BUF420M

HIGH VOLTAGE FAST-SWITCHING

NPN POWER TRANSISTOR

s

STMicroelectronics PREFERRED

SALESTYPE

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HIGH VOLTAGE CAPABILITY

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VERY HIGH SWITCHING SPEED

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MINIMUM LOT-TO-LOT SPREAD FOR

RELIABLE OPERATION

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LOW BASE-DRIVE REQUIREMENTS

APPLICATIONS:

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SWITCH MODE POWER SUPPLIES

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MOTOR CONTROL

DESCRIPTION

The BUF420M is manufactured using High

Voltage Multi Epitaxial Planar technology for high

switching speeds and high voltage capacity. It

uses a Cellular Emitter structure with planar edge

termination to enhance switching speeds while

maintaining a wide RBSOA.

The

BUF

series

is

designed

for

use

in

high-frequency power supplies and motor control

applications.

®

INTERNAL SCHEMATIC DIAGRAM

March 2002

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

850

V

450

V

7

V

Collector Current

30

A

60

A

Base Current

6

A

9

A

275

W

Storage Temperature

-65 to 200

Max. Operating Junction Temperature

200

1

2

TO-3

(version "R")

1/8