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PD-2.244 rev. A 12/97
40CDQ... SERIES
SCHOTTKY RECTIFIER 40 Amp
Major Ratings and Characteristics Description/Features
The 40CDQ center tap Schottky rectifier series has been
Characteristics 40CDQ... Units
I
Rectangular 40 A
F(AV)
waveform
V
RRM
I
@ tp = 5 µs sine 2000 A
FSM
VF@ 20 Apk, TJ = 125°C 0.55 V
(per leg)
T
J
35 to 45 V
- 65 to 175 °C
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
Center tap TO-3 package
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Hermetic packaging
operation
J
CASE STYLE AND DIMENSIONS
Conforms to JEDEC Outline TO-204AA (TO-3)
Dimensions in millimeters and inches
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40CDQ... Series
PD-2.244 rev. A 12/97
Voltage Ratings
Part number 40CDQ035 40CDQ040 40CDQ045
VRMax. DC Reverse Voltage (V)
Max. Working Peak Reverse Voltage (V)
V
RWM
35 40 45
Absolute Maximum Ratings
Parameters 40CDQ Units Conditions
I
Max. Average Forward Current 40 A 50% duty cycle @ TC = 135 °C, rectangular wave form
F(AV)
* See Fig. 5
I
Max. Peak One Cycle Non-Repetitive 2000 5µs Sine or 3µs Rect. pulse
FSM
Surge Current (Per Leg) * See Fig. 7 400 10ms Sine or 6ms Rect. pulse
EASNon-Repetitive Avalanche Energy 27 mJ T
(Per Leg)
I
Repetitive Avalanche Current 4 A Current decaying linearly to zero in 1 µsec
AR
(Per Leg) Frequency limited by T
A
= 25 °C, I
J
= 4 Amps, L = 3.4 mH
AS
Following any rated
load condition and with
rated V
max. VA = 1.5 x VR typical
J
RRM
applied
Electrical Specifications
Parameters 40CDQ Units Conditions
VFMMax. Forward Voltage Drop 0.62 V @ 20A
(Per Leg) * See Fig. 1 (1) 0.79 V @ 40A
0.55 V @ 20A
0.71 V @ 40A
IRMMax. Reverse Leakage Current 2 .5 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 25 mA TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 1400 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 10.0 n H Measured mounting plane to lead 5mm from
package body
dv/dt Max. Voltage Rate of Change 10,000 V/ µs
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated V
(1) Pulse Width < 300µs, Duty Cycle <2%
R
Thermal-Mechanical Specifications
Parameters 40CDQ Units Conditions
TJMax. Junction Temperature Range -65 to 175 °C
T
Max. Storage Temperature Range -65 to 175 °C
stg
R
Max. Thermal Resistance Junction 2.20 °C/W DC operation * See Fig. 4
thJC
to Case (Per Leg)
Max. Thermal Resistance Junction 1.10 °C/W DC operation
R
thJC
to Case (Per Package)
R
Typical Thermal Resistance, Case 0.20 °C/W Mounting surface , smooth and greased
thCS
to Heatsink
wt Approximate Weight 11.4(0.40) g (oz.)
T Mounting Torque Min. 12(10)
Max. 17(15)
Case Style TO-204AA (TO-3) JEDEC
Kg-cm
(Ibf-in)
2
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40CDQ... Series
5
0
0
8
PD-2.244 rev. A 12/97
1000
100
F
10
T = 175°C
J
T = 125°C
Instantaneous Forward Cu rrent - I (A)
1
J
T = 25°C
J
1000
T = 175°C
100
J
150°C
125°C
100°C
75°C
50°C
25°C
0 5 10 15 20 25 30 35 40 4
Reverse Voltage - V (V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
T = 25°C
J
Reverse Current - I (m A)
R
10000
T
10
1
.1
.01
.00 1
.0001
1000
R
Junction Ca pacitance - C (pF)
.1
0.2.4.6.811.21.41.61.
Forward Voltage Drop - V (V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
10
1
th J C
.1
.01
Therma l I mp e d a nce - Z ( °C /W )
.001
.00001 .0001 .001 .01 .1 1 10 10
(Per Leg)
D = 0.50
D = 0.33
D = 0.25
D = 0.17
D = 0.08
Sin g le P ulse
(Thermal Resistance)
Fig. 4 - Max. Thermal Impedance Z
FM
t , Rectangular Pulse Du ration (Seconds)
1
thJC
100
0102030405
Re verse V oltage - V (V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
P
DM
t
1
t
2
Notes:
1. Du ty facto r D = t / t
2 . Pe a k T = P x Z + T
JDMthJCC
Characteristics (Per Leg)
1
2
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R
3
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40CDQ... Series
0
0
PD-2.244 rev. A 12/97
180
40CDQ
R ( DC) = 2.20°C/W
170
160
150
140
Allowable Cas e Te m perature - (°C)
130
0 5 10 15 20 25 3
A v e r a g e Fo rwa rd C u r re nt - I ( A )
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
thJC
DC
10000
FSM
1000
F(AV)
Average Power Loss - (W atts)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
16
D = 0.08
D = 0.17
D = 0.25
12
D = 0.33
D = 0.50
RMS Limit
8
4
0
0 5 10 15 20 25 3
Average Forward Current - I (A)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
DC
F(AV)
Non-R epetitiv e Sur ge Current - I (A)
100
10 100 1000 10000
CURRENT
MONITOR
DUT
Squar e Wave P ul se Duration - t (microsec )
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
IRFP460
Rg = 25 ohm
Fig. 8 - Unclamped Inductive Test Circuit
p
HIGH-SPEED
SWITCH
FREE- WH EEL
DIODE
40HFL40S02
Vd = 25 Volt
+
4
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