Small-outline transistor

A small outline transistor (SOT) is a small footprint, discrete surface mount transistor commonly used in consumer electronics.

Many manufacturers^[1]^[2] ^[3]^[4] also offer the nearly identical thin small outline transistor (TSOT) package for use in electronic circuits where height is an important consideration.

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.

SOT23-3 (SOT23, TO236AB, SOT346, SC59A, TO236AA, SMT3),
SOT323 (SC70-3, UMT3),
SOT416 (SOT523, SC75A, SC90, EMT3)
	Dimensions (mm)
	SOT23-3^[5]^[6]^[7]^[8]	SOT323^[9]^[10]	SOT416^[11]^[12]
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, SMT5),
SOT353 (SC70-5, SC88A, TSSOP-5, UMT5)
	Dimensions (mm)
	SOT23-5^[13]	SOT353^[14]^[15]
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, SMT6, SM6, Mini6, SOT457),
SOT363 (SC70-6, SC88, TSSOP-6, UMT6, US6, S-Mini6)
	Dimensions (mm)
	SOT23-6^[16]^[17]^[18]	SOT363^[19]^[20]
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)^[21]
	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.^[22]

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)^[23]
	Dimensions (mm)
A	4.5
B	2.5
C
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.

SOT223-4 (SC73, TO261AA)^[24]^[25]^[26]
	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^[27]
	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)^[28]
	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

^ "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
^ 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
^ SOT457 package drawing; NXP.com
^ SOT26 dummy component package drawing; TopLine.tv
^ STO?L (MAXIMS) package drawing; maximintegrated.com
^ SOT363 package drawing; NXP.com
^ SOT363 dummy component package drawing; TopLine.tv
^ SOT28 dummy component package drawing; TopLine.tv
^ "TO-92 (SOT54)". Nexperia. 2004-11-16. Retrieved 2017-12-12.
^ SOT89-3 dummy component package drawing; TopLine.tv
^ 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

[1] "Nexperia SOT 23 Package and Dimensions".

[2] "Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017.

[3] "Packaging Information". Intersil. Retrieved 4 May 2017.

[4] "Thin SOT-23 Package Information" (PDF). Vishay Siliconix. Retrieved 4 May 2017.

[5] SOT23-3 package drawing; NXP.com

[6] SOT23-3 dummy component package drawing; TopLine.tv

[7] SOT346 package drawing; NXP.com

[8] SC59A dummy component package drawing; TopLine.tv

[9] SOT323 package drawing; NXP.com

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

[11] SOT416 package drawing; NXP.com

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

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

[14] SOT353 package drawing; NXP.com

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

[16] SOT457 package drawing; NXP.com

[17] SOT26 dummy component package drawing; TopLine.tv

[18] STO?L (MAXIMS) package drawing; maximintegrated.com

[19] SOT363 package drawing; NXP.com

[20] SOT363 dummy component package drawing; TopLine.tv

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

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

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

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

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

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

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

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

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v t e 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) TO-277 (SMPC, SM-7) (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 electronic component 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.