Small-outline transistor explained

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

SOT23, SOT323, SOT416

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

SOT23 (TO236AB, SOT346, SC59A, TO236AA, SMT3),
SOT323 (SC70-3, UMT3),
SOT416 (SOT523, SC75A, SC90, EMT3)
Dimensions (mm)
SOT23[6] [7] [8] [9] SOT23-3[10] SOT323[11] [12] SOT416[13] [14]
A2.92.92.0
B1.3/1.61.3/1.61.25
C
D
G1.91.91.31.0
H
J
K
L0.950.950.650.5
S1.45 - 1.75
V

SOT23-5, SOT353, SOT553

SOT23-5 (SOT25, SC74A, TSOP-5, SOT753, MO-178AA, SMT5),
SOT353 (SC70-5, SC88A, TSSOP-5, UMT5), SOT553
Dimensions (mm)
SOT23-5[15] SOT353[16] [17] SOT553[18]
A2.90 ±0.102.0 ±0.21.60 ±0.10
B1.60 ±0.101.25 ±0.101.20 +0.05 -0.10
C1.04  - 1.440.8  - 1.10.60 +0.02 -0.05
D0.350  - 0.5000.2  - 0.30.20 +0.10 -0.05
G0.950.650.50
H0.05  - 0.15≤0.10.00
J0.15 +0.03 -0.05
K0.20 ±0.10
S2.0  - 2.21.60 +0.10 -0.05
V

SOT23-6, SOT363, SOT563

SOT23-6 (SOT26, SC59-6, SC74, TSOP-6, MO-178AB, SMT6, SM6, Mini6, SOT457),
SOT363 (SC70-6, SC88, TSSOP-6, UMT6, US6, S-Mini6),
SOT563 (SC-107C, ES6)
Dimensions (mm)
SOT23-6[19] [20] [21] SOT363[22] [23] SOT563[24] [25] [26]
A2.92.01.60 ±0.10
B1.6251.251.20 +0.05 -0.10
C1.250.950.60 +0.02 -0.05
D0.40.250.20 +0.10 -0.05
G0.950.650.50
H0.10.00
J0.180.15 +0.03 -0.05
K0.380.20 ±0.10
S2.82.11.60 +0.10 -0.05
V

SOT23-8

SOT23-8 (SOT28)[27]
Dimensions (mm)
A2.90 ± 0.10
B1.60 ± 0.10
C1.27
D0.3
G0.650 typ.
H0.0762
J0.152
K0.575
S2.80 ± 0.20
L

SOT54

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

SOT23-4, SOT143, SOT343

SOT23-4, SOT143 (TO253), SOT343
Dimensions (mm)
SOT143[29] SOT343[30]
A2.90 ±0.102.00 - 2.20
B1.30 ±0.101.150 - 1.350
C0.900 - 1.100
D0.400 +0.110 -0.0300.250 - 0.400
F0.800 +0.130 -0.0300.350 - 0.500
G1.92 +0.11 -0.141.200 - 1.400
H0.05 +0.05 -0.0370.000 - 0.100
J0.11 +0.07 -0.0250.080 - 0.150
K0.89 - 1.000.525
L
R
S2.38 ±0.102.150 - 2.450

SOT490

SOT490 (SOT523F, SC89, EMT3F)
Dimensions (mm)
A
B
C
D
G0.5
J
K
S
L1.0

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)[31]
Dimensions (mm)
A4.5
B2.5
C1.5 ± 0.1
D
E1.6
F
G1.5
J
K
S
L3

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)
A4.6
B2.6
C1.6
D
E
F
G1.5
H
J
K
S
L

SOT223 (SOT223-4)

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

SOT223-4 (SC73, TO261AA)[33] [34] [35]
Dimensions (mm)
MinTypMax
A1.80
A10.02
b0.600.700.80
b22.903.003.10
c0.240.260.32
D6.306.506.70
e2.3
e14.6
E6.707.007.30
E13.303.503.70

SOT223-5

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

SOT223-5[36]
Dimensions (mm)
MinTypMax
A1.8
A10.020.040.10
A21.551.65
A30.870.91
b0.410.460.51
b22.953.003.05
C0.240.32
D6.456.506.55
E6.867.007.26
E13.453.503.55
e1.27
e15.08
L0.911.14

SOT223-8

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

SOT223-8 (SM-8)[37]
Dimensions (mm)
MinTypMax
A1.601.70
A10.020.040.10
b0.700.800.90
c0.240.280.32
D6.306.606.70
e1.53
e14.59
E6.707.007.30
E13.303.503.70
L0.750.901.00
ø45°
ø115°
ø210°

See also

Notes and References

  1. Web site: SOT-23 and TSOT package datasheet . Amkor Technology . 2021 . 2022-05-25 . https://web.archive.org/web/20181219144712/https://c44f5d406df450f4a66b-1b94a87d576253d9446df0a9ca62e142.ssl.cf2.rackcdn.com/2018/02/SOT23-TSOT_DS581.pdf . December 19, 2018 . live . link from amkor.com/packaging/leadframe/sot23-tsot
  2. Web site: Nexperia SOT 23 Package and Dimensions. SOT23 and SOT 23-3 with the smaller body are also known as TO-236AB.
  3. Web site: Thin SOT-23 Package Information. Vishay Siliconix. 4 May 2017.
  4. Web site: Packaging Information. Intersil. 4 May 2017.
  5. Web site: Thin SOT-23 Package Information. Vishay Siliconix. 4 May 2017.
  6. https://www.nxp.com/docs/en/package-information/SOT23.pdf SOT23-3 package drawing; NXP.com
  7. http://www.topline.tv/drawings/pdf/sot/SOT23_jumper.pdf SOT23-3 dummy component package drawing; TopLine.tv
  8. https://www.nxp.com/docs/en/package-information/SOT346.pdf SOT346 package drawing; NXP.com
  9. http://www.topline.tv/drawings/images/sot/SC59temp.gif SC59A dummy component package drawing; TopLine.tv
  10. http://www.union-ic.com/Upload/Datasheet/Datasheet_UM803_Rev03.pdf SOT23-3 package drawing; union.ic.com
  11. https://www.nxp.com/docs/en/package-information/SOT323.pdf SOT323 package drawing; NXP.com
  12. http://www.topline.tv/drawings/pdf/sot/SC70-3L_Outline.pdf SC70-3 dummy component package drawing; TopLine.tv
  13. https://www.nxp.com/docs/en/package-information/SOT416.pdf SOT416 package drawing; NXP.com
  14. http://www.topline.tv/drawings/images/sot/SC75A_Outline.gif SC75A dummy component package drawing; TopLine.tv
  15. http://www.topline.tv/drawings/pdf/sot/SOT25_Outline.pdf SOT25 dummy component package drawing; TopLine.tv
  16. https://www.nxp.com/docs/en/package-information/SOT353.pdf SOT353 package drawing; NXP.com
  17. http://www.topline.tv/drawings/pdf/sot/SOT353_outline.pdf SOT353 dummy component package drawing; TopLine.tv
  18. Web site: SOT553 package drawing; diodes.com.
  19. Web site: SOT457 Package information . . 2018-05-05 . . 2022-05-25 . plastic, surface-mounted package (TSOP6); 6 leads; 0.95 mm pitch; 2.9 mm x 1.5 mm x 1 mm body.
  20. Web site: SOT26 dummy component package drawing . topline.tv . 2015-09-24 . 2022-05-25.
  21. Web site: SOT 6L package drawing . maximintegrated.com . . 2022-05-25.
  22. Web site: SOT363 Package information . . 2018-05-09 . . 2021-09-07 . plastic, surface-mounted package; 6 leads; 0.65 mm pitch; 2mm x 1.25 mm x 0.95 mm body.
  23. Web site: SOT363 dummy component package drawing . topline.tv . 2011-12-18 . 2022-05-25.
  24. Web site: SOT563 package drawing . diodes.com . . 2021-01-07 . 2022-05-25.
  25. Web site: SOT-563, SC-107C dimensions . rohm.com . . 2016-09-09 . 2022-05-25.
  26. Web site: ES6 package & packing information detail . toshiba.semicon-storage.com . . 2022-05-25.
  27. http://www.topline.tv/drawings/pdf/sot/SOT28_outline.pdf SOT28 dummy component package drawing; TopLine.tv
  28. Web site: TO-92 (SOT54) . Nexperia . 2004-11-16 . 2017-12-12.
  29. Web site: SOT143 package drawing, diodes.com.
  30. Web site: SOT343 package drawing; diodes.com.
  31. http://www.topline.tv/SOT89.html SOT89-3 dummy component package drawing; TopLine.tv
  32. Book: Hollander, Dave. Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95 . Packaging trends and mounting techniques for power surface mount components . 1995. 1. 264–270. 10.1109/PEDS.1995.404911. 0-7803-2423-4. 109636238 .
  33. http://www.nxp.com/documents/outline_drawing/SOT223.pdf SOT223-4 package drawing; NXP.com
  34. http://www.topline.tv/drawings/pdf/sot/SOT223_Package_TopLine.pdf SOT223-4 dummy component package drawing; TopLine.tv
  35. http://www.semicon-data.com/js/geoms/SOT223.jpg SOT223-4 package drawing; semicon-data.com
  36. http://www.semicon-data.com/js/geoms/SOT223-5.jpg SOT223-5 package drawing; semicon-data.com
  37. https://www.diodes.com/assets/Datasheets/ZXMHN6A07T8.pdf H-bridge MOSFET datasheet in SOT223-8 package; diodes.com

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