SCHOTTKY RECTIFIER
15 Amp
Bulletin PD-20239 rev. B 12/01
1
www.irf.com
Major Ratings and Characteristics
I
F(AV)
Rectangular
15
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
990
A
V
F
@
15 Apk, T
J
= 125C
0.50
V
T
J
range
- 55 to 150
C
Characteristics
12TQ
Units
Description/ Features
The 12TQ... Schottky rectifier series has been optimized for
very low forward voltage drop, with moderate leakage. The
proprietary barrier technology allows for reliable operation up
to 150 C junction temperature. Typical applications are in
switching power supplies, converters, free-wheeling diodes,
and reverse battery protection.
150 C T
J
operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
I
F(AV)
= 15Amp
V
R
= 35 to 45V
12TQ...
12TQ...S
Case Styles
12TQ...
TO-220AC
12TQ... S
D
2
PAK
Anode
1
3
Base
Cathode
2
N/C
Anode
1
3
Cathode
Base
Cathode
2
12TQ... Series
2
Bulletin PD-20239 rev. B 12/01
www.irf.com
V
FM
Max. Forward Voltage Drop (1)
0.56
V
@ 15A
* See Fig. 1
0.71
V
@ 30A
0.50
V
@ 15A
0.64
V
@ 30A
I
RM
Max. Reverse Leakage Current (1)
1.75
mA
T
J
= 25 C
* See Fig. 2
70
mA
T
J
= 125 C
C
T
Max. Junction Capacitance
900
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 C
L
S
Typical Series Inductance
8.0
nH
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
10000
V/ s
(Rated V
R
)
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Electrical Specifications
Parameters
12TQ
Units
Conditions
(1) Pulse Width < 300s, Duty Cycle < 2%
T
J
Max. Junction Temperature Range
-55 to 150
C
T
stg
Max. Storage Temperature Range
-55 to 150
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)
Thermal-Mechanical Specifications
Parameters
12TQ
Units
Conditions
I
F(AV)
Max. Average Forward Current
15
A
50% duty cycle @ T
C
= 120 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
990
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
250
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
16
mJ
T
J
= 25 C, I
AS
= 2 .4 Amps, L = 5.5 mH
I
AR
Repetitive Avalanche Current
2.4
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Parameters
12TQ Units
Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated V
RRM
applied
Kg-cm
(Ibf-in)
Voltage Ratings
Part number
12TQ035
12TQ040
12TQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
35
40
45
12TQ... Series
3
Bulletin PD-20239 rev. B 12/01
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
.001
.01
.1
1
10
100
1000
0
5 10 15 20 25 30 35 40 45
R
R
125C
100C
75C
50C
25C
Reverse Voltage - V (V)
R
ev
e
r
s
e
C
u
r
r
e
n
t
-
I
(
m
A)
T = 150C
J
100
1000
0
10
20
30
40
50
T = 25C
J
Reverse Voltage - V (V)
R
T
J
u
n
c
ti
o
n
C
a
p
a
c
i
ta
n
c
e
-
C
(p
F
)
.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
Im
p
e
d
a
n
c
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
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
FM
F
In
s
t
a
n
ta
n
e
o
u
s
F
o
r
w
a
r
d
C
u
r
r
e
n
t
-
I (
A
)
Forward Voltage Drop - V (V)
T = 150C
T = 125C
T = 25C
J
J
J
12TQ... Series
4
Bulletin PD-20239 rev. B 12/01
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
0
2
4
6
8
10
12
0 2 4 6 8 10 12 14 16 18 20 22
DC
A
v
e
r
a
g
e
P
o
w
e
r L
o
s
s
- (W
a
tts
)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
115
125
135
145
155
0
4
8
12
16
20
24
DC
A
l
l
o
w
abl
e
C
a
s
e
T
e
m
per
at
u
r
e -
(
C
)
Average Forward Current - I (A)
F(AV)
12TQ
R (DC) = 2.0C/W
thJC
100
1000
10
100
1000
10000
FS
M
p
Non-Repetitive Surge Current -
I (A)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
FR EE-W HE EL
D IO D E
40H FL40S02
C UR RE N T
M O N ITO R
H IG H -SPE ED
SW ITC H
IRFP460
L
D UT
Rg = 25 ohm
V d = 25 V olt
+
12TQ... Series
5
Bulletin PD-20239 rev. B 12/01
www.irf.com
Outline Table
Conform to JEDEC outline TO-220AC
Dimensions in millimeters and (inches)
3.78 (0.15)
3.54 (0.14)
10.54 (0.41)
MAX.
DIA.
15.24 (0.60)
14.84 (0.58)
2.92 (0.11)
2.54 (0.10)
1
TERM 2
14.09 (0.55)
13.47 (0.53)
3.96 (0.16)
3.55 (0.14)
0.94 (0.04)
0.69 (0.03)
4.57 (0.18)
4.32 (0.17)
3
0.61 (0.02) MAX.
5.08 (0.20) REF.
1.32 (0.05)
1.22 (0.05)
6.48 (0.25)
6.23 (0.24)
2
0.10 (0.004)
1.40 (0.05)
1.15 (0.04)
2.89 (0.11)
2.64 (0.10)
1
3
2.04 (0.080) MAX.
Conform to JEDEC outline D
2
Pak (SMD-220)
Dimensions in millimeters and (inches)
10.16 (0.40)
REF.
8.89 (0.35)
4.57 (0.18)
4.32 (0.17)
0.61 (0.02) MAX.
5.08 (0.20) REF.
1.32 (0.05)
1.22 (0.05)
1
3
6.47 (0.25)
6.18 (0.24)
93
REF.
2.61 (0.10)
2.32 (0.09)
5.28 (0.21)
4.78 (0.19)
4.69 (0.18)
4.20 (0.16)
0.55 (0.02)
0.46 (0.02)
14.73 (0.58)
15.49 (0.61)
1.40 (0.055)
1.14 (0.045)
3X
0.93 (0.37)
0.69 (0.27)
2X
11.43 (0.45)
17.78 (0.70)
8.89 (0.35)
3.81 (0.15)
2.08 (0.08)
2X
2.54 (0.10)
2X
MINIMUM RECOMMENDED FOOTPRINT
2
Anode
1
3
Cathode
Base
Cathode
2
Anode
1
3
Base
Cathode
2
N/C
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