| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
| 142 | DF | .~ Fusible element actuated {15} |
| 273 | DF | .~.~ With arc suppression or extinguishing means {6} |
| 280 | ![]() | .~.~.~ Cooling, condensing or absorbing means |