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Document Number 84656

20-Jul-05

VSIB620 thru VSIB680

Vishay General Semiconductor

Thermal Characteristics

Ratings at 25 °C ambient temperature unless otherwise specified.

Notes:

(1) Unit case mounted on Al plate heatsink

(2) Units mounted on P.C.B. with 0.5 x 0.5" (12 x 12 mm) copper pads and 0.375" (9.5 mm) lead length

(3) Recommended mounting position is to bolt down on heatsink with silicone thermal compound for maximum heat transfer with #6 screw

Ratings and Characteristics Curves

Parameter

Symbol

VSIB620

VSIB640

VSIB660

VSIB680

Unit

Typical thermal resistance per leg

°C/W

Figure 1. Derating Curve Output Rectified Current

Figure 2. Maximum Non-Repetitive Peak Forward Surge Current

Per Leg

0

50

100

150

0

2.0

4.0

6.0

8.0

Heatsink Mounting, TC

P.C.B. Mounting, TA

Temperature ( °C)

10.0

1

10

100

0

60

30

120

90

180

150

210

Number of Cycles at 60 Hz

1.0 Cycle

TJ =TJ max.

single sine-wave

Figure 3. Typical Forward Characteristics Per Leg

Figure 4. Typical Reverse Characteristics Per Leg

Instantaneous Forward Voltage (V)

0.3

1.1

0.01

10

0.1

1

100

0.5

0.7

0.9

Tj = 125 °C

Tj = 150 °C

Tj=25 °C

Percent of Rated Peak Reverse Voltage (%)

TJ= 125C

1000.0

20

60

40

100

80

0.0

0.1

1.0

10.0

100.0

Tj = 150 °C

Tj = 125 °C

Tj=25 °C