Electrolytic capacitor

An electrolytic capacitor comprising:

• a capacitor element including a pair of electrodes;
• an electrolyte interposed between the pair of electrodes;
• a pair of leads electrically connected to the pair of electrodes, respectively;
• a case in which the capacitor element and the electrolyte are accommodated, and that has an opening;
• a sealing member that seals the opening, and has a pair of insertion holes for leading out the leads;
• an insulating plate having a pair of through holes for leading out the leads;
• and
• a resin member filled between the sealing member and the insulating plate, wherein:
• the insulating plate has a resin bonding surface that abuts against the resin member, and a mounting surface opposed to the resin bonding surface, and includes at least one a recess on the resin bonding surface, and
• the recess is at least a combination of a plurality of recessed portions extending radially.

An electrolytic capacitor comprising:

• a capacitor element including a pair of electrodes;
• an electrolyte interposed between the pair of electrodes;
• a pair of leads electrically connected to the pair of electrodes, respectively;
• a case in which the capacitor element and the electrolyte are accommodated, and that has an opening;
• a sealing member that seals the opening, and has a pair of insertion holes for leading out the leads;
• an insulating plate having a pair of through holes for leading out the leads;
• and
• a resin member filled between the sealing member and the insulating plate, wherein:
• the insulating plate has a resin bonding surface that abuts against the resin member, and a mounting surface opposed to the resin bonding surface, and includes a protrusion on the resin bonding surface,
• the protrusion is at least a combination of a plurality of protruding portions extending radially, and
• the insulating plate has a resin injection hole extending therethrough from the resin bonding surface to the mounting surface between the pair of through holes.