Outdoor unit of air-conditioning apparatus having terminal-block mounting portion with terminal-block seat

An outdoor unit of an air-conditioning apparatus, which is provided with a heat exchanger, an outdoor fan, a compressor, and an electrical component that are provided in a casing of the outdoor unit, the outdoor unit comprising:

• terminal blocks to be connected to the electrical component;
• and
• a terminal-block mounting portion provided to face from an inside of the casing toward an outside of the casing,
• wherein the terminal blocks are arranged in a height direction of the terminal-block mounting portion, and include
• a first terminal block located on a lower side of the terminal-block mounting portion, and
• a second terminal block located on an upper side of the terminal-block mounting portion,
• wherein the second terminal block is mounted on a terminal-block seat provided on the terminal-block mounting portion,
• wherein the terminal-block seat includes
• a mounting portion on which the second terminal block is mounted, and
• a fixed portion that is in contact with the terminal-block mounting portion,
• wherein the fixed portion is smaller in area than the mounting portion,
• wherein the mounting portion is formed in such a manner as to protrude from the fixed portion toward the first terminal block, and
• wherein the mounting portion protrudes further toward the first terminal block than the fixed portion protrudes toward the first terminal block.