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PRESSFIT RECTIFIER DIODES
Features and Descriptions
Convenient pressfit package
Available with and without leads
High surge capabilities
Application
Welders, Battery charges, Alternators
Bulletin I20262 Rev.A 06/03
8AF SERIES
50 A
Major Ratings and Characteristics
Parameters 8AF Units
I
F(AV)
@ T
C
I
F(RMS)
I
@ 50Hz 714 A
FSM
@ 60Hz 747 A
I2t @ 50Hz 2546 A2s
@ 60Hz 2324 A2s
2
I
√t 25455 A2√s
V
range 100 to 800 V
RRM
T
J
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50 A
150 °C
79 A
- 65 to 195
o
C
IR Case Style B-47
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8AF Series
Bulletin I20262 Rev.A 06/03
ELECTRICAL SPECIFICATIONS
Voltage Ratings
Voltage V
Type number Code peak reverse voltage repetitive peak rev. voltage @ T
1 100 150 5
8AF
2 200 300 5
4 400 500 5
8 800 900 5
Forward Conduction
Parameter 8A F Units Conditions
I
Maximum average forward current 50 A 180° conduction, half sine wave
F(AV)
@ Case temperature 150 °C
Maximum RMS forward current 79 A
I
F(RMS)
Maximum peak, one-cycle forward, 714 A t = 10ms No voltage
I
FSM
non-repetitive surge current 747 t = 8.3ms reapplied
2
I
t Maximum I2t for fusing 2546 A2s t = 10ms No voltage Initial TJ = TJ max.
2
√t Maximum I2√t for fusing 25455 A2√s t = 0.1 to 10ms, no voltage reapplied
I
Low level value of threshold voltage 0.60 V (16.7% x π x I
V
F(TO)1
V
High level value of threshold voltage 0.68 (π x I
F(TO)2
r
Low level value of forward slope resistance 6.66 mΩ (16.7% x π x I
f1
High level value of forward slope resistance 6.25 (π x I
r
f2
Maximum forward voltage drop 1.45 V TJ = 25°C, I
V
FM
, maximum repetitive V
RRM
VVmA
600 t = 10ms 100% V
628 t = 8.3ms reapplied Sinusoidal half wave,
2324 t = 8.3ms reapplied
1800 t = 10ms 100% V
1643 t = 8.3ms reapplied
, maximum non- I
RSM
RRM
RRM
< I < π x I
F(AV)
< I < 20 x π x I
F(AV)
< I < π x I
F(AV)
< I < 20 x π x I
F(AV)
= π x rated I
FM
F(AV)
), TJ = TJ max.
F(AV)
F(AV)
), TJ = TJ max.
F(AV)
F(AV)
), TJ = TJ max.
), TJ = TJ max.
RRM
= 150°C
J
max.
Thermal and Mechanical Specifications
Parameter 8AF Units Conditions
TJMax. junction operating temperature range - 65 to 195 °C
T
Storage temperature range - 65 to 195
stg
Max. thermal resistance, junction to case 0.60 K/W DC operation
R
thJC
R
Typical thermal resistance, case to heatsink 0.50 As per mounting details
thCS
wt Approximate weight 10 (0.36) g (oz)
Case style B-47 See outline table
MOUNTING: A 12.6 ± 0.02mm (0.496 to 0.497 inch) diameter hole should be drilled in heatsink, the leading edge chamfered to 0.038mm (0.015
inch) x 45°. The diode should then be press fitted, ensuring that the sides of the diode are kept parallel to the sides of the hole.
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Bulletin I20262 Rev.A 06/03
2
)
∆R
Conduction
thJC
(The following table shows the increment of thermal resistance R
when devices operate at different conduction angles than DC)
thJC
Conduction angle Sinusoidal conduction Rectangular conduction Units Conditions
180° 0.042 0.026 TJ = TJ max.
120° 0.045 0.043
90° 0.06 0.06 K/W
60° 0.10 0.10
30° 0.15 0.15
Ordering Information Table
Device Code
8AF 8 N LV
3
1 2
1 - Essential part number
2 - Voltage code: Code x 100 = V
(See Voltage Ratings Table)
RRM
3 - N = Normal Polarity (cathode to case)
R = Reverse Polarity (anode to case)
4 - PP = Without Lead
LH = Horizontal Lead
LV = Vertical Lead
Available as special product - Contact Factory
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8AF Series
Outline Table
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15.8 (0.62)
2.5 (0.89)
0.5 (0.02)
12.5 (0.49)
7 (0.28)
16.5 (0.65)
DIA. 12.77 / 13.27
(0.50) / (0.52)
2.4 (0.09)
6 (0.24)
All dimensions in millimeters (inches)
0.9 (0.03)
R 0.4 (0.02)
5 (0.20
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8AF Series
5
)
0
)
)
)
)
)
Bulletin I20262 Rev.A 06/03
200
190
8AF Series
R (D C ) = 0 .6 K /W
thJC
180
Conduction Angle
170
160
150
60°
Maximum Allowable Case Temperature (°C
140
0 5 10 15 20 25 30 35 40 45 50 5
30°
Avera ge F orward Curr ent (A )
90°
120°
180°
200
190
8AF Series
R (D C) = 0.6 K /W
thJC
180
170
160
150
Maximum Allowable Case Temperature (°C
140
0 102030405060708
30°
60°
90°
Average F orw ard Current (A)
Fig. 1 - Current Ratings Characteristics Fig. 2 - Current Ratings Characteristics
80
180°
120°
70
60
50
90°
60°
30°
RMS Limit
2
3
R
t
h
S
1
K
/
W
K
/
W
A
.
5
=
K
/
1
W
K
/
W
-
D
e
l
t
a
R
40
5
K
/
30
Conduction Angle
20
10
Maximum Average Forward Power Loss (W
0
0102030405060
8AF Series
T = 195°C
J
Average Forward Current (A)
W
1
0
K
/
W
1
5
K
/
W
0255075100125150
Maximum A llowable Ambient Temperature (°C
Fig. 3 - Forward Power Loss Characteristics
Conduction Period
120°
180°
DC
90
DC
80
180°
120°
70
90°
60
60°
30°
50
RMS Limit
40
30
Conduction Period
20
10
Maximum Average Forward Power Loss (W
0
0 1020304050607080
Average Forward Current (A)
8AF Series
T = 195°C
J
R
t
h
S
A
=
1
.
2
K
3
K
5
K
1
0
K
1
5
K
1
5
/
/
W
/
W
/
/
W
K
W
W
K
/
/
W
W
-
D
e
l
t
a
R
0 25 50 75 100 125 150
Maxim um A llow able A m bient T e m peratu re (°C
Fig. 4 - Forward Power Loss Characteristics
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8AF Series
0
0
)
1
t
d
d
.
Bulletin I20262 Rev.A 06/03
700
At Any Rated Load Condition And With
650
Rated V A pp lied Follow ing S urg e.
600
550
RRM
Initial T = 19 5° C
J
@ 60 Hz 0 .0083 s
@ 50 Hz 0 .0100 s
500
450
400
350
300
250
8AF S eries
200
Peak H a lf Sine Wave F orward Curre nt ( A )
150
11010
Number Of Equal Amplitude Half Cycle Current Pulses (N
750
Maximum Non Repetitive Surge Curren
700
650
600
550
500
450
400
350
300
250
8AF Series
200
Peak Ha lf S ine Wave For w ar d C urr en t (A)
150
0.01 0.1
Versus Pulse Train Duration
Initial T = 1 95 °C
No Voltage Reapplie
Rate d V Reapplie
RRM
Pulse Tr ain Duration (s)
Fig. 5 - Maximum Non-Repetitive Surge Current Fig. 6 - Maximum Non-Repetitive Surge Current
1000
8AF Series
1
Steady State Value
(DC O pe ration)
thJC
100
0.1
10
T = 25°C
J
Instantaneous Forward Current (A)
1
01234567
Instantan eous Fo rw a rd Vo ltage (V)
T = 195°C
J
Tran s ien t T h ermal Im p ed an ce Z ( K /W)
0.01
0.001 0.01 0.1 1 1
Squar e Wave Pulse D ur ation (s )
Fig. 7 - Forward Voltage Drop Characteristics Fig. 8 - Thermal Impedance Z
8AF Series
thJC
J
Characteristic
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