A small outline transistor (SOT) is a family of small footprint, discrete

surface mount Surface-mount technology (SMT), originally called planar mounting, is a method in which the electrical components are mounted directly onto the surface of a printed circuit board (PCB). An electrical component mounted in this manner is referred ...

transistor upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink). A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch e ...

commonly used in

consumer electronics Consumer electronics or home electronics are electronic (analog or digital) equipment intended for everyday use, typically in private homes. Consumer electronics include devices used for entertainment, communications and recreation. Usually r ...

. The most common SOT are SOT23 variations, link fro
amkor.com/packaging/leadframe/sot23-tsot
/ref> also manufacturers offer the nearly identical thin small outline transistor (TSOT) package, where lower height is important.

SOT23-3, SOT323, SOT416

The SOT23-3 package is very popular and a common package for transistors, and is also used for diodes and voltage regulators.

SOT23-5, SOT353, SOT553

SOT23-6, SOT363, SOT563

SOT23-8

SOT54

SOT54 is an alternate designation for the JEDEC

TO-92 The TO-92 is a widely used style of semiconductor package mainly used for transistors. The case is often made of epoxy or plastic, and offers compact size at a very low cost. History and origin The JEDEC TO-92 descriptor is derived from the ori ...

package.

SOT143, SOT343

SOT490

SOT89-3

The SOT89-3 electrically only has three leads (contact/pin). The wide lead (tab) is physically part of the middle lead on the other side of the package. Some call this package a SOT89-4, since it visually appears to have four leads when looking down at the part.

SOT89-5

The SOT89-5 electrically only has five leads (contact/pin). The middle lead is physically part of the middle lead on the other side of the package. Some call this package a SOT89-6, since it visually appears to have six leads when looking down at the part.

SOT223 (SOT223-4)

The SOT223-4 package is a popular package for voltage regulators. It was introduced by

Philips Koninklijke Philips N.V. (), commonly shortened to Philips, is a Dutch multinational conglomerate corporation that was founded in Eindhoven in 1891. Since 1997, it has been mostly headquartered in Amsterdam, though the Benelux headquarters i ...

SOT223-5

The SOT223-5 package is a popular package for voltage regulators.

SOT223-8

The SOT223-8 package is a popular package for bridged quad transistors.

References

{{Semiconductor packages Semiconductor packages