SCHOTTKY RECTIFIER
8 Amp
8TQ... SERIES
PD-2.238 rev. A 12/97
1
www.irf.com
Dimensions in millimeters and inches
Conforms to JEDEC Outline TO - 220AC
CASE STYLE AND DIMENSIONS
Major Ratings and Characteristics
I
F(AV)
Rectangular
8
A
waveform
V
RRM
range
80 to 100
V
I
FSM
@ tp = 5 s sine
850
A
V
F
@
8 Apk, T
J
= 125C
0.58
V
T
J
range
- 55 to 175
C
Characteristics
8TQ...
Units
Description/Features
The 8TQ Schottky rectifier series has been optimized for low
reverse leakage at high temperature. The proprietary barrier
technology allows for reliable operation up to 175 C junction
temperature. Typical applications are in switching power
supplies, converters, free-wheeling diodes, and reverse bat-
tery protection.
175 C T
J
operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
8TQ... Series
2
PD-2.238 rev. A 12/97
www.irf.com
V
FM
Max. Forward Voltage Drop (1)
0.72
V
@ 8A
* See Fig. 1
0.88
V
@ 16A
0.58
V
@ 8A
0.69
V
@ 16A
I
RM
Max. Reverse Leakage Current (1)
0.55
mA
T
J
= 25 C
* See Fig. 2
7
mA
T
J
= 125 C
C
T
Max. Junction Capacitance
500
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 C
L
S
Typical Series Inductance
8
nH
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
10,000
V/ s
(Rated V
R
)
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Electrical Specifications
Parameters
8TQ
Units
Conditions
(1) Pulse Width < 300s, Duty Cycle < 2%
T
J
Max. Junction Temperature Range
-55 to 175
C
T
stg
Max. Storage Temperature Range
-55 to 175
C
R
thJC
Max. Thermal Resistance Junction
2.0
C/W
DC operation * See Fig. 4
to Case
R
thCS
Typical Thermal Resistance, Case to
0.50
C/W
Mounting surface , smooth and greased
Heatsink
wt
Approximate Weight
2 (0.07)g (oz.)
T
Mounting Torque
Min.
6 (5)
Max.
12 (10)
Case Style
TO-220AC
JEDEC
Kg-cm
(Ibf-in)
Thermal-Mechanical Specifications
Parameters
8TQ
Units
Conditions
Part number
8TQ080
8TQ100
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
I
F(AV)
Max. Average Forward Current
8
A
50% duty cycle @ T
C
= 157 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
850
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
230
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
7.50
mJ
T
J
= 25 C, I
AS
= 0.50 Amps, L = 60 mH
I
AR
Repetitive Avalanche Current
0.50
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Parameters
8TQ
Units
Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated V
RRM
applied
80
100
8TQ... Series
3
PD-2.238 rev. A 12/97
www.irf.com
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.1
1
10
100
1000
0
.2
.4
.6
.8
1
1.2 1.4 1.6 1.8
2 2.2
FM
F
I
n
s
t
ant
a
neo
us
F
o
r
w
ar
d
C
u
r
r
e
nt
-
I
(
A
)
T = 175C
T = 125C
T = 25C
J
J
J
Forward Voltage Drop - V (V)
.001
.01
.1
1
10
.00001
.0001
.001
.01
.1
1
10
100
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
1
th
J
C
t , Rectangular Pulse Duration (Seconds)
Th
e
r
m
a
l
I
m
pe
da
nc
e
-
Z
(
C
/W
)
Single Pulse
(Thermal Resistance)
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
J
DM
thJC
C
2
100
1000
0 10 20 30 40 50 60 70 80 90100110
T = 25C
J
Reverse Voltage - V (V)
R
T
J
u
n
c
t
i
o
n
C
a
pa
c
i
t
a
nc
e -
C
(
p
F
)
.0001
.001
.01
.1
1
10
100
0
20
40
60
80
100
R
R
T = 175C
150C
125C
100C
75C
50C
25C
J
Reverse Voltage - V (V)
R
e
v
e
r
s
e
C
u
r
r
e
n
t
-
I
(
m
A
)
8TQ... Series
4
PD-2.238 rev. A 12/97
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
160
165
170
175
180
0
2
4
6
8
10
12
DC
A
l
l
o
wa
b
l
e
Ca
s
e
T
e
m
p
e
r
a
t
u
re
- (
C
)
Average Forward Current - I (A)
F(AV)
8TQ
R (DC) = 2.0C/W
thJC
0
1
2
3
4
5
6
7
0
2
4
6
8
10
12
DC
A
v
er
ag
e P
o
w
e
r
Lo
s
s
-
(
W
at
t
s
)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
100
1000
10
100
1000
10000
FS
M
p
N
on-
R
epet
i
t
i
v
e S
u
r
ge C
u
r
r
ent
-
I
(
A
)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
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