Bulletin PD-21025 rev. A 06/06
15CTQ...SPbF
15CTQ... -1PbF
SCHOTTKY RECTIFIER
15 Amp
I
F(AV)
= 15Amp
V
R
= 35/ 45V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5
μs
sine
V
F
T
J
@ 7.5 Apk, T
J
= 125°C
(per leg)
range
Description/ Features
Units
A
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 150°C 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
Lead-Free ("PbF" suffix)
Values
15
35 / 45
810
0.51
V
A
V
- 55 to 150
°C
Case Styles
15CTQ...SPbF
15CTQ...-1PbF
Base
Common
Cathode
2
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
1
Anode
Anode
2
Common
Cathode
3
Anode
D
2
PAK
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TO-262
1
15CTQ...SPbF, 15CTQ...-1PbF Series
Bulletin PD-21025 rev. A 06/06
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
15CTQ035SPbF
15CTQ035-1PbF
15CTQ040SPbF
15CTQ040-1PbF
15CTQ045SPbF
15CTQ045-1PbF
35
40
45
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
810
145
10
1.5
A
mJ
A
5μs Sine or 3μs Rect. pulse
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
15CTQ Units
15
A
Conditions
50% duty cycle @ T
C
= 123°C, rectangular wave form
T
J
= 25 °C, I
AS
= 1.20 Amps, L = 11.10 mH
Current decaying linearly to zero in 1
μsec
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
15CTQ Units
0.55
0.70
0.51
0.65
0.8
32
400
8.0
10000
V
V
V
V
mA
mA
pF
nH
@ 7.5A
@ 15A
@ 7.5A
@ 15A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
T
J
= 25 °C
T
J
= 125 °C
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
(1) Pulse Width < 300μs, Duty Cycle <2%
dv/dt Max. Voltage Rate of Change
V/
μs
(Rated V
R
)
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
15CTQ Units
-55 to 150
-55 to 150
3.50
1.75
0.50
2 (0.07)
Min.
Max.
6 (5)
12 (10)
°C
°C
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
to Heatsink
wt
T
Approximate Weight
Mounting Torque
Marking Device
°C/W DC operation
°C/W DC operation
* See Fig. 4
°C/W Mounting surface , smooth and greased
g (oz.)
Kg-cm
(Ibf-in)
Case style D
2
Pak
Case style TO-262
15CTQ...S
15CTQ...-1
2
www.irf.com
15CTQ...SPbF, 15CTQ...-1PbF Series
Bulletin PD-21025 rev. A 06/06
100
100
T = 150°C
J
125°C
100°C
75°C
R
(mA)
10
Reverse Current - I
1
0.1
50°C
25°C
Instantaneous Forward Current - I F (A)
10
0.01
0.001
0
5
10
15
20
25
30
35
40
45
T = 150°C
J
T = 125°C
J
T = 25°C
J
1
Reverse Voltage - V R (V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
1000
(pF)
Junction Capacitance - C
T = 25°C
J
T
0.1
100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Forward Voltage Drop - V FM(V)
0
10
20
30
40
50
Reverse Voltage - V R (V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
10
Thermal Impedance - Z thJC (°C/W)
D = 0.50
D = 0.33
D = 0.25
D = 0.17
D = 0.08
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
1
P
DM
0.1
t1
t2
Notes:
1. Duty fac tor D = t 1 t 2
/
2. Peak T = P
J
0.01
0.1
1
DM
0.01
Single Pulse
(Thermal Resistance)
0.001
0.00001
0.0001
0.001
x Z
thJC
+ T
C
10
100
t , Rectangular Pulse Duration (Seconds)
1
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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3
15CTQ...SPbF, 15CTQ...-1PbF Series
Bulletin PD-21025 rev. A 06/06
155
150
145
140
135
130
125
DC
15CTQ
R thJC (DC) = 3.50°C/W
7
6
Average Power Loss - (Watts)
5
4
3
2
1
0
RMS Limit
DC
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
Allowable Case Temperature - (°C)
0
2
4
6
8
10
12
0
2
4
6
8
10
F(AV)
(A)
12
Average Forward Current - I F(AV) (A)
Average Forward Current - I
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
1000
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
FSM
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
Non-Repetitive Surge Current - I
(A)
100
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-S
PEED
S CH
WIT
FR
EE-WHEEL
DIODE
40HF
L40S
02
+
DUT
IR P460
F
Rg = 25 ohm
Vd = 25 Volt
CURR
ENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
4
www.irf.com
15CTQ...SPbF, 15CTQ...-1PbF Series
Bulletin PD-21025 rev. A 06/06
Outlines Table
Conform to JEDEC outline D
2
Pak (SMD-220)
Dimensions in millimeters and (inches)
Modified JEDEC outline TO-262
Dimensions in millimeters and (inches)
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5
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