Pin terminal, connector, wiring harness with connector and control unit

A pin terminal, comprising:

• a bar-like base material;
• and
• a plating layer covering a predetermined region of the base material,
• wherein:
• a constituent material of the base material is pure copper or a copper alloy,
• the plating layer includes a tin-based layer made of metal containing tin,
• one end side of the base material includes a tip covering portion covering an entire region in a circumferential direction of the base material,
• the tin-based layer includes the tip covering portion,
• the tip covering portion includes a thin film portion and a thick film portion at positions different in the circumferential direction of the base material,
• the thin film portion includes an outer layer and an inner layer provided in contact with the base material,
• a constituent material of the outer layer is pure tin,
• a constituent material of the inner layer is an alloy containing tin and copper,
• a thickness of the outer layer is 0.5 μm or more, and
• a thickness of the inner layer is 0.1 μm or more.