| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 298 | DF | THERMALLY ACTUATED SWITCHES {7} |
| 333 | DF | .~ With bimetallic element {9} |
| 362 | DF | .~.~ Bimetallic element unitary with or directly actuates contacts {5} |
| 370 | DF | .~.~.~ With plural bimetallic elements {1} |
| 371 | ![]() | .~.~.~.~ Of diverse operating characteristics or responsive to diverse conditions |