Small-outline transistor

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Family of discrete surface mount transistors

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,. 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.

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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.⁶

SOT23 (TO236AB, SOT346, SC59A, TO236AA, SMT3), SOT323 (SC70-3, UMT3), SOT416 (SOT523, SC75A, SC90, EMT3)

	Dimensions (mm)
	SOT23⁷ ⁸ ⁹ ¹⁰	SOT23-3¹¹	SOT323¹² ¹³	SOT416¹⁴ ¹⁵
A	2.9	2.9	2.0
B	1.3/1.6	1.3/1.6	1.25
C
D
G	1.9	1.9	1.3	1.0
H
J
K
L	0.95	0.95	0.65	0.5
S				1.45 - 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)
	SOT23-5¹⁶ ¹⁷	SOT353¹⁸ ¹⁹	SOT553²⁰
A	2.90 ±0.10	2.0 ±0.2	1.60 ±0.10
B	1.60 ±0.10	1.25 ±0.10	1.20 +0.05 -0.10
C	1.04 – 1.44	0.8 – 1.1	0.60 +0.02 -0.05
D	0.350 –0.500	0.2 – 0.3	0.20 +0.10 -0.05
G	0.95	0.65	0.50
H	0.05 –0.15	≤0.1	0.00
J			0.15 +0.03 -0.05
K			0.20 ±0.10
S		2.0 – 2.2	1.60 +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)
	SOT23-6²¹ ²² ²³ ²⁴	SOT363²⁵ ²⁶	SOT563²⁷ ²⁸ ²⁹
A	2.9	2.0	1.60 ±0.10
B	1.625	1.25	1.20 +0.05 -0.10
C	1.25	0.95	0.60 +0.02 -0.05
D	0.4	0.25	0.20 +0.10 -0.05
G	0.95	0.65	0.50
H		0.1	0.00
J		0.18	0.15 +0.03 -0.05
K		0.38	0.20 ±0.10
S	2.8	2.1	1.60 +0.10 -0.05
V

SOT23-8

SOT23-8 (SOT28)³⁰ ³¹

	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.³²

SOT23-4, SOT143, SOT343

SOT23-4, SOT143 (TO253), SOT343

	Dimensions (mm)
	SOT143³³	SOT343³⁴
A	2.90 ±0.10	2.00 - 2.20
B	1.30 ±0.10	1.150 - 1.350
C		0.900 - 1.100
D	0.400 +0.110 -0.030	0.250 - 0.400
F	0.800 +0.130 -0.030	0.350 - 0.500
G	1.92 +0.11 -0.14	1.200 - 1.400
H	0.05 +0.05 -0.037	0.000 - 0.100
J	0.11 +0.07 -0.025	0.080 - 0.150
K	0.89 - 1.00	0.525
L
R
S	2.38 ±0.10	2.150 - 2.450

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)³⁵

	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.³⁶

SOT223-4 (SC73, TO261AA)³⁷ ³⁸ ³⁹

	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.

SOT223-5⁴⁰

	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)⁴¹

	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°

References

"SOT-23 and TSOT package datasheet" (PDF). Amkor Technology. 2021. Archived (PDF) from the original on December 19, 2018. Retrieved 2022-05-25. link from amkor.com/packaging/leadframe/sot23-tsot https://c44f5d406df450f4a66b-1b94a87d576253d9446df0a9ca62e142.ssl.cf2.rackcdn.com/2018/02/SOT23-TSOT_DS581.pdf ↩
"Nexperia SOT 23 Package and Dimensions". SOT23 and SOT 23-3 with the smaller body are also known as TO-236AB. http://www.nexperia.com/packages/SOT23.html ↩
"Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017. http://www.vishay.com/docs/72821/72821.pdf ↩
"Packaging Information". Intersil. Retrieved 4 May 2017. http://www.intersil.com/en/support/packaginginfo.html ↩
"Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017. http://www.vishay.com/docs/72821/72821.pdf ↩
"SOT-23 and TSOT package datasheet" (PDF). Amkor Technology. 2021. Archived (PDF) from the original on December 19, 2018. Retrieved 2022-05-25. link from amkor.com/packaging/leadframe/sot23-tsot https://c44f5d406df450f4a66b-1b94a87d576253d9446df0a9ca62e142.ssl.cf2.rackcdn.com/2018/02/SOT23-TSOT_DS581.pdf ↩
SOT23-3 package drawing; NXP.com https://www.nxp.com/docs/en/package-information/SOT23.pdf ↩
SOT23-3 dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/pdf/sot/SOT23_jumper.pdf ↩
SOT346 package drawing; NXP.com https://www.nxp.com/docs/en/package-information/SOT346.pdf ↩
SC59A dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/images/sot/SC59temp.gif ↩
SOT23-3 package drawing; union.ic.com http://www.union-ic.com/Upload/Datasheet/Datasheet_UM803_Rev03.pdf ↩
SOT323 package drawing; NXP.com https://www.nxp.com/docs/en/package-information/SOT323.pdf ↩
SC70-3 dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/pdf/sot/SC70-3L_Outline.pdf ↩
SOT416 package drawing; NXP.com https://www.nxp.com/docs/en/package-information/SOT416.pdf ↩
SC75A dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/images/sot/SC75A_Outline.gif ↩
SOT25 dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/pdf/sot/SOT25_Outline.pdf ↩
"SOT-23 and TSOT package datasheet" (PDF). Amkor Technology. 2021. Archived (PDF) from the original on December 19, 2018. Retrieved 2022-05-25. link from amkor.com/packaging/leadframe/sot23-tsot https://c44f5d406df450f4a66b-1b94a87d576253d9446df0a9ca62e142.ssl.cf2.rackcdn.com/2018/02/SOT23-TSOT_DS581.pdf ↩
SOT353 package drawing; NXP.com https://www.nxp.com/docs/en/package-information/SOT353.pdf ↩
SOT353 dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/pdf/sot/SOT353_outline.pdf ↩
"SOT553 package drawing; diodes.com" (PDF). https://www.diodes.com/assets/Package-Files/SOT553.pdf ↩
"SOT-23 and TSOT package datasheet" (PDF). Amkor Technology. 2021. Archived (PDF) from the original on December 19, 2018. Retrieved 2022-05-25. link from amkor.com/packaging/leadframe/sot23-tsot https://c44f5d406df450f4a66b-1b94a87d576253d9446df0a9ca62e142.ssl.cf2.rackcdn.com/2018/02/SOT23-TSOT_DS581.pdf ↩
"SOT457 Package information" (PDF). NXP. 2018-05-05. Retrieved 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 https://www.nxp.com/docs/en/package-information/SOT457.pdf ↩
"SOT26 dummy component package drawing" (PDF). topline.tv. 2015-09-24. Retrieved 2022-05-25. https://www.topline.tv/drawings/pdf/sot/SOT26_Outline.pdf ↩
"SOT 6L package drawing" (PDF). maximintegrated.com. Maxim Integrated. Retrieved 2022-05-25. https://pdfserv.maximintegrated.com/package_dwgs/21-0058.PDF ↩
"SOT363 Package information" (PDF). NXP. 2018-05-09. Retrieved 2021-09-07. plastic, surface-mounted package; 6 leads; 0.65 mm pitch; 2mm x 1.25 mm x 0.95 mm body https://www.nxp.com/docs/en/package-information/SOT363.pdf ↩
"SOT363 dummy component package drawing" (PDF). topline.tv. 2011-12-18. Retrieved 2022-05-25. https://www.topline.tv/drawings/pdf/sot/SOT363_outline.pdf ↩
"SOT563 package drawing" (PDF). diodes.com. Diodes. 2021-01-07. Retrieved 2022-05-25. https://www.diodes.com/assets/Package-Files/SOT563-Standard.pdf ↩
"SOT-563, SC-107C dimensions" (PDF). rohm.com. Rohm. 2016-09-09. Retrieved 2022-05-25. https://fscdn.rohm.com/en/products/databook/datasheet/discrete/transistor/bipolar/emh60-e.pdf#page=5 ↩
"ES6 package & packing information detail". toshiba.semicon-storage.com. Toshiba. Retrieved 2022-05-25. https://toshiba.semicon-storage.com/ap-en/semiconductor/design-development/package/detail.ES6.html ↩
"SOT-23 and TSOT package datasheet" (PDF). Amkor Technology. 2021. Archived (PDF) from the original on December 19, 2018. Retrieved 2022-05-25. link from amkor.com/packaging/leadframe/sot23-tsot https://c44f5d406df450f4a66b-1b94a87d576253d9446df0a9ca62e142.ssl.cf2.rackcdn.com/2018/02/SOT23-TSOT_DS581.pdf ↩
SOT28 dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/pdf/sot/SOT28_outline.pdf ↩
"TO-92 (SOT54)". Nexperia. 2004-11-16. Retrieved 2017-12-12. https://www.nexperia.com/packages/SOT54.html ↩
"SOT143 package drawing, diodes.com" (PDF). https://www.diodes.com/assets/Package-Files/SOT143.pdf ↩
"SOT343 package drawing; diodes.com" (PDF). https://www.diodes.com/assets/Package-Files/SOT343_Type-CJ.pdf ↩
SOT89-3 dummy component package drawing; TopLine.tv http://www.topline.tv/SOT89.html ↩
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. Vol. 1. pp. 264–270. doi:10.1109/PEDS.1995.404911. ISBN 0-7803-2423-4. S2CID 109636238. 0-7803-2423-4 ↩
SOT223-4 package drawing; NXP.com http://www.nxp.com/documents/outline_drawing/SOT223.pdf ↩
SOT223-4 dummy component package drawing; TopLine.tv http://www.topline.tv/drawings/pdf/sot/SOT223_Package_TopLine.pdf ↩
SOT223-4 package drawing; semicon-data.com http://www.semicon-data.com/js/geoms/SOT223.jpg ↩
SOT223-5 package drawing; semicon-data.com http://www.semicon-data.com/js/geoms/SOT223-5.jpg ↩
H-bridge MOSFET datasheet in SOT223-8 package; diodes.com https://www.diodes.com/assets/Datasheets/ZXMHN6A07T8.pdf ↩

SOT23, SOT323, SOT416

SOT23-5, SOT353, SOT553

SOT23-6, SOT363, SOT563

SOT23-8

SOT54

SOT23-4, SOT143, SOT343

SOT490

SOT89-3

SOT89-5

SOT223 (SOT223-4)

SOT223-5

SOT223-8

See also

References