PTC Thermistor Alloy Resistance Wire

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The PTC thermistor alloy resistance wire provides medium resistivity and high positive temperature coefficient of resistance. In addition, it is durable and long lasting. The PTC alloy wire is widely used in a variety of electrical heaters with automatic temperature control and power adjustment capacities.

Chemical Composition
Name Code Main Composition (%) Standard
Fe S Ni C P
PTC Thermistor Alloy Resistance Wire PTC Bal. ≤0.01 77~82 ≤0.05 ≤0.01 Q/320421PTC4500-2008

Note: we can also offer alloy wires of special compositions according the contract.

Properties
Temp. Coefficient of Resistance (20℃) (αx 10﹣6/℃)

Alloy Code P-4500 P-4000 P-3800 P-3500 P-3000 P-2500
0-150℃(average) x10%Z 4500 ≥4000 ≥3800 ≥3500 ≥3000 ≥2500

Resistivity (20℃) (µΩ*m)
Alloy Code P-4500 P-4000 P-3800 P-3500 P-3000 P-2500
Resistivity(20℃)(µΩ*m)+5% 0.19 0.25 0.27 0.36 0.40 0.43

The Table for Resistance per Meter
Product 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 0.038 0.0415 0.0452 0.0491
P-4500 +0.5% Ω/m 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
P-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
P-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
P-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
P-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
P-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
Dia. (mm) ≤0.05 >0.05-0.10 >0.10-0.15 >0.15-0.25
Weight per spool (g), ≥ Standard weight 20 30 100 300
Lesser weight 10 20 50 100

Tensile Strength
The tensile strength of soft alloy resistance wire shall be greater than or equal to 390MPa.

Elongation (%)
Dia. mm ≤0.05 >0.05-0.10 >0.10-0.15 >0.15-0.25
Alloy wire (soft) elongation 20 30 100 300
10% 12% 16% 20%

We can offer hard alloy wire, and the elongation is optional.

Diameters and Tolerances
Dia. mm 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

As a specialized PTC thermistor alloy resistance wire manufacturer and supplier in China, Senphus also offers silicone rubber heating wire, black rubber heating pad, nonmagnetic heating wire/cable, heating cable with transformer, and more.

Related Names:
Medium Resistivity Wire | Durable Resistance Wire | PTC Resistance Wires

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