Bulletin PD-20648 rev. C 09/04
20CTQ150
20CTQ150S
20CTQ150-1
SCHOTTKY RECTIFIER
20 Amp
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 10 Apk, T
J
= 125°C
(per leg)
range
Description/ Features
Units
A
V
A
V
This center tap Schottky ectifier 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
Center tap configuration
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
Values
20
150
1030
0.66
- 55 to 175
°C
Case Styles
20CTQ150
20CTQ150S
20CTQ150-1
Base
Common
Cathode
2
Base
Common
Cathode
2
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
1
Anode
Anode
2
Common
Cathode
3
1
Anode
Anode
2
Common
Cathode
3
Anode
TO-220AB
D
2
PAK
TO-262
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20CTQ150, 20CTQ150S, 20CTQ150-1
Bulletin PD-20648 rev. C 09/04
Voltage Ratings
Parameters
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
20CTQ150
20CTQ150S
20CTQ150-1
150
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward
Current
I
FSM
E
AS
I
AR
* See Fig. 5
(Per Leg)
(Per Device)
Values
10
20
1030
180
2.45
0.7
Units
A
Conditions
50% duty cycle @ T
C
= 154°C, rectangular wave form
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
T
J
= 25 °C, I
AS
= 0.7 Amps, L = 10 mH
5µs Sine or 3µs Rect. pulse
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
A
mJ
A
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
Typ.
0.80
0.90
0.63
0.73
Max. Units
0.88
1.0
0.66
0.77
25
5.0
280
8.0
10000
V
V
V
V
µA
mA
pF
nH
V/ µs
Conditions
@ 10A
@ 20A
@ 10A
@ 20A
T
J
= 25 °C
T
J
= 125 °C
@ 25°C
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
Typical Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
3.0
2.7
-
-
-
V
R
= 5V
DC
(test signal range 100kHz to 1Mhz)
Measured lead to lead 5mm from package body
(Rated V
R
)
(1) Pulse Width < 300µs, Duty Cycle < 2%
dv/dt Max. Voltage Rate of Change
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
Values
-55 to 175
-55 to 175
2.0
1.0
0.50
2 (0.07)
Min.
Max.
6 (5)
12 (10)
Units
°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
°C/W Mounting surface , smooth and greased
(only for TO-220)
g (oz.)
Kg-cm
(Ibf-in)
Case style TO-220
Case style D
2
-Pak
Case style TO-262
20CTQ150
20CTQ150S
20CTQ150-1
2
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20CTQ150, 20CTQ150S, 20CTQ150-1
Bulletin PD-20648 rev. C 09/04
100
Reverse Current - I
R
(mA)
100
10
1
0.1
0.01
Tj = 175˚C
150˚C
125˚C
100˚C
75˚C
50˚C
25˚C
Instantaneous Forward Current - I
F
(A)
0.001
0.0001
0
20 40 60 80 100 120 140 160
Reverse Voltage - V
R
(V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
10
1000
T
J
= 175˚C
T
J
= 125˚C
T
J
= 25˚C
Junction Capacitance - C
T
(p F)
Tj = 25˚C
100
1
0.2 0.4 0.6 0.8
10
1
1.2 1.4 1.6 1.8
2
0
40
80
120
160
Forward Voltage Drop - V
FM
(V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
Reverse Voltage - V
R
(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
10
(°C/W)
1
Thermal Impedance Z
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
Notes:
thJC
P
DM
t1
t2
0.1
Single Pulse
(Thermal Resistance)
1. Duty factor D = t1/ t2
2. Peak Tj = Pdm x ZthJC + Tc
0.01
0.00001
0.0001
0.001
0.01
t
1
, Rectangular Pulse Duration (Seconds)
0.1
1
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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3
20CTQ150, 20CTQ150S, 20CTQ150-1
Bulletin PD-20648 rev. C 09/04
180
Allowable Lead Temperature (°C)
Allowable Power Loss (Watts)
10
9
8
7
6
5
4
3
2
1
0
0
170
DC
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
RMS Limit
160
150
Square wave (D = 0.50)
80% Rated Vr applied
140
see note (2)
130
0
2
4
6
8
10 12 14 16
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Maximum Average Forward Current
Vs. Allowable Lead Temperature
Non-Repetitive Surge Current - I
FSM
(A)
3
6
9
12
15
Average Forward Current - I
F(AV)
(A)
Fig. 6 - Maximum Average Forward Dissipation
Vs. Average Forward Current
1000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
100
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Maximum Peak Surge Forward Current Vs. Pulse Duration
L
HIGH-S
PEED
S CH
WIT
FREE-WHEEL
DIODE
40HF
L40S
02
+
DUT
IR
FP460
R = 25 ohm
g
Vd = 25 Volt
CURR
ENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
(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
4
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20CTQ150, 20CTQ150S, 20CTQ150-1
Bulletin PD-20648 rev. C 09/04
Outline Table
10.54 (0.41)
MAX.
3.78 (0.15)
3.54 (0.14)
15.24 (0.60)
14.84 (0.58)
1 2 3
14.09 (0.55)
13.47 (0.53)
3.96 (0.16)
3.55 (0.14)
2.04 (0.080) MAX.
1.40 (0.05)
1.15 (0.04)
0.94 (0.04)
0.69 (0.03)
2.89 (0.11)
2.64 (0.10)
0.10 (0.004)
Base
Common
Cathode
2
1.32 (0.05)
DIA.
6.48 (0.25)
6.23 (0.24)
2°
1.22 (0.05)
2.92 (0.11)
2.54 (0.10)
TERM 2
1 2 3
4.57 (0.18)
4.32 (0.17)
0.61 (0.02) MAX.
1
Anode
2
Common
Cathode
3
Anode
5.08 (0.20) REF.
Conform to JEDEC outline TO-220AB
Dimensions in millimeters and (inches)
Modified JEDEC outline TO-262
Dimensions in millimeters and (inches)
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
Anode
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