SCHOTTKY RECTIFIER
12 Amp
12CTQ...
12CTQ...S
12CTQ... -1
www.irf.com
1
Bulletin PD-20554 rev. B 07/01
Major Ratings and Characteristics
I
F(AV)
Rectangular
12
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
690
A
V
F
@
6 Apk, T
J
= 125C
0.53
V
(per leg)
T
J
range
- 55 to 175
C
Characteristics
12CTQ
Units
Description/ Features
The 12CTQ center tap 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 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
12CTQ...
12CTQ... S
12CTQ... -1
TO-220
D
2
PAK
I
F(AV)
= 12Amp
V
R
= 35 to 45V
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
TO-262
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
12CTQ... Series
2
Bulletin PD-20554 rev. B 07/01
www.irf.com
V
FM
Max. Forward Voltage Drop
0.60
V
@ 6A
(Per Leg) * See Fig. 1
(1)
0.73
V
@ 12A
0.53
V
@ 6A
0.64
V
@ 12A
I
RM
Max. Reverse Leakage Current
0.8
mA
T
J
= 25 C
(Per Leg) * See Fig. 2
(1)
7.0
mA
T
J
= 125 C
V
F(TO)
Threshold Voltage
0.35
V
T
J
= T
J
max.
r
t
Forward Slope Resistance
18.23
m
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
Max. Junction Temperature Range
-55 to 175
C
T
stg
Max. Storage Temperature Range
-55 to 175
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)
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
12CTQ Units
Conditions
I
F(AV)
Max. Average Forward
(Per Leg)
6
A
50% duty cycle @ T
C
= 160C, rectangular wave form
Current * See Fig. 5
(Per Device)
12
I
FSM
Max. Peak One Cycle Non-Repetitive
690
5s Sine or 3s Rect. pulse
Surge Current (Per Leg) * See Fig. 7
140
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
8
mJ
T
J
= 25 C, I
AS
= 1.20 Amps, L = 11.10 mH
(Per Leg)
I
AR
Repetitive Avalanche Current
1.20
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
12CTQ035
12CTQ040
12CTQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
35
40
45
Parameters
12CTQ Units
Conditions
Parameters
12CTQ Units
Conditions
12CTQ... Series
3
Bulletin PD-20554 rev. B 07/01
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 .00 0 1
0.0 01
0 .01
0.1
1
1 0
10 0
0
5
1 0
1 5
20
2 5
30
3 5
40
45
R
R
T = 175 C
150 C
125 C
100 C
75 C
50 C
25 C
J
Rev
e
r
s
e
C
u
r
r
e
n
t
-
I
(
m
A
)
Re ve rse V olta g e - V (V )
1 00
10 0 0
0
1 0
2 0
30
4 0
50
T = 25 C
J
R
T
J
u
n
c
t
i
o
n
Ca
p
a
ci
t
a
n
c
e
-
C (
p
F
)
Re verse V olta g e - V (V )
0.0 01
0.0 1
0.1
1
10
0.0 00 0 1
0.0 00 1
0 .0 0 1
0.0 1
0 .1
1
1 0
1 0 0
th
J
C
t , R ectangula r Pulse Dura tio n (Sec o nds)
Sin gle P ulse
(Therm a l Resistanc e)
1
T
h
e
r
m
a
l
I
m
p
e
d
a
n
c
e
Z
(
C
/
W
)
1
2
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
J
D M
thJ C
C
2
t
1
t
P
D M
1
2
Note s:
1. D uty fac tor D = t / t
2. Pe ak T = P x Z + T
Forward Voltage Drop - V
FM
(V)
Instantaneous Forward Current - I
F
(A)
1
10
100
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Tj = 175C
Tj = 125C
Tj = 25C
12CTQ... Series
4
Bulletin PD-20554 rev. B 07/01
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)
(2) Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
0
0 .5
1
1 .5
2
2 .5
3
3 .5
4
4 .5
5
0
2
4
6
8
10
D C
Av
e
r
a
g
e
P
o
w
e
r
L
o
s
s
-
(
W
a
t
t
s
)
F(A V)
RM S Lim it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
A ve ra g e Forw ard C urren t - I (A)
15 0
15 5
16 0
16 5
17 0
17 5
0
2
4
6
8
10
D C
Al
l
o
w
a
b
l
e
C
a
s
e
T
e
m
p
er
a
t
u
r
e
-
(
C
)
F(A V)
see n ote (2)
Sq ua re wa ve (D = 0.50)
80% Ra te d V a p p lied
R
A ve ra g e Forw ard C urre n t - I (A )
1 00
10 0 0
10
1 0 0
1 00 0
10 0 00
FS
M
p
N
o
n
-
R
e
p
e
t
i
t
i
v
e
S
u
rg
e
C
u
rr
e
n
t
-
I
(
A
)
Sq uare W ave Pulse D uration - t (m ic rose c )
At An y Rate d Load C ond ition
An d W ith Rate d V A pp lie d
Follow in g Surg e
RRM
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
+
12CTQ... Series
5
Bulletin PD-20554 rev. B 07/01
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
Conform to JEDEC outline TO-220AB
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
Conform to JEDEC outline D
2
Pak (SMD-220)
Dimensions in millimeters and (inches)
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
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