thermistor power limit current limit resistor surge arrestor diameter 5ohm 7mm NTC thermistor

 Electronic components- NTC thermistor MF72-5D7

 Thermistor-A thermistor is a type of resistor whose resistance varies significantly with temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiter, temperature sensors (NTC type typically), self-resetting overcurrent protectors, and self-regulating heating elements.

 Thermistor differ from resistance temperature detectors (RTDs) in that the material used in a thermistor is generally a ceramic or polymer, while RTDs use pure metals. The temperature response is also different; RTDs are useful over larger temperature ranges.

Thermistor can be classified into two types, depending on the classification of k. If k is positive, the resistance increases with increasing temperature, and the device is called a positive temperature coefficient (PTC) thermistor, or posistor. If k is negative, the resistance decreases with increasing  temperature, and the device is called a negative temperature coefficient (NTC) thermistor.

Resistors that are not thermistors are designed to have a k as close to 0 as possible, so that their resistance remains nearly constant over a wide temperature range.

PRODUCT:

 1.Dimension:

D=Max.8.5mm     L=Min.25mm     F=5mm+/-1.0mm  T=Max.5mm   d=0.55+/-0.06mm

2. Material: 

Coating: Phenolic resin 

Lead wire: CP lead wire

Coating color: Black

3. Technical data:

A. Zero power resistance at 25 ℃ : 5+/-20%

B. B value: 2600K+/-10%

C.Thermal time constant: 30s

D. Thermal Dissipation Constant: 10 mW/℃

E.Operating Temperature:-40+200

F.Max. Steady State Current: 2A

FUNCTION:

 RECOGNIZED BY CERTIFICATE: 

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