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BUL49D
BULB49D

High voltage fast-switching NPN power transistors

Features
High voltage capability
Low spread of dynamic parameters
Minimum lot-to-lot spread for reliable operation 3
2
3
2 1
1
Very high switching speed TO-220FP
TO-220
High ruggedness

Applications
3
Electronic transformers for halogen lamps 1 3
12
Flyback and forward single transistor low D2PAK I2PAK
power converters

Description Figure 1. Internal schematic diagram
The devices are manufactured using high voltage
multi-epitaxial planar technology for high
switching speeds and high voltage capability. The
devices are designed for use in electronic
transformer for halogen lamps.

Table 1. Device summary
Order code Marking Package Packaging

BUL49D BUL49D TO-220 Tube
BUL49DFP BUL49DFP TO-220FP Tube

BULB49D-1 BULB49D I2PAK Tube

BULB49DT4 BULB49D D2PAK Tape and reel

June 2008 Rev 3 1/15
www.st.com 15
Contents BUL49D - BULB49D

Contents

1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Packaging information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2/15
BUL49D - BULB49D Electrical ratings

1 Electrical ratings

Table 2. Absolute maximum ratings
Value

Symbol Parameter D2PAK Unit
I2PAK TO-220FP
TO-220

VCES Collector-emitter voltage (VBE =0) 850 V
VCEO Collector-emitter voltage (IB =0) 450 V
Emitter-base voltage (IC =0, IB <2 A,
VEBO V(BR)EBO V
tP < 10 ms)
IC Collector current 5 A
ICM Collector peak current (tP < 5ms) 10 A
IB Base current 2 A
IBM Base peak current (tP < 5 ms) 4 A
Ptot Total dissipation at Tc 25