Power supply apparatus

A power supply apparatus comprising:

• a board having a rectangular shape and including:
• a major surface on which a circuit element is mounted;
• a back surface;
• and
• pin terminals that are electrically connected to another device,
• the pin terminals extending in a direction away from the back surface of the board;
• and
• a case including:
• a cover portion (i) including a rectangular plate-shaped portion located at a distance from the board and (ii) covering the major surface of the board;
• and
• a plurality of corner-attachable leg portions extending from the cover portion toward the board and from the major surface to the back surface of the board,
• distal ends of the leg portions being located closer to the board than distal ends of the pin terminals,
• the case being attached to the board by the leg portions,
• each of the corner-attachable leg portions extending from a corresponding corner of four corners of the plate-shaped portion toward the board and engaging a corresponding corner portion of the board disposed at
• one of four corners of the board, the corner-attachable leg portions including:
• a first leg portion pair comprising a pair of leg portions including claws that are hooked on the major surface of the board, and
• a second leg portion pair comprising a pair of leg portions that is different from the pair of leg portions of the first leg portion pair,
• the second leg portion pair including claws that are hooked on the back surface of the board.