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Small-outline transistor

Family of discrete surface mount transistors From Wikipedia, the free encyclopedia

Small-outline transistor
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A small outline transistor (SOT) is a family of small footprint, discrete surface mount transistor commonly used in consumer electronics. The most common SOT are SOT23 variations,.[1] SOT23-5 differs from SOT23 in a wider body of 1.6 mm (0.063 in) instead of 1.3 mm (0.051 in). Also, manufacturers offer the nearly identical thin small outline transistor (TSOT/TSOP) package, where lower height is important.[2][3][4][5]

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Size comparison of transistor packages. Two surface-mount packages, SOT23 and SOT223, are shown next to through-hole packages
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SOT23, SOT323, SOT416

The SOT23 package is very popular and a common package for transistors, as well as diodes and voltage regulators.[1]

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SOT23-5, SOT353, SOT553

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SOT23-6, SOT363, SOT563

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SOT23-8

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SOT54

SOT54 is an alternate designation for the JEDEC TO-92 package.[28]

SOT23-4, SOT143, SOT343

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SOT490

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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.

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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.

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SOT223 (SOT223-4)

The SOT223-4 package is a popular package for voltage regulators. It was introduced by Philips.[32]

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SOT223-5

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

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SOT223-8

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

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See also

References

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