Direct plug-in compression spring terminal with retaining spring

A plug-in terminal for connecting an electrical conductor with a bus bar, comprising

• (a) a housing containing a first opening for receiving the electrical conductor and a second opening, said first opening having a longitudinal axis and said housing including a projection adjacent to said second opening and a contact portion on a side opposite said projection;
• (b) a clamping spring pivotally connected with said housing and including a clamping arm which pivots about a pivot axis in a clamping direction from an open condition in which the electrical conductor can be inserted into said housing via said opening and a clamping condition wherein said clamping arm biases the conductor against the bus bar;
• and
• (c) an actuator arranged in said housing second opening and including a catch portion, said actuator being operable in a shifting direction parallel to said longitudinal axis to pivot said clamping arm from said clamping condition to said open condition, said actuator engaging said housing contact portion when said clamping arm is in said open condition, said clamping arm biasing said actuator at an angle greater than 0° relative to said shifting direction when said clamping arm is in said open condition with said housing projection engaging said actuator catch portion to lock said actuator in a locked position.