Solenoid coil including bobbin with moisture barrier

A bobbin comprising:

• a spool for supporting a coil winding, the spool including a first end and a second end opposite the first end, the coil winding being positioned between the first end and the second end;
• a flange connected to one of the first end and the second end, the flange having an outer edge;
• studs extending from the flange along an arc spaced a first distance from the outer edge;
• and
• a continuous ridge extending from the flange to form a moisture barrier between the outer edge and the studs, wherein the continuous ridge surrounds the studs and the arc, the continuous ridge being spaced a second distance from the outer edge that is less than the first distance, a ratio of the first distance to the second distance being in a range from about 4:1 to about 4:3 to reduce waviness in the outer edge of the flange, the continuous ridge being configured to bond to an overmold that encloses at least a portion of the bobbin.

An electrically insulative bobbin comprising:

• a spool for supporting a coil winding, the spool including a first end and a second end opposite the first end, the coil winding being positioned between the first end and the second end;
• a flange connected to one of the first end and the second end and defining an inner opening, the flange including an inner surface facing the coil winding and an outer surface facing away from the coil winding, the flange having a thickness defined between the inner surface and the outer surface;
• studs extending from the outer surface;
• and
• a continuous ridge extending from the outer surface to form a moisture barrier, wherein the continuous ridge surrounds the studs and circumscribes an inner area around the inner opening, the inner area being free of moisture barriers to allow liquid to flow from the studs towards the inner opening, the continuous ridge having a triangular shape in cross-section with a peak and forming an angle at the peak in a range from about 45° to about 90°, a ratio of the thickness of the flange to a height of the continuous ridge being in a range from about 25:4 to about 3:1, the peak adapted to fuse with an overmold that encloses at least a portion of the bobbin.