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PTC Thermistors Alloy Wire Positive Temperature Coefficient Resistor For Heating Featured Image
  • PTC Thermistors Alloy Wire Positive Temperature Coefficient Resistor For Heating
  • PTC Thermistors Alloy Wire Positive Temperature Coefficient Resistor For Heating
  • PTC Thermistors Alloy Wire Positive Temperature Coefficient Resistor For Heating
  • PTC Thermistors Alloy Wire Positive Temperature Coefficient Resistor For Heating

PTC Thermistors Alloy Wire Positive Temperature Coefficient Resistor For Heating

Short Description:

PTC Alloy resistance wire has medium resistivity and high positive temerature coefficient of esistance .
It has widely used in various heaters. It can automatically control temperature and sdjust power by keeping constant current and limiting current.


  • Model NO.: PTC wire
  • Material: Nickel Iron alloy wire
  • surface: Bright
  • diameter: 0.025-5.0mm
  • sample: accepted sample order
  • Resistivity: 0.13-0.60
  • HS code: 75052200

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    Product Description

    PTC  Alloy resistance  wire  has  medium  resistivity  and  high  positive  temerature  coefficient  of  esistance .
    It  has  widely  used  in  various  heaters.  It  can  automatically  control  temperature  and  sdjust  power  by  keeping  constant  current  and  limiting  current.Chemical composition:

    Name Code Main Composition
    Fe S Ni C P Standard
    Temperature Sensitive Resistance alloy wire PTC Bal. ≤0.01 77~82 ≤ 0.05 ≤0.01 Q/320421PTC4500-2008

    Specifications  and   tolerances

     Diameter 0.05 0.10 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.25
    Tolerance ± 0.003 ± 0.005 ± 0.008

    Temp.Coeff.Of resistance(20ºC)

    Type PTC-4500 PTC-4000 PTC-3800 PTC-3400 PTC-3000 PTC-2500
    0~150ºCaverage, PPM 4500 4000 3800 3400 3000 2500

    Resistivity (20ºC)(μΩ.m)

    Type PTC-4500 PTC-4000 PTC-3800 PTC-3400 PTC-3000 PTC-2500
    at20ºCresistance ±5%μΩ.m 0.20 0.38 0.40 0.43 0.52 0.6

    The table for resistance

    Product ±0.5%Ω/m Dia.(mm)and cross-sectional area (mm²)
    0.05 0.10 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.25
    0.00196 0.00785 0.00176 0.0201 0.0227 0.0255 0.0284 0.0314 0.0346 0.0380 0.0415 0.0452 0.0491
    PTC-4500 96.93 24.20 10.79 9.45 8.37 7.45 6.69 6.05 5.49 5.00 4.58 4.20 3.87
    PTC-4000 127.55 31.84 14.20 12.43 11.014 9.80 8.80 7.69 7.22 6.58 6.02 5.53 5.09
    PTC-3800 137.75 34.39 15.34 13.43 11.89 10.59 9.51 8.60 7.80 7.11 6.51 5.97 5.50
    PTC-3500 183.67 45.85 20.45 17.91 15.86 14.12 12.68 11.46 10.40 9.47 8.67 7.96 7.33
    PTC-3000 204.08 50.95 22.72 19.90 17.62 15.68 14.08 12.73 11.56 10.52 9.63 8.84 8.14
    PTC-2500 219.38 54.77 24.43 21.39 18.94 16.86 15.14 13.69 12.42 11.31 10.36 9.51 8.75

    The weight per spool

    specification (mm) ≤0.05 >0.05~0.10 >0.10~0.15 >0.15~0.25
    Weight per spool Standard weight 20 30 100 300
    Lesser weight 10 20 50 100

    Elongation(%)

    Standard ≤0.05 >0.05~0.10 >0.10~0.15 >0.15~0.25
    Alloy wire (soft)elongation 10% 12% 16% 20%
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