Functional principle

Thermistors available from Alpha Elektroniks are predominantly motor protection thermistors according to DIN 44080-82, they are installed in the windings of electric motors, generators and transformers. With increasing temperature the resistance increases abruptly once a certain reference temperature (NAT ± 5 K) is exceeded.

  

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PTC Thermistor

PTC Single Thermistor 60°C to 180°C

PTC Thermistor 60°C to 180°C
Single Thermistor 100Ω
520mm wire length
UL-Style, RoHS

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Shippingtime: 2-4 days 2-4 days (abroad may vary)

GRB motor overheat protection module

GRB motor overheat protection module

GRB motor overheat protection module
Relay AC/DC 100mV…AC250V / 0,5mA…6A, 300VA
~ 1.000.000 Cycles
Single or Triple PTC Thermistor
 

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Shippingtime: 2-4 days 2-4 days (abroad may vary)

PTC Thermistor

PTC Triple Thermistor 60°C to 180°C

PTC Thermistor 60°C to 180°C
Triple Thermistor 300Ω
520mm wire length
UL-Style, RoHS

You do not have permission to view the prices

Shippingtime: 2-4 days 2-4 days (abroad may vary)

  

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