BU208A
BU508A/BU508AFI
HIGH VOLTAG E FAST-SWITCHING
NPN POWER TRANSISTORS
■STMicr o electronics PREF E RRED
SALESTYPES
■HIGH VOLT A G E CAPA BILIT Y (> 1500 V )
■FULLY INS ULAT E D PACKA G E (U.L.
COMPLIANT) FOR EASY MOUNTING
APPLICATIONS:
■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.
INT E R NAL SCH E M ATI C DIAG RA M
April 2002
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCES Collector-Emitter Voltage (VBE = 0) 1500 V
VCEO Collector-Emitter Voltage (IB = 0) 700 V
VEBO Emitter-Base Voltage (IC = 0) 10 V
ICCollector Current 8 A
ICM Collector Pe ak Cu rrent (tp < 5 ms) 15 A
BU208A BU508A BU508AFI
TO - 3 TO - 218 ISOWATT218
Ptot Total Dissipation at Tc = 25 oC 150 125 50 W
Visol Insulation Withsta nd Vo ltage (RMS) from All
Three L eads to Exernal Heatsink 2500 V
Tstg Storage Temp erature -65 to 175 -65 to 150 -65 to 150 oC
TjMax. Operating Junctio n Te mperature 175 150 150 oC
123
TO -218 ISOW AT T 21 8
123
12
TO-3
For TO-3 :
C = Tab
E = Pin2.
®
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THERMAL DATA
TO-3 TO-218 ISOWATT218
Rthj-case Thermal Resistance Junction-case Max 1 1 2.5 oC/W
ELE CT RICAL CHAR ACT ERISTICS (Tcase = 25 oC unless otherwise specified)
Symbol Pa ra meter Test Conditions Min. Typ. Max. Unit
ICES Collector Cut-off
Current (VBE = 0) VCE = 15 00 V
VCE = 15 00 V TC = 125 oC1
2mA
mA
IEBO Emitter Cut-off Cu rrent
(IC = 0) VEB = 5 V 100 µA
VCEO(sus)∗Collector-Emitter
Sustaining Voltage
(IB = 0)
IC = 100 mA 700 V
VEBO Emitter Base Volta ge
(IC = 0) IE = 10 mA 10 V
VCE(sat)∗Collector-Emitter
Saturation Voltage IC = 4.5 A IB = 2 A 1 V
VBE(sat)∗Base-Emitter
Saturation Voltage IC = 4.5 A IB = 2 A 1.3 V
ts
tf
INDUCTIVE LOAD
Storage Time
Fall Time
IC = 4.5 A hFE = 2.5 VCC = 140 V
LC = 0.9 mH LB = 3 µH7
550 µs
ns
fTTransition Frequency IC = 0.1 A VCE = 5 V f = 5 MHz 7 MHz
∗ P ulsed: P ulse durati on = 300 µs, duty cycle 1.5 %
Safe O perat ing Area (TO-3) S afe O perating Ar eas (TO-218/I SO WA TT218)
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D erating Curves (TO- 3)
DC Current Gain
Base Em it ter Sat urat ion Voltage
Derating Curves (TO-218/ ISOWATT218)
Collector Em it ter Sat urat io n Voltage
Switching Time Inductive Load
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Figure 1: Induct ive Load Switc hi ng Test Circuit.
Switching Time Inductive Load
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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
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DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.7 4.9 0.185 0.193
C 1.17 1.37 0.046 0.054
D2.5 0.098
E 0.5 0.78 0.019 0.030
F 1.1 1.3 0.043 0.051
G 10.8 11.1 0.425 0.437
H 14.7 15.2 0.578 0.598
L2 – 16.2 – 0.637
L3 18 0.708
L5 3.95 4.15 0.155 0.163
L6 31 1.220
R – 12.2 – 0.480
Ø 4 4.1 0.157 0.161
R
A
C
D
E
H
FG
L6
¯
L3
L2
L5
12 3
TO-218 (SOT-93) MECHANICAL DATA
P025A
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DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 5.35 5.65 0.211 0.222
C 3.30 3.80 0.130 0.150
D 2.90 3.10 0.114 0.122
D1 1.88 2.08 0.074 0.082
E 0.75 0.95 0.030 0.037
F 1.05 1.25 0.041 0.049
F2 1.50 1.70 0.059 0.067
F3 1.90 2.10 0.075 0.083
G 10.80 11.20 0.425 0.441
H 15.80 16.20 0.622 0.638
L 9 0.354
L1 20.80 21.20 0.819 0.835
L2 19.10 19.90 0.752 0.783
L3 22.80 23.60 0.898 0.929
L4 40.50 42.50 1.594 1.673
L5 4.85 5.25 0.191 0.207
L6 20.25 20.75 0.797 0.817
N 2.1 2.3 0.083 0.091
R 4.6 0.181
DIA 3.5 3.7 0.138 0.146
P025C/A
ISOWATT218 MECHANICAL DATA
- Weight : 4.9 g (typ.)
- Maximum Torque (applied to mounting flange ) Recommended: 0. 8 Nm; Maximum: 1 Nm
- The side of the dissipator must be flat within 80 µm
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Information furnished is b elieved to be accurate and reliable. However, STMicroelectronics assumes no responsibility f or t he consequ ences
of use of such inform ation nor for any infringe ment o f patents or other rig hts o f th ird pa rties w hich m ay resu lt from its use . No li cen s e i s
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subject t o change without notice. This publication supersedes and r eplaces al l information previously suppl ied. STMicroelectronics pr oducts
ar e not aut horized for use as critical compo nents in life support devices or systems without express written approval of STMicroel ectronics.
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