BU208A
BU508A/BU508AFI
HIGH VOLTAGE FAST-SWITCHING
NPN POWER TRANSISTORS
s
STMicroelectronics PREFERRED
SALESTYPES
s
HIGH VOLTAGE CAPABILITY
s
U.L. RECOGNISED ISOWATT218 PACKAGE
(U.L. FILE # E81734 (N)
s
JEDEC TO-3 METAL CASE.
APPLICATIONS:
s
HORIZONTAL DEFLECTION FOR COLOUR
TV
DESCRIPTION
The
BU208A, BU508A and BU508AFI are
manufactured
using
Multiepitaxial
Mesa
technology for cost-effective high performance
and use a Hollow Emitter structure to enhance
switching speeds.
INTERNAL SCHEMATIC DIAGRAM
November 1999
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
CES
Collector-Emit ter Volt age (V
BE
= 0)
1500
V
V
CEO
Collector-Emit ter Volt age (I
B
= 0)
700
V
V
EBO
Emitt er-Base Voltage (I
C
= 0)
10
V
I
C
Collector Current
8
A
I
CM
Collector Peak Current (t
p
< 5 ms)
15
A
TO - 3
TO - 218
I SOW AT T218
P
t ot
Tot al Dissipation at T
c
= 25
o
C
150
125
50
W
T
stg
St orage Temperature
-65 to 175 -65 to 150
-65 t o 150
o
C
T
j
Max. Operat ing Junction Temperat ure
175
150
150
o
C
1
2
3
TO-218
ISOWATT218
1
2
3
1
2
TO-3
For TO-3 :
C = Tab
E = Pin2.
1/8
THERMAL DATA
T O-3
TO -218
ISO WATT218
R
t hj-ca se
Thermal Resistance Junction-case
Max
1
1
2. 5
o
C/W
ELECTRICAL CHARACTERISTICS (T
case
= 25
o
C unless otherwise specified)
Symb ol
Parameter
Test Cond ition s
Mi n.
Typ .
Max.
Un it
I
CES
Collector Cut -of f
Current (V
BE
= 0)
V
CE
= 1500 V
T
C
= 125
o
C
V
CE
= 1500 V
1
2
mA
mA
I
EBO
Emitt er Cut -of f Current
(I
C
= 0)
V
EB
= 5 V
100
A
V
CEO(sus )
Collector-Emit ter
Sustaining Voltage
(I
B
= 0)
I
C
= 100 mA
700
V
V
EBO
Emitt er Base Voltage
(I
C
= 0)
I
E
= 10 mA
10
V
V
CE(sat )
Collector-Emit ter
Saturation Voltage
I
C
= 4. 5 A
I
B
= 2 A
1
V
V
BE(s at)
Base-Emitt er
Saturation Voltage
I
C
= 4. 5 A
I
B
= 2 A
1.3
V
t
s
t
f
INDUCTIVE LO AD
St orage Time
Fall Time
I
C
= 4. 5 A
h
F E
= 2.5
V
CC
= 140 V
L
C
= 0.9 mH
L
B
= 3
H
7
0. 55
s
s
f
T
Transition Frequency
I
C
= 0. 1 A
V
CE
= 5 V
f = 5 MHz
7
MHz
Pulsed: Pulse duration = 300
s, duty cycle 1.5 %
Safe Operating Area (TO-3)
Safe Operating Areas (TO-218/ISOWATT218)
BU208A / BU508A / BU508AFI
2/8
DC Current Gain
Base Emitter Saturation Voltage
Switching Time Inductive Load (see figure 1)
Collector Emitter Saturation Voltage
Switching Time Inductive Load
BU208A / BU508A / BU508AFI
3/8
Figure 1: Inductive Load Switching Test Circuit.
BU208A / BU508A / BU508AFI
4/8
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
11.00
13.10
0.433
0.516
B
0.97
1.15
0.038
0.045
C
1.50
1.65
0.059
0.065
D
8.32
8.92
0.327
0.351
E
19.00
20.00
0.748
0.787
G
10.70
11.10
0.421
0.437
N
16.50
17.20
0.649
0.677
P
25.00
26.00
0.984
1.023
R
4.00
4.09
0.157
0.161
U
38.50
39.30
1.515
1.547
V
30.00
30.30
1.187
1.193
E
B
R
C
D
A
P
G
N
V
U
O
P003F
TO-3 MECHANICAL DATA
BU208A / BU508A / BU508AFI
5/8
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