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]. SOT23-3 differs from SOT23 in a wider body of 1.6mm instead on 1.3mm, 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, SOT323, SOT416

The SOT23 package is very popular and a common package for transistors, and is also used for 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]
A	2.9	2.9	2.0
B	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)
	SOT23-5[15][1]	SOT353[16][17]	SOT553[18]
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)
	SOT23-6[1][19][20][21]	SOT363[22][23]	SOT563[24][25][26]
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)[1][27]
	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.[28]

SOT23-4, SOT143, SOT343

SOT23-4, SOT143 (TO253), SOT343
	Dimensions (mm)
	SOT143[29]	SOT343[30]
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)[31]
	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.[32]

SOT223-4 (SC73, TO261AA)[33][34][35]
	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[36]
	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)[37]
	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
"Nexperia SOT 23 Package and Dimensions".
"Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017.
"Packaging Information". Intersil. Retrieved 4 May 2017.
"Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017.
SOT23-3 package drawing; NXP.com
SOT23-3 dummy component package drawing; TopLine.tv
SOT346 package drawing; NXP.com
SC59A dummy component package drawing; TopLine.tv
SOT23-3 package drawing; union.ic.com
SOT323 package drawing; NXP.com
SC70-3 dummy component package drawing; TopLine.tv
SOT416 package drawing; NXP.com
SC75A dummy component package drawing; TopLine.tv
SOT25 dummy component package drawing; TopLine.tv
SOT353 package drawing; NXP.com
SOT353 dummy component package drawing; TopLine.tv
"SOT553 package drawing; diodes.com" (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
"SOT26 dummy component package drawing" (PDF). topline.tv. 2015-09-24. Retrieved 2022-05-25.
"SOT 6L package drawing" (PDF). maximintegrated.com. Maxim Integrated. Retrieved 2022-05-25.
"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
"SOT363 dummy component package drawing" (PDF). topline.tv. 2011-12-18. Retrieved 2022-05-25.
"SOT563 package drawing" (PDF). diodes.com. Diodes. 2021-01-07. Retrieved 2022-05-25.
"SOT-563, SC-107C dimensions" (PDF). rohm.com. Rohm. 2016-09-09. Retrieved 2022-05-25.
"ES6 package & packing information detail". toshiba.semicon-storage.com. Toshiba. Retrieved 2022-05-25.
SOT28 dummy component package drawing; TopLine.tv
"TO-92 (SOT54)". Nexperia. 2004-11-16. Retrieved 2017-12-12.
"SOT143 package drawing, diodes.com" (PDF).
"SOT343 package drawing; diodes.com" (PDF).
SOT89-3 dummy component package drawing; TopLine.tv
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.
SOT223-4 package drawing; NXP.com
SOT223-4 dummy component package drawing; TopLine.tv
SOT223-4 package drawing; semicon-data.com
SOT223-5 package drawing; semicon-data.com
H-bridge MOSFET datasheet in SOT223-8 package; diodes.com

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[Ankor-SOT23-1] "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

[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] SOT23-3 package drawing; union.ic.com

[11] SOT323 package drawing; NXP.com

[12] SC70-3 dummy component package drawing; TopLine.tv

[13] SOT416 package drawing; NXP.com

[14] SC75A dummy component package drawing; TopLine.tv

[15] SOT25 dummy component package drawing; TopLine.tv

[16] SOT353 package drawing; NXP.com

[17] SOT353 dummy component package drawing; TopLine.tv

[18] "SOT553 package drawing; diodes.com" (PDF).

[NXP-SOT457-19] "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

[TopLine_SOT26-20] "SOT26 dummy component package drawing" (PDF). topline.tv. 2015-09-24. Retrieved 2022-05-25.

[Maxim_SOT6L-21] "SOT 6L package drawing" (PDF). maximintegrated.com. Maxim Integrated. Retrieved 2022-05-25.

[NXP-SOT363-22] "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

[TopLine_SOT363-23] "SOT363 dummy component package drawing" (PDF). topline.tv. 2011-12-18. Retrieved 2022-05-25.

[diodes_SOT563-24] "SOT563 package drawing" (PDF). diodes.com. Diodes. 2021-01-07. Retrieved 2022-05-25.

[Rohm_-25] "SOT-563, SC-107C dimensions" (PDF). rohm.com. Rohm. 2016-09-09. Retrieved 2022-05-25.

[toshiba_ES6-26] "ES6 package & packing information detail". toshiba.semicon-storage.com. Toshiba. Retrieved 2022-05-25.

[27] SOT28 dummy component package drawing; TopLine.tv

[28] "TO-92 (SOT54)". Nexperia. 2004-11-16. Retrieved 2017-12-12.

[29] "SOT143 package drawing, diodes.com" (PDF).

[30] "SOT343 package drawing; diodes.com" (PDF).

[31] SOT89-3 dummy component package drawing; TopLine.tv

[32] 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.

[33] SOT223-4 package drawing; NXP.com

[34] SOT223-4 dummy component package drawing; TopLine.tv

[35] SOT223-4 package drawing; semicon-data.com

[36] SOT223-5 package drawing; semicon-data.com

[37] H-bridge MOSFET datasheet in SOT223-8 package; diodes.com

Semiconductor packages
Single diode	DO-201 (DO-27) DO-204 (DO-7 / DO-26 / DO-35 / DO-41) DO-213 (MELF / SOD-80 / LL34) DO-214 (SMA / SMB / SMC) SOD (SOD-123 / SOD-323 / SOD-523 / SOD-923)
3...5-pin	SOT / TSOT TO-3 (TH / Panel) TO-5 (TH) TO-8 (TH) TO-18 (TH) TO-39 (TH) TO-66 (TH / Panel) TO-92 (TH) TO-126 (TH / Panel) TO-202 (TH / Panel) TO-220 (TH / Panel) TO-247 (TH / Panel) TO-251 (IPAK) (SMT) TO-252 (DPAK) (SMT) TO-262 (I2PAK) (SMT) TO-263 (D2PAK) (SMT) TO-268 (D3PAK) (SMT) TO-273 (Super-220) (SMT) TO-274 (Super-247) (SMT)
Single row	SIP / SIL
Dual row	DFN DIP / DIL Flat Pack MSOP SO / SOIC SOP / SSOP TSOP / HTSOP TSSOP / HTSSOP ZIP
Quad row	LCC QIP / QIL PLCC QFN QFP QUIP / QUIL
Grid array	BGA eWLB LGA PGA
Wafer	COB COF COG CSP Flip Chip PoP QP UICC WL-CSP / WLP
Related topics	Electronic packaging Integrated circuit packaging List of integrated circuit packaging types Printed circuit board Surface-mount technology Through-hole technology
It is relatively common to find packages that contain other components than their designated ones, such as diodes or voltage regulators in transistor packages, etc.