| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 298 | DF | THERMALLY ACTUATED SWITCHES {7} |
| 333 | DF | .~ With bimetallic element {9} |
| 380 | ![]() | .~.~ Housing, casing or support structure {1} |
| 381 | DF | .~.~.~> With significant external circuit connection means |