Small-outline transistor

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] also manufacturers offer the nearly identical thin small outline transistor (TSOT) package, where lower height is important.[2][3] [4][5]

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

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.[1]

SOT23-3 (SOT23, TO236AB, SOT346, SC59A, TO236AA, SMT3),
SOT323 (SC70-3, UMT3),
SOT416 (SOT523, SC75A, SC90, EMT3)
Dimensions (mm)
SOT23-3[6][7][8][9] SOT323[10][11] SOT416[12][13]
A
B
C
D
G 1.9 1.3 1.0
H
J
K
L 0.95 0.65 0.5
S
V

SOT23-5, SOT353
SOT23-5 (SOT25, SC74A, SOT753, MO-178AA, SMT5),
SOT353 (SC70-5, SC88A, TSSOP-5, UMT5)
Dimensions (mm)
SOT23-5[14][1] SOT353[15][16]
A 2.90±0.10 2.0±0.2
B 1.60±0.10 1.25±0.10
C 1.04–1.44 0.8–1.1
D 0.350–0.500 0.2–0.3
G 0.95 0.65
H 0.05–0.15 ≤0.1
J
K
S 2.0–2.2
V

SOT23-6, SOT363
SOT23-6 (SOT26, SC59-6, SC74, TSOP-6, MO-178AB, SMT6, SM6, Mini6, SOT457),
SOT363 (SC70-6, SC88, TSSOP-6, UMT6, US6, S-Mini6)
Dimensions (mm)
SOT23-6[1][17][18][19] SOT363[20][21]
A 2.9 2.0
B 1.625 1.25
C 1.25 0.95
D 0.4 0.25
G 0.95 0.65
H 0.1
J 0.18
K 0.38
S 2.8 2.1
V

SOT23-8
SOT23-8 (SOT28)[1][22]
Dimensions (mm)
A 2.90 ± 0.10
B 1.60 ± 0.10
C 1.27
D 0.3
G 0.650 typ.
H 0.0762
J 0.152
K 0.575
S 2.80 ± 0.20
L

SOT54

SOT54 is an alternate designation for the JEDEC TO-92 package.[23]

SOT143, SOT343
SOT143 (TO253), SOT343
Dimensions (mm)
SOT143 SOT343
A
B
C
D
F
G 1.78 1.2
H
J
K
L
R
S

SOT490
SOT490 (SOT523F, SC89, EMT3F)
Dimensions (mm)
A
B
C
D
G 0.5
J
K
S
L 1.0

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.

SOT89-3 (TO243AA, SC62, MPT3)[24]
Dimensions (mm)
A 4.5
B 2.5
C 1.5 ± 0.1
D
E 1.6
F
G 1.5
J
K
S
L 3

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.

SOT89-5
Dimensions (mm)
A 4.6
B 2.6
C 1.6
D
E
F
G 1.5
H
J
K
S
L

SOT223 (SOT223-4)

The SOT223-4 package is a popular package for voltage regulators. It was introduced by Philips.[25]

SOT223-4 (SC73, TO261AA)[26][27][28]
Dimensions (mm)
Min Typ Max
A 1.80
A1 0.02
b 0.60 0.70 0.80
b2 2.90 3.00 3.10
c 0.24 0.26 0.32
D 6.30 6.50 6.70
e 2.3
e1 4.6
E 6.70 7.00 7.30
E1 3.30 3.50 3.70

SOT223-5

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

SOT223-5[29]
Dimensions (mm)
Min Typ Max
A 1.8
A1 0.02 0.04 0.10
A2 1.55 1.65
A3 0.87 0.91
b 0.41 0.46 0.51
b2 2.95 3.00 3.05
C 0.24 0.32
D 6.45 6.50 6.55
E 6.86 7.00 7.26
E1 3.45 3.50 3.55
e 1.27
e1 5.08
L 0.91 1.14

SOT223-8

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

SOT223-8 (SM-8)[30]
Dimensions (mm)
Min Typ Max
A 1.60 1.70
A1 0.02 0.04 0.10
b 0.70 0.80 0.90
c 0.24 0.28 0.32
D 6.30 6.60 6.70
e 1.53
e1 4.59
E 6.70 7.00 7.30
E1 3.30 3.50 3.70
L 0.75 0.90 1.00
ø 45°
ø1 15°
ø2 10°
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See also
  • List of electronics package dimensions

References
  1. "SOT-23 and TSOT package datasheet" (PDF). Amkor Technology. Archived (PDF) from the original on December 19, 2018. Retrieved December 19, 2018. link from https://amkor.com/packaging/leadframe/sot23-tsot/
  2. "Nexperia SOT 23 Package and Dimensions".
  3. "Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017.
  4. "Packaging Information". Intersil. Retrieved 4 May 2017.
  5. "Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017.
  6. SOT23-3 package drawing; NXP.com
  7. SOT23-3 dummy component package drawing; TopLine.tv
  8. SOT346 package drawing; NXP.com
  9. SC59A dummy component package drawing; TopLine.tv
  10. SOT323 package drawing; NXP.com
  11. SC70-3 dummy component package drawing; TopLine.tv
  12. SOT416 package drawing; NXP.com
  13. SC75A dummy component package drawing; TopLine.tv
  14. SOT25 dummy component package drawing; TopLine.tv
  15. SOT353 package drawing; NXP.com
  16. SOT353 dummy component package drawing; TopLine.tv
  17. SOT457 package drawing; NXP.com
  18. SOT26 dummy component package drawing; TopLine.tv
  19. STO?L (MAXIMS) package drawing; maximintegrated.com
  20. SOT363 package drawing; NXP.com
  21. SOT363 dummy component package drawing; TopLine.tv
  22. SOT28 dummy component package drawing; TopLine.tv
  23. "TO-92 (SOT54)". Nexperia. 2004-11-16. Retrieved 2017-12-12.
  24. SOT89-3 dummy component package drawing; TopLine.tv
  25. Hollander, Dave (1995). "Packaging Trends and Mounting Techniques for Power Surface Mount Components". Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95. 1: 264–270. doi:10.1109/PEDS.1995.404911. ISBN 0-7803-2423-4.
  26. SOT223-4 package drawing; NXP.com
  27. SOT223-4 dummy component package drawing; TopLine.tv
  28. SOT223-4 package drawing; semicon-data.com
  29. SOT223-5 package drawing; semicon-data.com
  30. H-bridge MOSFET datasheet in SOT223-8 package; diodes.com
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