| 種類の記号 | 素線径 (mm) | 常用温度 ※1 (℃) | 過熱使用限度 ※2 (℃) |
| B | 0.5 | 1500 | 1700 |
| R | 0.5 | 1400 | 1600 |
| S | 0.5 | 1400 | 1600 |
| N | 0.65 | 850 | 900 |
| 1 | 950 | 1000 | |
| 1.6 | 1050 | 1100 | |
| 2.3 | 1100 | 1150 | |
| 3.2 | 1200 | 1250 | |
| K | 0.32 | 550 | 750 |
| 0.65 | 650 | 850 | |
| 1 | 750 | 950 | |
| 1.6 | 850 | 1050 | |
| 2.3 | 900 | 1100 | |
| 3.2 | 1000 | 1200 | |
| E | 0.65 | 450 | 500 |
| 1 | 500 | 550 | |
| 1.6 | 550 | 600 | |
| 2.3 | 600 | 750 | |
| 3.2 | 700 | 800 | |
| J | 0.65 | 400 | 500 |
| 1 | 450 | 550 | |
| 1.6 | 500 | 650 | |
| 2.3 | 550 | 750 | |
| 3.2 | 600 | 750 | |
| T | 0.32 | 200 | 250 |
| 0.65 | 200 | 250 | |
| 1 | 250 | 300 | |
| 1.6 | 300 | 350 |