VS-81CNQ...A PbF Series
Vishay High Power Products
Schottky Rectifier
New Generation 3 D-61 Package, 2 x 40 A
VS-81CNQ...APbF
Base
common
cathode
FEATURES
• 175 °C T
J
operation
• Center tap module
• Low forward voltage drop
1
Anode
1
2
Common
cathode
3
Anode
2
• High frequency operation
• High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
• Guard ring for enhanced ruggedness and long term
reliability
D-61-8
VS-81CNQ...ASMPbF
1
Anode
1
2
Common
cathode
3
Anode
2
• New fully transfer-mold low profile, small footprint, high
current package
• Through-hole versions are currently available for use in
lead (Pb)-free applications (“PbF” suffix)
• Compliant to RoHS directive 2002/95/EC
D-61-8-SM
VS-81CNQ...ASLPbF
Base
common
cathode
• Designed and qualified for industrial level
DESCRIPTION
1
D-61-8-SL
Anode
1
3
Anode
2
PRODUCT SUMMARY
I
F(AV)
V
R
2 x 40 A
35 V to 45 V
The center tap Schottky rectifier module 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, freewheeling diodes, and
reverse battery protection.
MAJOR RATINGS AND CHARACTERISTICS
SYMBOL
I
F(AV)
V
RRM
I
FSM
V
F
T
J
CHARACTERISTICS
Rectangular waveform
Range
t
p
= 5 μs sine
40 Apk, T
J
= 125 °C (per leg)
Range
VALUES
80
35 to 45
4600
0.54
- 55 to 175
UNITS
A
V
A
V
°C
VOLTAGE RATINGS
PARAMETER
Maximum DC reverse voltage
Maximum working peak reverse voltage
SYMBOL
V
R
V
RWM
VS-81CNQ035APbF
35
VS-81CNQ040APbF
40
VS-81CNQ045APbF
45
UNITS
V
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 94595
Revision: 16-Apr-10
For technical questions, contact:
diodestech@vishay.com
www.vishay.com
1
VS-81CNQ...A PbF Series
Vishay High Power Products
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Maximum average forward current
See fig. 5
Maximum peak one cycle
non-repetitive surge current per leg
See fig. 7
Non-repetitive avalanche energy per leg
Repetitive avalanche current per leg
SYMBOL
I
F(AV)
TEST CONDITIONS
50 % duty cycle at T
C
= 141 °C, rectangular waveform
5 μs sine or 3 μs rect. pulse
I
FSM
10 ms sine or 6 ms rect. pulse
E
AS
I
AR
Following any rated
load condition and with
rated V
RRM
applied
VALUES
80
4600
790
54
8
mJ
A
A
UNITS
Schottky Rectifier
New Generation 3 D-61 Package, 2 x 40 A
T
J
= 25 °C, I
AS
= 8 A, L = 1.7 mH
Current decaying linearly to zero in 1 μs
Frequency limited by T
J
maximum V
A
= 1.5 x V
R
typical
ELECTRICAL SPECIFICATIONS
PARAMETER
Maximum forward
voltage drop per leg
See fig. 1
Maximum reverse
leakage current per leg
See fig. 2
Maximum junction capacitance per leg
Typical series inductance per leg
Maximum voltage rate of change
Note
(1)
Pulse width < 300 μs, duty cycle < 2 %
SYMBOL
40 A
V
FM (1)
80 A
40 A
80 A
I
RM (1)
C
T
L
S
dV/dt
T
J
= 25 °C
T
J
= 125 °C
V
R
= Rated V
R
TEST CONDITIONS
T
J
= 25 °C
T
J
= 125 °C
VALUES
0.60
0.74
0.54
0.66
5
45
2600
5.5
10 000
mA
pF
nH
V/μs
V
UNITS
V
R
= 5 V
DC
(test signal range 100 kHz to 1 MHz) 25 °C
Measured lead to lead 5 mm from package body
Rated V
R
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER
Maximum junction and storage
temperature range
Maximum thermal resistance,
junction to case per leg
Maximum thermal resistance,
junction to case per package
Typical thermal resistance,
case to heatsink
Approximate weight
Mounting torque
minimum
maximum
Case style D-61
SYMBOL
T
J
, T
Stg
DC operation
See fig. 4
DC operation
R
thCS
Mounting surface, smooth and greased
Device flatness < 5 mils
TEST CONDITIONS
VALUES
- 55 to 175
0.85
0.42
0.30
7.8
0.28
40 (35)
58 (50)
g
oz.
kgf · cm
(lbf · in)
°C/W
UNITS
°C
R
thJC
81CNQ035A
81CNQ040A
81CNQ045A
81CNQ035ASM
Marking device
Case style D-61-8-SM
81CNQ040ASM
81CNQ045ASM
81CNQ035ASL
Case style D-61-8-SL
81CNQ040ASL
81CNQ045ASL
www.vishay.com
2
For technical questions, contact:
diodestech@vishay.com
Document Number: 94595
Revision: 16-Apr-10
VS-81CNQ...A PbF Series
Schottky Rectifier
Vishay High Power Products
New Generation 3 D-61 Package, 2 x 40 A
1000
1000
100
Reverse Current - I
R
(mA)
Tj = 175°C
150°C
10
1
0.1
0.01
0.001
0
5
125°C
100°C
75°C
50°C
25°C
100
Instantaneous Forward Current - I
F
(A)
10 15 20 25 30 35 40 45
Reverse Voltage - V
R
(V)
10
T = 175°C
J
T = 125°C
J
T = 25°C
J
Junction Capacitance - C
T
(p F)
Fig. 2 - Typical Values of Reverse Current vs.
Reverse Voltage (Per Leg)
10000
1
T J = 25°C
1000
0.1
0
0.2
0.4
0.6
0.8
1
100
0
10
20
30
40
50
Reverse Voltage - V
R
(V)
Forward Voltage Drop - V
FM
(V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
(Per Leg)
Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage
(Per Leg)
1
Thermal Impedance Z
thJC
(°C/W)
D = 0.50
D = 0.33
D = 0.25
D = 0.17
0.1
D = 0.08
P
DM
t1
t2
Notes:
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
0.1
1
10
100
t
1
, Rectangular Pulse Duration (Seconds)
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics (Per Leg)
Document Number: 94595
Revision: 16-Apr-10
For technical questions, contact:
diodestech@vishay.com
www.vishay.com
3
VS-81CNQ...A PbF Series
Vishay High Power Products
Schottky Rectifier
New Generation 3 D-61 Package, 2 x 40 A
32
RthJC (DC) = 0.85 °C/W
Average Power Loss (Watts)
180
Allowable Case Temperature (°C)
170
D = 0.08
28
D = 0.17
D = 0.25
24
D = 0.33
D = 0.50
20
160
DC
16
RMS Limit
12
8
4
DC
150
140
0
10
20
30
40
50
60
Average Forward Current - I
F(AV)
(A)
0
0
10
20
30
40
50
60
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics (Per Leg)
10000
Non-Repetitive Surge Current - I
FSM
(A)
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 Non-Repetitive Surge Current (Per Leg)
L
High-speed
switch
Freewheel
diode
40HFL40S02
+ V
d
= 25 V
D.U.T.
IRFP460
R
g
= 25
Ω
Current
monitor
Fig. 8 - Unclamped Inductive Test Circuit
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For technical questions, contact:
diodestech@vishay.com
Document Number: 94595
Revision: 16-Apr-10
VS-81CNQ...A PbF Series
Schottky Rectifier
Vishay High Power Products
New Generation 3 D-61 Package, 2 x 40 A
ORDERING INFORMATION TABLE
Device code
VS-
1
81
2
C
3
N
4
Q
5
045
6
A
7
PbF
8
1
-
-
-
-
-
-
-
HPP product suffix
Current rating (80 A)
Circuit configuration:
C = Common cathode
Package:
N = D-61
Schottky “Q” series
Voltage ratings
Package style:
A = D-61-8
ASM = D-61-8-SM
ASL = D-61-8-SL
2
3
4
5
6
7
035 = 35 V
040 = 40 V
045 = 45 V
8
-
None = Standard production
PbF = Lead (Pb)-free
Standard pack quantity: A = 10 pieces; ASM/ASL = 20 pieces
LINKS TO RELATED DOCUMENTS
Dimensions
Part marking information
www.vishay.com/doc?95354
www.vishay.com/doc?95356
Document Number: 94595
Revision: 16-Apr-10
For technical questions, contact:
diodestech@vishay.com
www.vishay.com
5
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