SCHOTTKY RECTIFIER
15 Amp
15CTQ...
15CTQ...S
15CTQ... -1
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1
Bulletin PD-20240 09/00
Major Ratings and Characteristics
I
F(AV)
Rectangular
15
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
810
A
V
F
@
7.5 Apk, T
J
= 125C
0.51
V
(per leg)
T
J
range
- 55 to 150
C
Characteristics
15CTQ
Units
Description/Features
The 15CTQ center tap 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 150C junction temperature. Typical applica-
tions are in switching power supplies, converters, free-wheel-
ing diodes, and reverse battery protection.
175 C T
J
operation
Center tap TO-220 package
Low forward voltage drop
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Case Styles
15CTQ...
15CTQ...S
15CTQ... -1
TO-220
D
2
PAK
TO-262
I
F(AV)
= 15Amp
V
R
= 35 to 45V
15CTQ... Series
2
Bulletin PD-20240 09/00
www.irf.com
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
3.50
C/W DC operation
* See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
1.75
C/W DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
0.50
C/W Mounting surface , smooth and greased
to Heatsink
wt
Approximate Weight
2 (0.07)
g (oz.)
T
Mounting Torque
Min.
6 (5)
Max.
12 (10)
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
V
FM
Max. Forward Voltage Drop
0.55
V
@ 7.5A
(Per Leg) * See Fig. 1
(1)
0.70
V
@ 15A
0.51
V
@ 7.5A
0.65
V
@ 15A
I
RM
Max. Reverse Leakage Current
0.8
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
32
mA
T
J
= 125 C
C
T
Max. Junction Capacitance (Per Leg)
400
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance (Per Leg)
8.0
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
Electrical Specifications
(1) Pulse Width < 300s, Duty Cycle <2%
V
R
= rated V
R
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters
15CTQ Units
Conditions
I
F(AV)
Max. Average Forward Current
15
A
50% duty cycle @ T
C
= 123C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
810
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
145
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
10
mJ
T
J
= 25 C, I
AS
= 1.20 Amps, L = 11.10 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
1.5
A
Current decaying linearly to zero in 1 sec
(Per Leg)
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
A
Part number
15CTQ035
15CTQ040
15CTQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
35
40
45
Parameters
15CTQ Units
Conditions
Parameters
15CTQ Units
Conditions
15CTQ... Series
3
Bulletin PD-20240 09/00
www.irf.com
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
0.1
1
10
100
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
FM
F
Instantaneous For
w
ar
d Current - I (
A
)
T = 150C
T = 125C
T = 25C
J
J
J
Forward Voltage Drop - V (V)
0.001
0.01
0.1
1
10
100
0
5
10 15 20
25 30 35 40 45
R
R
125C
100C
75C
50C
25C
Re
v
e
r
s
e
Cu
r
r
e
n
t
-
I
(
m
A
)
T = 150C
J
Reverse Voltage - V (V)
0.001
0.01
0.1
1
10
0.00001
0.0001
0.001
0.01
0.1
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)
T
herma
l
Im
pe
d
ance - Z (
C
/
W
)
Single Pulse
(Thermal Resistance)
2
t
1
t
P
D M
N ote s:
1. D uty fa c tor D = t / t
2. Pe ak T = P x Z + T
1
J
D M
thJC
C
2
100
1000
0
10
20
30
40
50
T = 25C
J
R
T
Reverse Voltage - V (V)
Junction Capacitance - C (pF)
15CTQ... Series
4
Bulletin PD-20240 09/00
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
FRE E-W H EEL
D IO D E
40H FL40 S02
C UR RE N T
M O N ITO R
H IG H-SPE ED
SW ITC H
IRFP460
L
D UT
R g = 25 oh m
V d = 25 V olt
+
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)
125
130
135
140
145
150
155
0
2
4
6
8
10
12
DC
A
l
l
o
w
able C
a
s
e
T
e
mper
atur
e
-
(
C
)
F(AV)
15CTQ
R (DC) = 3.50C/W
thJC
Average Forward Current - I (A)
0
1
2
3
4
5
6
7
0
2
4
6
8
10
12
DC
Average Power Loss - (Watts)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
15CTQ... Series
5
Bulletin PD-20240 09/00
www.irf.com
Outline Table
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.
2
2
Dimensions in millimeters and (inches)
Conform to JEDEC outline TO-220AB
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2
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
Dimensions in millimeters and (inches)
Conform to JEDEC outline D
2
Pak (SMD-220)
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2
15CTQ... Series
6
Bulletin PD-20240 09/00
www.irf.com
Ordering Information Table
Device Code
1
5
2
4
3
1
-
Essential Part Number
2
-
Common Cathode
3
-
T = TO-220
4
-
Q = Schottky Q Series
5
-
Voltage Rating
6
-
S = D
2
Pak
6
-
-1 = TO-262
15
C
T
Q
045
-1
6
Outline Table
Dimensions in millimeters and (inches)
Modified JEDEC outline TO-262
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2
035 = 35V
040 = 40V
045 = 45V
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