80 Amp Schottky OR'ing Rectifier
FST8515
3
1
2
Common Cathode
L
1
2
3
A=Common Anode
A
C
E
F
G
H
J
K
L
M
N
P
1.180
.027
.350
1.490
.695
.088
.240
.115
.460
.065
.151
.015
F
A
N 2-PLCS
P
E
Dim. Inches
1.195
.037
.370
1.510
.715
.098
.260
.135
.480
.085
.161
.025
Millimeter
29.97
0.69
8.89
37.85
17.65
2.24
6.10
2.92
11.68
1.65
3.84
0.38
30.35
0.94
9.40
38.35
18.16
2.49
6.60
3.43
12.19
2.16
4.09
0.64
Minimum Maximum Minimum Maximum Notes
1
2
3
M
3 PINS eq sp at .200
G
K
C
J
H
Note: Baseplate Common with Pin 2
1
2
3
D=Doubler
Dia.
Schottky Barrier Rectifier
Microsemi
Catalog Number
FST8515*
Industry
Part Number
85CNQ015, A
Working Peak
Reverse Voltage
15V
Repetitive Peak
Reverse Voltage
15V
0.28V Vf@40A per leg, 100°C
Optimized for OR'ing applications
Guard ring reverse protection
125°C Operation (Vr<5V)
ROHS Compliant
*Add the Suffix A for Common Anode, D for Doubler
Electrical Characteristics
Average forward current per pkg
Average forward current per pkg
Average forward current per leg
Average forward current per leg
Maximum surge current per leg
Max repetitive peak reverse current
Max peak forward voltage per leg
Max peak forward voltage per leg
Max peak reverse current per leg
Max peak reverse current per leg
Max peak reverse current per leg
Max peak reverse current per leg
Typical junction capacitance per leg
I F(AV) 80 Amps
I F(AV) 80 Amps
I F(AV) 40 Amps
I F(AV) 40 Amps
I FSM 800 Amps
I R(OV) 2 Amps
VFM 0.35 Volts
VFM 0.28 Volts
I RM 750 mA
I RM 1500 mA
I RM 12 mA
I RM 20 mA
CJ 5600 pF
TC
TC
TC
TC
= 84°C, VR = 5V
= 78°C, VR = 15V
= 84°C, VR = 5V
= 78°C, VR = 15V
8.3 ms, half sine, T J = 100°C
f = 1 KHZ, 25°C, 1µsec square wave
I FM = 40A: T J = 25°C*
I FM = 40A: T J = 100°C *
VR = 5V, T J = 100°C*
VRRM, T J = 100°C*
VR = 5V, T J = 25°C
VRRM, T J = 25°C
VR = 5.0V, T J = 25°C
*Pulse test: Pulse width 300µsec, Duty cycle 2%
Thermal and Mechanical Characteristics
Storage temp range
Operating junction temp range
Max thermal resistance per leg
Max thermal resistance per pkg
Typical thermal resistance (greased)
Mounting Base Torque
Weight
T STG
TJ
R 0JC
R 0JC
R 0CS
-55°C to 150°C
-55°C to 125°C
1.0°C/W
Junction to case
0.5°C/W
Junction to case
Case to sink
0.3°C/W
10 inch pounds maximum
0.3 ounce (8.4 grams) typical
www.microsemi.com
January, 2010 - Rev. 3
FST8515
Figure 1
Typical Forward Characteristics - Per Leg
1000
800
600
Junction Capacitance - pF
400
Figure 3
Typical Junction Capacitance - Per Leg
100000
60000
40000
20000
10000
6000
4000
2000
1000
0.1
200
100
80
60
40
Instantaneous Forward Current - Amperes
100 C
25 C
0.5
1.0
5.0
10
50
100
Reverse Voltage - Volts
Figure 4
Forward Current Derating - Per Leg
120
110
100
90
80
70
60
50
0
12
90
24
120
36
180
48
DC
60
20
10
8.0
6.0
4.0
2.0
1.0
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Instantaneous Forward Voltage - Volts
Maximum Allowable Case Temperature - C
Maximum Power Dissipation - Watts
Average Forward Current - Amperes
Figure 5
Maximum Forward Power Dissipation - Per Leg
21
18
15
12
9
6
3
0
0
12
24
36
48
60
Average Forward Current - Amperes
90 120
180
DC
Figure 2
Typical Reverse Characteristics - Per Leg
Typical Reverse Current - mAmperes
10000
1000
100 C
100
75 C
10
1.0
0
25 C
3
6
9
12
15
Reverse Voltage - Volts
www.microsemi.com
January, 2010 - Rev. 3
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