Primary Locking in General

Primary locking in general

The cable terminal is retained in position in the cavity using different types of locking catches. These locking catches are called primary locking.

There are two main types of primary locking:
- Primary locking in cavities
- Primary locking on cable terminals

Primary locking in cavities





Cable terminals without locking tab
The primary locking is permanently located in the housing as an integral part of the cavity.
Cable terminals without locking tabs are used with housings which have integral primary locking in the cavities. An example is the 1.6 Pin/Socket.

Primary locking on cable terminals





Cable terminals with locking tab
The primary locking tabs are located on the cable terminals.
Cable terminals can have either one locking tab (single primary locking) or two locking tabs (double primary locking).

Without primary locking




Some combinations of housing/cable terminal have no primary locking with lockable lock catches/locking tabs.
The cavities in the housing in these cases have integral catches which hold the cable terminals in place. When the secondary locking on the housing is opened the cable terminals can be lifted out. No terminal removal tool is needed.
An example is a housing with moisture proof cable terminals.

Release primary locking




A terminal removal tool is usually required to release the locking tab/locking catch so that the cable terminal can be extracted and removed.