Temperature sensitive pellet-type thermal fuse

A temperature-sensitive pellet-type thermal fuse, comprising in a tubular case with high electrical conductivity and high thermal conductivity:

• a temperature-sensitive pellet being capable of melting or softening at a specific temperature;
• a strong compression spring pressing the temperature-sensitive pellet;
• an insulating lid body closing an end portion of an opening of the tubular case;
• a weak compression spring being in contact with the insulating lid body;
• a first lead having an inner end penetrating the insulating lid body as a stationary contact;
• a movable contact electrically connected to the first lead and the tubular case;
• a second lead disposed at an end of the tubular case;
• a sealing resin shielding a proximal portion at an outer end of the first lead to seal an insulating tube provided between the end portion of the opening of the tubular case and the first lead in a sealed portion of the tubular case;
• and,
• wherein the sealing resin has
• a first seal resin filled between the end portion of the opening of the tubular case and an outer end face of the insulating lid body to fix the insulating tube and to shield the proximal portion at an outer end of the first lead, and
• a second seal resin sealing the end portion of the opening of the tubular case and outer end faces of the first lead and the first seal resin.