The polarized ZE series housings incorporate a secure locking mechanism to prevent accidental disconnection due to the routing of wires or vibration. Available in 2 to 16 circuits, the locking mechanism is designed to allow the user to press down easily and, while grasping the wire for stability, release the assembly from the mating header. An audible click is heard and felt when connecting the housing assembly to the mating header. The housing is also notched on one side to indicate the location of pin 1.