337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
142 | DF | .~ Fusible element actuated {15} |
227 | .~.~ Fuse link carrier or holder {2} | |
228 | DF | .~.~.~> Cartridge or tube {9} |
255 | DF | .~.~.~> Plug {5} |