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PTC-legering-wjerstânsdraad hat in middelgrutte wjerstân en in hege positive temperatuerkoëffisjint fan wjerstân.
It is in soad brûkt yn ferskate kachels. It kin automatysk de temperatuer kontrolearje en it fermogen oanpasse troch in konstante stroom te hâlden en de stroom te beheinen. Gemyske gearstalling:
| Namme | Koade | Haadkomposysje | | | | | |
| Fe | S | Ni | C | P | Standert |
| Temperatuergefoelige wjerstânslegering tried | PTC | Bal. | ≤0.01 | 77~82 | ≤ 0.05 | ≤0.01 | Q/320421PTC4500-2008 |
Spesifikaasjes en tolerânsjes
| 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 |
| Tolerânsje | ± 0,003 | ± 0,005 | ± 0.008 |
Temp. Koëffisjint fan wjerstân (20ºC)
| Type | PTC-4500 | PTC-4000 | PTC-3800 | PTC-3400 | PTC-3000 | PTC-2500 |
| 0~150ºC gemiddeld, PPM | 4500 | 4000 | 3800 | 3400 | 3000 | 2500 |
Wjerstân (20ºC) (μΩ.m)
| Type | PTC-4500 | PTC-4000 | PTC-3800 | PTC-3400 | PTC-3000 | PTC-2500 |
| by 20ºC-wjerstân ± 5% μΩ.m | 0.20 | 0.38 | 0.40 | 0.43 | 0.52 | 0.6 |
De tabel foar wjerstân
| Produkt | ±0,5%Ω/m | Diameter (mm) en dwerstrochsneed (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 |
It gewicht per spoel
| spesifikaasje (mm) | ≤0.05 | >0.05~0.10 | >0.10~0.15 | >0.15~0.25 |
| Gewicht per spoel | Standert gewicht | 20 | 30 | 100 | 300 |
| Minder gewicht | 10 | 20 | 50 | 100 |
Ferlinging (%)
| Standert | ≤0.05 | >0.05~0.10 | >0.10~0.15 | >0.15~0.25 |
| Legeringstried (sêfte) ferlinging | 10% | 12% | 16% | 20% |
Foarige: PTC-thermistorlegeringresistinsje NiFe28 NiFe30-tried is foar temperatuergefoelige resistinsje Folgjende: PTC-termistorlegeringsdraden foar temperatuergefoelige wjerstân