BUV21

http://onsemi.com

3

Figure 2. Active Region Safe Operating Area

40

1

10

200

10

1

0.1

100

There are two limitations on the power handling ability of

a transistor: average junction temperature and second

limits of the transistor that must be observed for reliable

operation i.e., the transistor must not be subjected to greater

dissipation than the curves indicate.

variable depending on power level. Second breakdown

limitations do not derate the same as thermal limitations.

At high case temperatures, thermal limitations will reduce

the power that can be handled to values less than the

limitations imposed by second breakdown.

Figure 3. “On” Voltages

Figure 4. DC Current Gain

50

100

110

40

0

30

20

10

Figure 5. Resistive Switching Performance

3.0

0

5

10

15

25

2.0

1.0

0.4

0.3

0.2

20

2.0

110

1.6

0.8

1.2

0.4

Figure 6. Switching Times Test Circuit

10,000

mF

0