3-14
Figure 3-8E.—Terminals. SOLDER CUP
PIN TERMINALS AND TURRET TERMINALS [view (A)] are single-post terminals, either
insulated or uninsulated, solid or hollow, stud or feed-through. Stud terminals protrude from one
side of a board; feed-throughs protrude from both sides.
BIFURCATED OR FORK TERMINALS [view (B)] are solid or hollow double-post terminals.
HOOK TERMINALS [view (C)] are made of cylindrical stock formed in the shape of a hook or
question mark.
PERFORATED OR PIERCED TERMINALS [view (D)] describe a class of terminals that uses a
hole pierced in flat metal for termination (e.g., terminal lugs).
SOLDER CUP TERMINALS [view (E)] are a common type found on connectors.
Turret and bifurcated terminals are used for interfacial connections on printed circuit boards,
terminal points for point-to-point wiring, mounting components, and as tie points for interconnecting
wiring. Hook terminals are used to provide connection points on sealed devices and terminal boards.
Terminals used for wire or component lead terminations are normally made of brass with a
solderable coating. Uninsulated terminals may be installed on an insulating substrate to form a terminal
board. They may also be added to a printed circuit board or installed on a metal chassis. Insulated
terminals are installed on a metal chassis.
ON-THE-BOARD TERMINATION.—On-the-board termination (figure 3-9) is also called LAP
FLOW termination. In a lap flow solder termination, the component lead does not pass through the circuit
board. This form of planar mounting may be used with both round and flat leads.
