A terminal 25 for a thermally responsive switch has a surface portion 32 arranged to prevent solder or flux from entering a contact area of the switch during or after a soldering process. The surface portion can be textured, abraded, etched or stamped into the terminal. The texture can comprise lines that are diagonal (fig 8a), cross-hatched, extend away from the contact area, indented into or raised above the surface. The surface portion can comprise a line 34 between the texture and the contact area; that can be perpendicular to the flow of solder or flux, indented into or raised above the surface. The thermal switch can comprise an insulating housing (fig 1, 9) sandwiched by metal plates (fig 1, 4,11) connected to terminals (fig 1, 24, 25); a bimetallic actuator (fig 1, 6) and a heater (fig 1, 8) and be used to protect a motor from over heating.
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