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 ...

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. Usuall ...

. 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 or ...

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 is ...

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