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Document Number: 93530

4

Revision: 17-Jun-08

8AF Series

Vishay Semiconductors

Pressfit Rectifier Diodes, 50 A

Fig. 4 - Forward Power Loss Characteristics

Fig. 5 - Maximum Non-Repetitive Surge Current

Fig. 6 - Maximum Non-Repetitive Surge Current

Fig. 7 - Forward Voltage Drop Characteristics

025

50

75

100

125

150

15 K/W

10 K/W

5 K/W

3 K/W

1.5

K/W

R

=1

K

/W

- D

elta

R

2 K

/W

Maximum Allowable Ambient Temperature (°C)

0

10

20

30

40

50

60

70

80

90

0

102030

4050

60

7080

DC

180°

120°

90°

60°

30°

Average Forward Current (A)

RMS Limit

Conduction Period

8AF Series

T = 195°C

J

150

200

250

300

350

400

450

500

550

600

650

700

110

100

Initial T = 195°C

@ 60 Hz 0.0083 s

@ 50 Hz 0.0100 s

At Any Rated Load Condition And With

Rated V

Applied Following Surge.

RRM

J

Number Of Equal Amplitude Half Cycle Current Pulses (N)

8AF Series

150

200

250

300

350

400

450

500

550

600

650

700

750

0.01

0.1

1

Pulse Train Duration (s)

8AF Series

Maximum Non Repetitive Surge Current

Initial T = 195 °C

No Voltage Reapplied

Rated V

Reapplied

RRM

Versus Pulse Train Duration.

J

1

10

100

1000

0123

4

5

6

7

8AF Series

T = 195°C

J

T = 25°C

J

Instantaneous Forward Voltage (V)

0.01

0.1

1

0.001

0.01

0.1

1

10

8AF Series

Square Wave Pulse Duration (s)

Steady State Value

(DC Operation)