There are various types of semiconductor and IC packages, such as Small Outline Transistor (SOT) and Small Outline Diode (SOD).
Regarding the "Small Outline Transistor (SOT)", this article will explain the information below.
- Small Outline Transistor (SOT) Definition
- Types of Small Outline Transistor (SOT)
Small Outline Transistor (SOT) Definition
SOT stands for "Small Outline Transistor".
Since Small Outline Transistor (SOT) is a surface mount package developed for transistors, there are many 3-pin SOT. Currently, Small Outline Transistor (SOT) is used not only for transistors but also for other semiconductors (e.g., diodes) and ICs.
SOT package names differ depending on the pin pitch as shown in the figure above.
SOT-23 with a pin pitch of 0.95 mm, SOT-89 with a pin pitch of 1.5 mm, SOT-143 with a pin pitch of 1.9 mm, and SOT-223 with a pin pitch of 2.3 mm are commonly used.
Small Outline Transistor (SOT) is sometimes described with a different package code depending on the number of pins. Also, there are various designations for the same shape depending on the manufacturer.
Types of Small Outline Transistor (SOT)
The following types of SOT are described next.
- SOT-523 with a pin pitch of 0.5 mm
- SOT-323 with a pin pitch of 0.65 mm
- SOT-23 with a pin pitch of 0.95 mm
- SOT-89 with a pin pitch of 1.5 mm
- SOT-143 with a pin pitch of 1.9mm
- SOT-223 with a pin pitch of 2.3 mm
SOT-523
SOT-523 is a surface mount type package with a pin pitch of 0.5mm. SOT-523 is available in 3 to 6 pin versions.
SOT-523 may be denoted with a different package code depending on the number of pins. For example, when the middle of the SOT-523 number ("2") becomes "4", it is 4-pin (SOT-543), and when it becomes "5", it is 5-pin (SOT-553).
There are various names for the same shape. For example, "SOT-523" is called "SSM" by Toshiba.
Package with a pin pitch of 0.5 mm
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-523 SOT-416 | ― | SC-75 SC-75A | Gull wing | 3 | 1.6×1.6×0.7 | 【Toshiba】 ・SSM 【ROHM】 ・EMD3(Diode) ・EMT3(Transistor) |
| SOT-416FL SOT-490 | ― | SC-81 SC-89 | Flat Lead | 3 | 1.6×1.6×0.7 | 【Panasonic】 ・SSMini3-F3-B 【ROHM】 ・EMD3F(Diode) ・EMT3F(Transistor) |
| SOT-543 | ― | SC-107A | Flat Lead | 4 | 1.6×1.6×0.7 | 【ROHM】 ・EMD4(Diode) |
| SOT-553 | ― | SC-107BB | Flat Lead | 5 | 1.6×1.6×0.7 | 【Toshiba】 ・ESV 【ROHM】 ・EMD5(Diode) ・EMT5(Transistor) |
| SOT-563 | ― | SC-107C SC-75-6 | Flat Lead | 6 | 1.6×1.6×0.7 | 【Toshiba】 ・ES6 【ROHM】 ・EMD6(Diode) ・EMT6(Transistor) 【KEC】 ・TES6 【Other Notations】 ・SS-Mini6 |
Supplement
The "SC-75A" has a slightly thicker 3-pin when compared to the "SC-75".
Also available are surface-mount type packages with a package size height of 0.55 mm and a pin pitch of 0.5 mm. These are shown below.
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-665 | ― | ― | Flat Lead | 5 | 1.6×1.6×0.55 | 【Panasonic】 ・SSMini5-F3-B |
| SOT-666 SOT-666-6 | ― | ― | Flat Lead | 6 | 1.6×1.6×0.55 | 【Panasonic】 ・SSMini6-F3-B |
SOT-323
SOT-323 is a surface mount type package with a pin pitch of 0.65mm. SOT-323 is available in 3 to 6 pin versions.
SOT-323 may be denoted with a different package code depending on the number of pins. For example, when the middle of the SOT-323 number ("2") becomes "4", it is 4-pin (SOT-343), and when it becomes "5", it is 5-pin (SOT-353).
Flat leaded products have an "F" at the end. For example, a 4-pin flat leaded product is "SOT-343F".
There are various names for the same shape. For example, "SOT-323" is called "USM" by Toshiba.
Package with a pin pitch of 0.65 mm
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-323 | ― | SC-70 | Gull wing | 3 | 2.0×2.1×0.9 | 【Toshiba】 ・USM 【Panasonic】 ・SMini3-G1-B 【ROHM】 ・UMD3(Diode) ・UMT3(Transistor) 【KEC】 ・USM |
| SOT-323F | ― | SC-85 | Flat Lead | 3 | 2.0×2.1×0.7 | 【Toshiba】 ・UFM 【Panasonic】 ・SMini3-F2-B 【ROHM】 ・UMD3F(Diode) ・UMT3F(Transistor) |
| SOT-343 | ― | SC-82 SC-82A | Gull wing | 4 | 2.0×2.1×0.9 | 【ROHM】 ・UMD4(Diode) |
| SOT-343F | ― | ― | Flat Lead | 4 | 2.0×2.1×0.7 | ― |
| SOT-353 | ― | SC-88A SC-70-5 | Gull wing | 5 | 2.0×2.1×0.9 | 【Toshiba】 ・USV 【ROHM】 ・UMD5(Diode) ・UMT5(Transistor) 【KEC】 ・USV |
| SOT-353F | ― | SC-113CB | Flat Lead | 5 | 2.0×2.1×0.7 | 【Panasonic】 ・SMini5-F3-B |
| SOT-363 | ― | SC-88 SC-70-6 | Gull wing | 6 | 2.0×2.1×0.9 | 【Toshiba】 ・US6 【ROHM】 ・UMD6(Diode) ・UMT6(Transistor) 【KEC】 ・US6 【Other Notations】 ・S-Mini6 |
| SOT-363F | ― | SC-113DB | Flat Lead | 5 | 2.0×2.1×0.7 | 【Toshiba】 ・UF6 【Panasonic】 ・SMini6-F3-B |
In addition, no-lead surface-mount type packages with a pin pitch of 0.65 mm are also available. These are shown below.
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-1118 | ― | ― | No Lead | 6 | 2.0×2.0×0.75 | 【Toshiba】 ・UDFN6 |
| SOT-1220 | ― | ― | No Lead | 6 | 2.0×2.0×0.75 | 【Toshiba】 ・UDFN6B |
SOT-23
SOT-23 is a surface mount type package with a pin pitch of 0.95mm. SOT-23 is available in 3 to 6 pin versions.
SOT-23 may be denoted with a different package code depending on the number of pins. For example, 5-pin package may be referred to as "SOT-23-5" or "SOT-25".
There are various names for the same shape. For example, "SOT-23-3" is called "S-Mini" by Toshiba.
Note that "SOT-23" and "SOT23-3" are 3-pin surface-mount type packages with a pin pitch of 0.95 mm, but the size may be 2.9 x 2.4 x 1.0 or 2.9 x 2.8 x 1.1.
Package with a pin pitch of 0.95 mm
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-23 SOT-23-3 | TO-236AB | ― | Gull wing | 3 | 2.9×2.4×1.0 | 【Panasonic】 ・NMini3-R1-B 【ROHM】 ・SSD3(Diode) ・SST3(Transistor) |
| SOT-23 SOT-23-3 SOT-346 | TO-236 TO-236AA | SC-59 SC-59A | Gull wing | 3 | 2.9×2.8×1.1 | 【Toshiba】 ・S-mini 【Panasonic】 ・Mini3-G3-B 【ROHM】 ・SMD3(Diode) ・SMT3(Transistor) 【Other Notations】 ・MPAK |
| SOT-25 SOT-23-5 SOT-753 | MO-178 MO-178AA | SC-74A | Gull wing | 5 | 2.9×2.8×1.1 | 【Toshiba】 ・SMV 【Panasonic】 ・Mini5-G3-B 【ROHM】 ・SMD5(Diode) ・SMT5(Transistor) |
| SOT-26 SOT-23-6 SOT-457 | MO-178AB | SC-74 SC-59-6 | Gull wing | 6 | 2.9×2.8×1.1 | 【Toshiba】 ・SM6 【Panasonic】 ・Mini6-G4-B 【ROHM】 ・SMD6(Diode) ・SMT6(Transistor) 【KEC】 ・TS6 【Other Notations】 ・SSOT-6 ・TSOP6 |
| SOT-346T | ― | SC-96 | Gull wing | 3 | 2.9×2.8×0.85 | 【ROHM】 ・TSMT3(Transistor) |
| ― | ― | ― | Gull wing | 5 | 2.9×2.8×0.85 | 【ROHM】 ・TSMD5(Diode) |
| ― | ― | SC-95 | Gull wing | 6 | 2.9×2.8×0.85 | 【ROHM】 ・TSMD6(Diode) ・TSMT6(Transistor) |
| SOT-23F | ― | ― | Flat Lead | 3 | 2.9×2.4×0.8 | ― |
SOT-89
SOT-89 is a surface mount type package with a pin pitch of 1.5mm. SOT-89 is available in 3-pin and 5-pin versions (3-pin is more common).
SOT-89 may be denoted with a different package code depending on the number of pins. For example, 5-pin package may be referred to as "SOT-89-5".
There are various names for the same shape. For example, "SOT-89" and "SOT-89-3" are called "MPT3" in ROHM.
Package with a pin pitch of 1.5 mm
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-89 SOT-89-3 | TO-243AA | SC-62 | Flat Lead | 3 | 4.5×4.0×1.5 | 【ROHM】 ・MPT3(Transistor) 【ルネサス】 ・Power Mini Mold 【Other Notations】 ・UPAK |
| SOT-89-5 | ― | ― | Flat Lead | 5 | 4.5×4.0×1.5 | ― |
SOT-143
SOT-143 is a surface mount type package with a pin pitch of 1.9mm. SOT-143 has 4 pins.
Only one pin is wider than the others.
There are various names for the same shape. For example, "SOT-143" is called "Mini4-G4-B" by Panasonic.
Package with a pin pitch of 1.9 mm
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-143 | TO-253 TO-253AA | SC-61A SC-61B | Gull wing | 4 | 2.9×2.8×1.1 | 【Panasonic】 ・Mini4-G4-B |
SOT-223
SOT-223 is a surface mount type package with a pin pitch of 2.3mm. SOT-223 is available in 4 to 8 pin versions.
The 4-pin SOT-223-5 has a pin pitch of 2.3 mm. 5-pin "SOT-223-5" has five legs coming out of one side of the package, resulting in a pin pitch of 1.27 mm. 8-pin "SOT-223-8" has four legs coming out of both sides of the package, resulting in a pin pitch of 1.53 The pin pitch is 1.53mm.
Package with a pin pitch 2.3mm (← 4-pin only)
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-223 SOT-223-4 | TO-261AA | SC-73 | Gull wing | 4 | 6.5×7.0×1.8 | ― |
| SOT-223-5 | ― | ― | Gull wing | 5 | 6.5×7.0×1.8 | ― |
| SOT-223-8 | ― | ― | Gull wing | 8 | 6.5×7.0×1.6 | ― |
The "SOT-428" package, which is a formed SC-64 (TO-251) to allow surface mounting, also has a pin pitch of 2.3 mm. It is shown below.
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|
| SOT-428 | TO-252 TO-252AA | SC-63 | Gull wing | 3 | 6.5×9.5×2.3 | 【ROHM】 ・CPT3(Transistor) 【Other Notations】 ・DPAK |
Other Packages
In addition to the packages described so far, there are others that start with SOT. They are listed below.
| Package Code | JEDEC Code | JEITA Code | Lead Type | Pins | Size (W×L×H) | ピンピッチ | Notation Method for each manufacturer |
|---|---|---|---|---|---|---|---|
| SOT-723 | ― | SC-105AA | Gull wing | 3 | 1.2×1.2×0.5 | 0.4 | 【Toshiba】 ・VESM 【ROHM】 ・VMD3(Diode) ・VMT3(Transistor) |
| SOT-883 | ― | SC-101 | No Lead | 3 | 0.6×1.0×0.38 | 0.35 | 【Toshiba】 ・CST3 【Panasonic】 ・ML3-N4-B |
| SOT-923 | ― | SC-116B | Flat Lead | 3 | 0.6×1.0×0.38 | 0.175 | 【Panasonic】 ・USSMini3-F1-B |
Summary
In this article, the following information on the "Small Outline Transistor (SOT)" was explained.
- Small Outline Transistor (SOT) Definition
- Types of Small Outline Transistor (SOT)
Thank you for reading.
Related article
The packages of semiconductors (IC and transistor) other than "Small Outline Transistor (SOT)" described in this article are explained in detail in the following article. If you are interested, please check it out from the link below.
- Types of IC Packages
- What is Small Outline Diode (SOD)?
- What is Transistor Outline (TO)?
- What is Single In-line Package (SIP)?
- What is Dual In-line Package (DIP)?
- What is Zig-zag In-line Package (ZIP)?
- What is Small Outline Package (SOP)?
- What is Small Outline Non-leaded package (SON)?
- What is Small Outline J-leaded package (SOJ)?
- What is Quad Flat Package (QFP)?
- What is Quad Flat Non-leaded package (QFN)?
- What is Quad Flat J-leaded package (QFJ)?
- What is Ball Grid Array (BGA)?
- What is Land Grid Array (LGA)?
- What is Pin Grid Array (PGA)?