Transistor Packages
Semiconductor Transistor Case Packages
TO-1, 3-lead round tall can [0.41 inches high]
TO-3, 3-Pin Through-Hole, Metal Case [case mount]
.. 4-Pin TO-3, Through-Hole, Metal Case [case mount]
.. 8-Pin TO-3, Through-Hole, Metal Case [case mount]
TO-5, Through-Hole, Metal Case [3-leads]
.. 8-Pin TO-5, Through-Hole, Metal Case [8-leads]
TO-6, 3-lead & threaded post [see TO-36 for a similar graphic]
TO-7, 4-lead round package with terminals placed in a straight line
TO-8, Through-Hole, Metal Case [12-leads]
TO-9 Metal Can, Axial Leads, .200 Pin Circle
TO-10 Stud Mount
TO-11 Metal Can, Axial Leads, Graphic to the left
TO-12 Metal Can Axial Leads, .200 Pin Circle
TO-18, Through-Hole, Metal Case
TO-23, 2-terminal, 3-leads, Through-Hole, Metal Case
TO-24, Flange Mount, Inactive [1987] see TO-213AA
TO-33, 4-Lead Through-Hole, Metal Can
TO-36, 3-terminal Large Round Can
TO-37, Flange Mount
TO-39, Through-Hole, Metal Case
.. 4-terminal TO-39, Through-Hole, Metal Case
.. 8-terminal TO-39, Through-Hole, Metal Case
.. 10-terminal TO-39, Through-Hole, Metal Case
TO-41 Flange Mount, Diamond Base, .430 Pin Circle [TO-41 Graphic]
TO-42 Axial Leads, .200 Pin Circle
TO-44 Axial Leads, .200 Pin Circle, elongate case [Inter-lead shield connected to case]
The TO-44 package is shown below.
TO-46, 2-Terminal Through-Hole, Metal Can, Axial Leads, .100 Pin Circle
.. 3-Pin TO-46, 3-Terminal Through-Hole, Metal Can
TO-48, Inactive [1996] see TO-208, 3-Terminal Bolt Mount
TO-52, Through-Hole, Metal Can
TO-53, Square flange mount, fixed terminals
TO-57, Round bolt mount, three terminal
TO-59, 3-terminal, Through-Hole, Stud Mount
TO-61, Through-Hole, Bolt Mount
TO-63, Through-Hole, Stud Mount
TO-64 3-Terminal Bolt Mount SCR Package
TO-66, 2-Terminal Through-Hole, Flange Mount
TO-66, 3-Terminal Through-Hole, Flange Mount
TO-71, 6-Lead Through-Hole, Metal Can
TO-72, Through-Hole, Metal Case
TO-73, 12 Axial Leads, .200 Pin Circle
TO-74, 10 Axial Leads, .200 Pin Circle
TO-75, 6 Axial Leads, .200 Pin Circle
TO-76, 8 Axial Leads, .200 Pin Circle
TO-77, 8 Axial Leads, .200 Pin Circle
TO-78, 8 Axial Leads, .200 Pin Circle, Through-Hole, Metal Case
TO-79, 8 Axial Leads, .200 Pin Circle
TO-80, 8 Axial Leads, .200 Pin Circle
TO-81, TO-82. Inactive JEDEC outlines as of 1987.
TO-83, 3-Terminal Bolt Mount SCR, Inactive JEDEC outline as of 1987
TO-92, Through-Hole, Plastic Body
TO-93. Inactive JEDEC outline as of 1996.
TO-94, Bolt mount, other leads are wires and cable.
TO-98. Inactive JEDEC outline as of 1996.
TO-99, 6-Lead Through-Hole, Metal Can
TO-102. Inactive JEDEC outline as of 1996.
TO-103, TO-104, TO-105, TO-106, TO-107, TO-108, TO-109. Inactive JEDEC outlines; 1987.
TO-111 package, 3-Terminal Bolt Mount Transistor Case
TO-119, TO-120, TO-121, TO-122. Inactive JEDEC outlines; 1987.
TO-130, TO-131, TO-132. Inactive JEDEC outlines; 1987.
TO-123, Flange Mount, Diamond-shape
TO-124, Flange Mount, Diamond-shape
TO-126, 3-Lead Through-Hole [see graphic to the upper left]
TO-127, TO-128, TO-129. Inactive JEDEC packages outlines as of 1996.
TO-201. Inactive JEDEC outline as of 1996.
TO-202, 3-Lead Through-Hole, with Metal Tab [see graphic to the left]
TO-204, Through-Hole, Metal Case
TO-205, also see TO-39 [although TO205 is the newer designation]
TO-206, check TO-18 for dimensions [although TO-206AA is the newer package]
TO-208 package, 3-Terminal Bolt Mount SCR
TO-218, see SOT-93
TO-220, 3-Lead Through-Hole, Plastic Case with Metal Tab
.. 5-PIn TO-220, 5 Straight-Lead Through-Hole, Plastic Case with Metal Tab
.. 5-Pin TO-220, 5 Staggered-Lead Through-Hole, Plastic Case with Metal Tab
.. 7-Pin TO-220, 7-Lead Through-Hole, Plastic Case with Metal Tab
TO-226, Through-Hole, Plastic Body
TO-236; 3-lead surface mount package [similar to a SOT-23]
TO-247, Through-Hole, Rear Tab
TO-248, and TO-249. Inactive JEDEC outline as of 1996.
TO-254, Through-Hole, Metal Tab
TO-255. Inactive JEDEC outline as of 1996.
TO-257, 3-Terminal Through-Hole, Metal Tab
TO-257, 2-Terminal Through-Hole, Metal Tab
TO-258, 3-Terminal Through-Hole, Metal Tab
TO-259, Through-Hole, Metal Plate
TO-261, 5-Terminal Surface Mount, including Tab
TO-263, 3-Terminal Surface Mount, with Tab
TO-263, 5-Terminal Surface Mount, with Tab
TO-263, 7-Terminal Surface Mount, with Tab
TO-276, Surface Mount 3-Pad
Screw Mount, Through-Hole, Metal Case
SOT-23; 3-lead surface mount package [similar to a TO-236]
SOT-23-6; 6-lead surface mount package [on the companion site]
SOT-93; 3-lead Through-Hole package
SOT-223; 4-lead surface mount package [1 lead is a tab]
Editor Note; All of the derating curves I've seen relating to transistor surface mount packages all appear identical, except that the vertical axis varies greatly. But they all start to be derated at 250C, with the curve falling off to zero power dissipation at 1500C.
An inactive package style does not imply that one may not be in service or used by a manufacturer. If the component has been in production since before the designation was retired, and continues to be produced than the same part designation will continued to be used. However if a new design is produced, that component will use the new JEDEC designation and not the older obsolete one.
