Introduction to Thermistor Technology

    NTC thermistor (NTC is the abbreviation of Negative Temperature Coefficient) is ahigh-density semiconducting ceramic element made of high-purity Mn,Co,Ni,Feand other oxidizing substances at high temperature.The basic characteristic is itsresistance value As the temperature increases and decreases,NT thermistors can bewidely used in temperature measurement,temperature compensation,and surgecurrent suppression.The main technical parameters of NTC thermistor

    Rated zero power resistance value R25(Ω)

    The rated zero power resistance value is the resistance value R25 measured by theNTC thermistor at a reference temperature of 25°℃.This resistance value is thenominal resistance value of the NTC thermistorB value(K)

    The B value reflects the resistance bending between two temperatures

    The B value is defined as:

    RT1:Zero power resistance value at temperature T1(K).R12:Zero power resistancevalue at temperature T2(K)

    T1 and T2 are two designated temperatures

    Dissipation coefficient(δ)

    Under the specified ambient temperature,NTC thermistor dissipation factor is the ratio of the power dissipated in the resistor to the corresponding temperaturechange of the resistor

    NTC thermistor dissipation factor (mW/K).P:Power consumed by NTCthermistor(mW)

    T:When NTC thermistor consumes power P,the corresponding temperature change (K) of the resistor body.

    Thermal time constant(T)

    Under zero power conditions,when the temperature changes suddenly,thetemperature of the thermistor changes by 63.2%of the two temperaturedifferences.

    The thermal time constant is directly proportional to the thermal capacity of the NTCthermistor and inversely proportional to its consumption coefficientt:

    T thermal time constant (S).C:Thermal capacity of NTC thermistor.δ:Dissipation coefficient of NTC thermistor.

Technical Support

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Thermistor description

THERMISTOR MODEL DESCRIPTION

  ①MF52 series:Bead-shaped precision NT thermistor

  ②Lead-out material type:A-tinned copper clad steel wire(CP wire)

  ③Nominal resistance:R25:503-50KΩ202-2.2K

  ④Tolerance range:F-±1%G-±2%H-±3%J-±5%K-±10%

  ⑤B value coefficient:3950-3950K3380-3380K

  ⑥Tolerance of B value:F-±1%G-±2%

  ⑦B value category:A-25/50℃ B-25/85℃C-25/100℃E-0/100℃or others

THERMISTOR CUSTOMIZATION IN STRUCTIONS

  1.Product model category

  2.Product nominal resistance(resistance at R25℃or others

  3.B value coefficient(example:B3435,B3950,B4100,etc.)

  4.Product accuracy requirements(1%~5%)

  5.Resistor pin length and specifications(enameled wire,Dumet wire,PVC wire,etc.)

  6.Operating temperature range

  7.Other requirements(labeling,printing,etc.)

Temperature sensor description

TEMPERATURE SENSOR MODEL DESCRIPTION

  ①Sensor probe:ST is copper-nickel-plated material,5*25 is the overall size

  ②Thermistor type:A-MF52A B-MF58B C-MF58D D-MF52D or others

  ③Resistance parameters:103F3950F-10K1%3950503F3950F-50K1%3950

  ④Wire size:22-#22awg 24-#24awg 26-#26awg 28-#28awg

  ⑤Wire category:C-double parallel wire F-Teflon wire H-sheathed wire

  ⑥Wire color:B-black Y-yellow R-red W-white

  ⑦Wire model:UL2651 UL3398 UL2464 Ul1332

  ⑧Wire length:The number suffixed with Lis the wire length

  ⑨End treatment:XH terminal model 2P is the number of sockets

TEMPERATURE SENSOR CUSTOMIZATION INSTRUCTIONS

  1.Product probe size specifications (tube,bullet,flange,etc.)

  2.Product nominal resistance(resistance at R25℃or others)

  3.B value coefficient(example:B3435,B3950,B4100,etc.)

  4.Product accuracy requirements(1%~5%)

  5.Wire type and length (UL2651,UL1332,UL3398,etc.)

  6.End treatment (immersion tin,terminal,audio socket,cold-pressed terminal,etc.)

  7.Operating temperature range8.Other requirements(casing,labeling,printing,independent packaging,cards,etc.)

Product display

Change oftemperature resistance characteristic