FST8035 - FST8050
F
A
N 2-PLCS
P
E
L
1
2
3
A=Common Anode
1
2
3
Common Cathode
Dim. Inches
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
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
Schottky MiniMod
M
3 PINS eq sp at .200
G
K
C
J
H
Note: Baseplate Common with Pin 2
1
2
3
D=Doubler
Dia.
Microsemi
Catalog Number
FST8035*
FST8040*
FST8045*
FST8050*
Industry
Part Number
81CNQ035, A
81CNQ040, A
81CNQ045, A
Working
Peak Reverse
Voltage
35V
40V
45V
50V
Repetitive
Peak Reverse
Voltage
35V
40V
45V
50V
Schottky Barrier Rectifier
Guard Ring Protection
2X40 Amperes avg.
175°C Junction Temperature
Reverse Energy Tested
VRRM - 35 to 50 Volts
ROHS Compliant
*Add the Suffix A for Common Anode, D for Doubler
Electrical Characteristics
I F(AV) 80 Amps
Average forward current per pkg
I F(AV) 40 Amps
Average forward current per leg
I FSM 800 Amps
Maximum surge current per leg
Max repetitive peak reverse current per leg I R(OV) 2 Amps
VFM 0.49 Volts
Max peak forward voltage per leg
VFM 0.68 Volts
Max peak forward voltage per leg
I RM 50 mA
Max peak reverse current per leg
I RM 2 mA
Max peak reverse current per leg
CJ 1900 pF
Typical junction capacitance per leg
TC = 145°C, Square wave, R0JC = 0.5°C/W
TC = 145°C, Square wave, R0JC = 1.0°C/W
8.3 ms, half sine, T J = 175°C
f = 1 KHZ, 25°C, 1µsec square wave
I FM = 40A: T J = 175°C*
I FM = 40A: T J = 25°C*
VRRM, T J = 125°C*
VRRM, T J = 25°C
VR = 5.0V, T C = 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 175°C
-55°C to 175°C
Junction to case
1.0°C/W
0.5°C/W
Junction to case
0.3°C/W
Case to sink
10 inch pounds maximum
0.3 ounce (8.4 grams) typical
www.microsemi.com
January, 2010 - Rev. 4
FST8035 - FST8050
Figure 1
Typical Forward Characteristics - Per Leg
1000
800
600
Junction Capacitance - pF
400
Figure 3
Typical Junction Capacitance - Per Leg
10000
6000
4000
2000
1000
600
400
200
100
0.1
200
100
80
60
40
Instantaneous Forward Current - Amperes
0.5
1.0
5.0
10
50
100
Reverse Voltage - Volts
Figure 4
Forward Current Derating - Per Leg
180
170
160
150
140
130
120
110
0
0.5
10
15
60
20
90
25
30
120
35
180
40
45
DC
50
20
150 C
25 C
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
35
30
25
20
15
10
5.0
0
0
5.0
10
15
20
25
30
35
40
45
50
Average Forward Current - Amperes
60
90
120
DC
180
Figure 2
Typical Reverse Characteristics - Per Leg
Typical Reverse Current - mAmperes
1000
175 C
100
10
1.0
0.1
.01
75 C
25 C
0
10
20
30
40
50
125 C
Reverse Voltage - Volts
www.microsemi.com
January, 2010 - Rev. 4
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