October 2014

DocID026702 Rev 5

1/14

This is information on a product in full production.

www.st.com

STF5N105K5

N-

channel 1050 V, 2.9 Ω typ., 3 A MDmesh™ K5

Power MOSFET in a TO-220FP package

Datasheet - production data

Figure 1: Internal schematic diagram

Features

Order code

STF5N105K5

1050 V

3.5 Ω

3 A

25 W



Worldwide best FOM (figure of merit)



Ultra low gate charge



100% avalanche tested



Zener-protected

Applications



Switching applications

Description

This N-channel Zener-protected Power MOSFET

is

designed using ST’s revolutionary avalanche-

rugged very high voltage MDmesh™ K5

technology, based on an innovative proprietary

vertical structure. The result is a dramatic

reduction in on-resistance, and ultra-low gate

charge for applications which require superior

power density and high efficiency.

Table 1: Device summary

Part number

Marking

Package

Packaging

STF5N105K5

5N105K5

TO-220FP

Tube