The invention concerns a plug-in connector (2) for a control apparatus (1). The plug-in connector (2) comprises at least one contact pin (30) which passes through a base section (21) of a support body (20) of the plug-in connector (20) and can be connected electrically and mechanically to a printed circuit board (40) of the control apparatus (1). The support body (20) of the plug-in connector (2) has a trough (28), which is formed by the base section (21), a groove (22) laterally surrounding the base section (21) and a side edge (23) laterally surrounding the groove (22), and can be filled with a sealing compound such that said compound extends within the trough (28) integrally from the groove (22) to the contact pin (30) and covers the base section (21) in certain places or completely. The invention also concerns a control apparatus (1) and a method for producing a control apparatus (1).