VISHAY
UG8HT, UGF8HT, UG8JT, UGF8JT
Vishay Semiconductors
Ultrafast Rectifiers
TO-220AC
ITO-220AC
Major Ratings and Characteristics
I
F(AV
)
V
RRM
t
rr
t
fr
V
F
8A
500, 600 V
25 ns
500 ns
1.5 V
2
1
1
2
Features
• Glass passivated chip junction
• Soft recovery characteristics
• High efficiency, low switching losses
• Meets MSL level 1, per J-STD-020C
PIN 1
PIN 2
UG8XT
UGF8XT
PIN 1
CASE
PIN 2
Typical Applications
For use in high voltage and high frequency power fac-
tor correction application
Maximum Ratings
(T
C
= 25 °C unless otherwise noted)
Parameter
Maximum repetitive peak
reverse voltage
Maximum working reverse
voltage
Maximum RMS voltage
Maximum average forward
rectified current
Peak forward surge current
Test condition
Pr
od
uc
t
Mechanical Data
Symbol
V
RRM
UG8HT
500
UG8JT
600
V
RWM
V
RMS
V
DC
I
F(AV)
I
FSM
400
350
500
8.0
100
480
420
600
T
J
, T
STG
-55 to +150
4500
(1)
3500
(2)
1500
(3)
V
ISOL
Case:
JEDEC TO-220AC, ITO-220AC
Terminals:
Matte tin plated (E3 Suffix) leads, solder-
able per J-STD-002B and MIL-STD-750, Method
2026
Mounting Torque:
10 in-lbs Maximum
Epoxy meets UL-94V-0 Flammability rating
Unit
V
V
V
V
A
A
Maximum DC blocking voltage
N
ew
8.3 ms single half sine-wave
superimposed on rated load
(JEDEC Method) at T
C
= 100 °C
Operating junction and storage
temperature range
RMS Isolation voltage (UGF
types only) from terminals to
heatsink
with t = 1.0 second, RH
≤
30 %
°C
V
Document Number 88767
02-Nov-04
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UG8HT, UGF8HT, UG8JT, UGF8JT
Vishay Semiconductors
Electrical Characteristics
(T
C
= 25 °C unless otherwise noted)
Parameter
Maximum instantaneous
forward voltage
(4)
Test condition
I
F
= 8 A, T
J
= 25 °C
I
F
= 8 A, T
J
= 125 °C
Symbol
V
F
I
R
UG8HT
1.75
1.50
30
800
4.0
25
50
1.0
5.5
10
500
UG8JT
VISHAY
Unit
V
µA
µA
mA
ns
ns
-
A
A
ns
Maximum DC reverse current at T
J
= 25 °C
V
RWM
T
J
= 100 °C
T
J
= 125 °C
Maximum reverse recovery time at I
F
= 0.5 A, I
R
= 1.0 A,
I
rr
= 0.25 A
at I
F
= 1.0 A, di/dt = 50 A/µs,
V
R
= 30 V, I
rr
= 0.1 I
RM
Typical softness factor (t
b
/t
a
)
Maximum reverse recovery
current
I
F
= 8.0 A, di/dt = 240 A/µs,
V
R
= 400 V, I
rr
= 0.1 I
RM
at I
F
= 8.0 A, di/dt = 64 A/µs,
V
R
= 400 V, T
C
= 125 °C
at I
F
= 8.0 A, di/dt = 240 A/µs,
V
R
= 400 V, T
C
= 125 °C
Peak forward recovery time
at I
F
= 8.0 A, di/dt = 64 A/µs,
V
F
= 1.1 V
F max
t
rr
t
rr
S
I
RM
I
RM
t
fr
Notes:
(1) Clip mounting (on case), where lead does not overlap heatsink with 0.110" offset
(2) Clip mounting (on case), where leads do overlap heatsink
(3) Screw mounting with 4-40 screw, where washer diameter is
≤
4.9 mm (0.19")
(4) Pulse test: 300
µs
pulse width, 1 % duty cycle
Thermal Characteristics
(T
C
= 25 °C unless otherwise noted)
Parameter
Typical thermal resistance from
junction to case
Test condition
Symbol
R
θJC
UG8
2.2
UGF8
5.0
Unit
°C/W
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Document Number 88767
02-Nov-04
VISHAY
UG8HT, UGF8HT, UG8JT, UGF8JT
Vishay Semiconductors
Ratings and Characteristics Curves
(T
A
= 25
°C
unless otherwise noted)
12.0
10,000
Resistive or Inductive Load
10.0
8.0
UG8
6.0
UG8F
4.0
2.0
Average Forward Rectified Current (A)
Instantaneous Reverse Current (µA)
1,000
100
10
0
25
50
75
100
125
150
175
1
0
20
40
60
80
100
Case Temperature ( °C)
Percent of Rated Peak Reverse Voltage (%)
Figure 1. Maximum Forward Current Derating Curve
Figure 4. Typical Reverse Leakage Characteristics
1,000
100
T
J
= T
J
max.
8.3 ms Single Half Sine-Wave
(JEDEC Method)
Peak Forward Surge Current (A)
Junction Capacitance (pF)
100
10
T
J
= 25 °C
f = 1.0 MH
Z
V
sig
= 50 mvp-p
10
1
10
100
1
0.1
1
10
100
Number of Cycles at 60 H
Z
Reverse Voltage (V)
Figure 2. Maximum Non-Repetitive Peak Forward Surge Current
Figure 5. Typical Junction Capacitance
100
Stored Charge/Reverse Recovery Time,
(nC/ns)
Instantaneous Forward Current (A)
350
300
250
200
150
100
50
0
25
50
75
100
125
150
Q
rr
T
rr
I
F
= 8.0 A
V
r
= 30 V
di/dt =
10
T
J
= 25 °C max.
Pulse Width = 300
µs
1 % Duty Cycle
1
0.1
0.01
0.5
1.0
1.5
2.0
2.5
3.0
Instantaneous Forward Voltage (V)
Junction Temperature ( °C)
Figure 3. Typical Instantaneous Forward Characteristics
Figure 6. Reverse Switching Characteristics
Document Number 88767
02-Nov-04
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UG8HT, UGF8HT, UG8JT, UGF8JT
Vishay Semiconductors
Dimensions in Inches and (millimeters)
TO-220AC
0.415 (10.54) MAX.
0.154 (3.91)
0.370 (9.40)
0.360 (9.14)
0.148 (3.74)
0.113 (2.87)
0.103 (2.62)
0.145 (3.68)
0.135 (3.43)
0.410 (10.41)
0.390 (9.91)
PIN
1
0.160 (4.06)
0.140 (3.56)
0.057 (1.45)
0.045(1.14)
2
1.148 (29.16)
1.118 (28.40)
0.110 (2.79)
0.100 (2.54)
0.560 (14.22)
0.530 (13.46)
0.603 (15.32)
0.573 (14.55)
DIA.
0.185 (4.70)
0.175 (4.44)
0.055 (1.39)
0.045 (1.14)
VISHAY
0.635 (16.13)
0.625 (15.87)
0.350 (8.89)
0.330 (8.38)
0.105 (2.67)
0.095 (2.41)
0.035 (0.90)
0.028 (0.70)
0.205 (5.20)
0.195 (4.95)
0.022 (0.56)
0.014 (0.36)
ITO-220AC
0.405 (10.27)
0.383 (9.72)
0.188 (4.77)
0.172 (4.36)
0.110 (2.80)
0.100 (2.54)
0.140 (3.56)
DIA.
0.130 (3.30)
0.131 (3.39)
DIA.
0.122 (3.08)
0.600 (15.5)
0.580 (14.5)
0.676 (17.2)
0.646 (16.4)
0.350 (8.89)
0.330 (8.38)
PIN
1
2
0.191 (4.85)
0.171 (4.35)
0.560 (14.22)
0.530 (13.46)
0.057 (1.45)
0.045(1.14)
0.110 (2.80)
0.100 (2.54)
0.037 (0.94)
0.027 (0.69)
0.205 (5.20)
0.195 (4.95)
0.022 (0.55)
0.014 (0.36)
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Document Number 88767
02-Nov-04
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
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