TO-247 COMPONENT PACKAGE

TO-247 Component Package

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Date Published:	March 16, 2021
Last Modified:	December 24, 2021

1. Overview

Name

TO-247 (Transistor Outline 247, JEDEC)

Synonyms

SOD-429 (TO-247AC, Nexperia)
CASE 340L-02 (TO-247AC, On Semi)[1]

Similar To

TO-218 (unlike the TO-247, this does not have an isolated mounting hole)

Variants

TO-247AC, TO-247-3 (3 leads)
TO-247PLUS-3 (Infineon)[2]
TO-247PLUS-4 (Infineon)[2]

Mounting

Pin Count

2, 3 (TO-247AC)

Pitch

5.45mm (0.215")[1]

Solderability

Suitable for wave soldering. Easy to solder by hand.

Thermal Resistance

Package LxWxH

n/a

Typical PCB Land Area

n/a

3D Models

n/a

Common Uses

BJTs
MOSFETs

2. TO-247AC (TO-247-3)

The TO-247AC (a.k.a. TO-247-3) is the 3-pin variant of the TO-247 package. It is considered the "upgrade" of the TO-218 (SOT-93), with the main difference being the insulated mounting hole, making it easier to mount to a heatsink without shorting things out (it is "mechanically compatible" with the TO-218, however not identical![1]).

When containing a MOSFET, the pin wiring is usually:

Gate
Drain
Source

Figure 1. Photo of the International Rectifier (now Vishay) IRFP460 N-channel power MOSFET in the TO-247AC component package.

to 247ac component package 3d render infineon

Figure 2. 3D render of the TO-247AC component package. Image from https://www.powerelectronictips.com/igbts-come-fully-isolated-247-package/, retrieved 2021-03-16.

to 247ac sod 429 component package dimensions

Figure 3. The dimensions for the TO-247AC (SOD-429) component package. Image from https://assets.nexperia.com/documents/package-information/SOT429.pdf, accessed 2021-03-16.

3. TO-247PLUS

The TO-247PLUS packages (TO-247PLUS-3 and TO-247PLUS-4) are variants of the TO-247 package by Infineon. The main difference is the removal of the mounting holes in the TO-247PLUS variants, plus some extended creepage distances for the TO-247PLUS[2].

to 247vs to 247 plus component packages infineon

Figure 4. Comparisons of the TO-247-3 and -4 to the TO-247PLUS variants[2].

References

[1] ON Semiconductor (2012, Jun 9). Final Product/Process Change Notification #16827: Package change from TO-218 to TO-247 for all Bipolar Power Transistors. Retrieved 2021-12-24, from https://www.mouser.com/PCN/ON%20Semiconductor_16827.pdf.
[2] Infineon (2017, Feb 10). AN2017-01: TO-247PLUS - Description of the packages and assembly guidelines. Retrieved 2021-12-25, from https://www.infineon.com/dgdl/Infineon-Discrete_IGBT_in_TO-247PLUS-AN-v02_00-EN.pdf?fileId=5546d46249cd10140149e0c7fe9d56c7.