Bulletin PD-20834 rev. A 02/07
43CTQ...GS
43CTQ...G-1
SCHOTTKY RECTIFIER
40 Amp
I
F(AV)
= 40 Amp
V
R
= 80 - 100V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5
μs
sine
V
F
T
J
@ 20 Apk, T
J
= 125°C
(per leg)
range
Description/ Features
Units
A
V
A
V
This 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 re-
verse battery 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
40
80 - 100
850
0.67
- 55 to 175
°C
Case Styles
43CTQ...GS
43CTQ...G-1
Base
Common
Cathode
2
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
Anode
1
Anode
2
Common
Cathode
3
Anode
D
2
PAK
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TO-262
1
43CTQ...GS, 43CTQ...G-1
Bulletin PD-20834 rev. A 02/07
Voltage Ratings
Parameters
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
43CTQ080GS
43CTQ080G-1
43CTQ100GS
43CTQ100G-1
80
100
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
20
40
850
275
7.50
0.50
Units
A
Conditions
50% duty cycle @ T
C
= 135°C, rectangular wave form
5μs Sine or 3μs Rect. pulse
10msSineor6msRect.pulse
Following any rated
load condition and with
rated V
RRM
applied
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-RepetitiveAvalancheEnergy
(Per Leg)
RepetitiveAvalancheCurrent
(Per Leg)
A
mJ
A
T
J
= 25 °C, I
AS
= 0.50 Amps, L = 60 mH
Current decaying linearly to zero in 1
μsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
Values
0.81
0.98
0.67
0.81
0.36
13
0.71
0.43
1480
8.0
10000
Units
V
V
V
V
mA
mA
V
mΩ
Conditions
@ 20A
@ 40A
@ 20A
@ 40A
T
J
= 25 °C
T
J
= 125 °C
T
J
= T
J
max.
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
V
F(TO)
Threshold Voltage
r
t
C
T
L
S
Forward Slope Resistance
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
pF
nH
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
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
Device Marking
°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 D
2
-Pak
Case style TO-262
43CTQ...GS
43CTQ...G-1
2
www.irf.com
43CTQ...GS, 43CTQ...G-1
Bulletin PD-20834 rev. A 02/07
1000
1000
100
10
1
0.1
0.01
0.001
0
20
40
60
80
100
Reverse Current - I
R
(mA)
T
J
= 175°C
150°C
125°C
100°C
75°C
50°C
25°C
Insta ntaneous Forward Current - I
F
(A)
100
T
J
= 175°C
T
J
= 125°C
T
J
= 25°C
10
Junction Capac itance - C
T
(pF
)
10000
Reverse Voltage - V
R
(V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
T
J
= 25°C
1000
1
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
100
0
20
40
60
80
100
Reverse Voltage - V
R
(V)
Forward Voltage Drop - V
FM
(V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
10
T
hermal Impedanc e Z
thJC
(°C/ W)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
1
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
P
DM
0.1
Notes:
S
ingle Pulse
(T
hermal R
esistance)
0.01
0.00001
0.0001
0.001
0.01
0.1
t1
t2
1. Duty fac tor D = t 1/ t 2
2. Peak T = P x Z
thJC
+ T
C
J
DM
1
10
100
t 1, R
ecta ng ular Pulse Duration (S
econd s
)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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3
43CTQ...GS, 43CTQ...G-1
Bulletin PD-20834 rev. A 02/07
180
Allowable Case T
emperature - (°C)
20
Average Power Loss - (Watts)
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMSLimit
10
DC
170
160
150
140
130
120
110
see note (2)
DC
15
S uare wave (D = 0.50)
q
80% R
ated V
R
applied
5
100
0
5
10
15
20
25
30
0
0
5
10
15
20
25
30
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Non-Repetitive S
urge Current - I
FSM
(A)
1000
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
At Any R
ated Load Condition
And With R
ated V
RRM
Applied
Following S
urge
100
10
100
1000
10000
S
quare Wave Pulse Duration - t p (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-S
PEED
S CH
WIT
FREE-WHEEL
DIODE
40HF
L40S
02
+
DUT
IR P460
F
R = 25 ohm
g
Vd = 25 Volt
CURRENT
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
= 10 V
4
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43CTQ...GS, 43CTQ...G-1
Bulletin PD-20834 rev. A 02/07
Outline Table
Base
Common
Cathode
2
1
Anode
2
Common
Cathode
3
Anode
Conform to JEDEC outline D
2
Pak (SMD-220)
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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5
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