A disconnect plunger for use in an integrated drive generator comprising: a plunger body extending between a first end and a second end, there being a cam surface formed on said second end, said cam surface having a cylindrical cam portion extending across said second end, and said cylindrical cam portion includes at least a location formed at a first radius about a point spaced beyond said second end relative to said first end, and a first distance being defined from a second end facing surface of a cylindrical guide portion positioned intermediate the first and second end and to said point, and a ratio of said first radius to said first distance being between.15 and.30; and said point being spaced in a direction perpendicular to a center axis of said plunger body, and spaced from said center axis by a second distance, and a ratio of said second distance to said first radius being between.25 and.40; wherein a third distance is defined to an end of said cam surface spaced closest to said first end, and from said second end facing surface of said cylindrical guide portion, and a fourth distance is defined from said second end facing surface of said cylindrical guide portion to an enlarged portion surface of an enlarged portion extending to said first end, said enlarged portion surface spaced toward said second end from said first end, and a ratio of said third distance to said fourth distance being between.9 and 1.1; wherein said enlarged portion includes a notch for receiving a solenoid plunger; wherein an angle is defined by a first line and a second line, said second line formed parallel to a cam face on said cam surface that extends to said cylindrical cam portion, said first line being defined from a center axis of said plunger body perpendicular to a third line which extends from said center axis and bisects said notch, and said angle is between 5.0 and 7.5 degrees; wherein a fifth distance is defined as a distance that said second line is spaced from said cam face, and a ratio of said first radius to said fifth distance is between 14 and 20. a plunger body extending between a first end and a second end, there being a cam surface formed on said second end, said cam surface having a cylindrical cam portion extending across said second end, and said cylindrical cam portion includes at least a location formed at a first radius about a point spaced beyond said second end relative to said first end, and a first distance being defined from a second end facing surface of a cylindrical guide portion positioned intermediate the first and second end and to said point, and a ratio of said first radius to said first distance being between.15 and.30; and said point being spaced in a direction perpendicular to a center axis of said plunger body, and spaced from said center axis by a second distance, and a ratio of said second distance to said first radius being between.25 and.40; wherein a third distance is defined to an end of said cam surface spaced closest to said first end, and from said second end facing surface of said cylindrical guide portion, and a fourth distance is defined from said second end facing surface of said cylindrical guide portion to an enlarged portion surface of an enlarged portion extending to said first end, said enlarged portion surface spaced toward said second end from said first end, and a ratio of said third distance to said fourth distance being between.9 and 1.1; wherein said enlarged portion includes a notch for receiving a solenoid plunger; wherein an angle is defined by a first line and a second line, said second line formed parallel to a cam face on said cam surface that extends to said cylindrical cam portion, said first line being defined from a center axis of said plunger body perpendicular to a third line which extends from said center axis and bisects said notch, and said angle is between 5.0 and 7.5 degrees; wherein a fifth distance is defined as a distance that said second line is spaced from said cam face, and a ratio of said first radius to said fifth distance is between 14 and 20.