| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
| 142 | DF | .~ Fusible element actuated {15} |
| 168 | DF | .~.~ Cutout or disconnect type (an assembly) of a fuse support and fuse holder with or without a fuse link) {3} |
| 180 | ![]() | .~.~.~ Line terminal or contact structure {1} |
| 181 | DF | .~.~.~.~> Directly connected by fusible element (e.g., in line-type fuse) |