April 2007

Rev 1

1/10

10

Order codes

Part number

Marking

Package

Packaging

BUL741

BUL741

TO-220

Tube

BUL741

High voltage fast-switching NPN Power Transistor

General features

■

High voltage capability

■

Low spread of dynamic parameters

■

Minimum lot-to-lot spread for reliable operation

■

Very high switching speed

■

In compliance with the 2002/93/EC European

Directive

Description

The device is manufactured using high voltage

Multi-Epitaxial Planar technology for high

switching speeds and high voltage capability.

Thanks to an increased intermediate layer, it has

an intrinsic ruggedness which enables the

transistor to withstand an high collector current

level during breakdown condition, without using

the transil protection usually necessary in typical

converters for lamp ballast.

Applications

■

Electronic ballast for fluorescent lighting

■

Switch mode power supplies.

Internal schematic diagram

TO-220

1

2

3

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