MJF47 datasheet(4/6 Pages) ONSEMI

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MJF47

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100 ms

1ms

VCE, COLLECTOR−EMITTER VOLTAGE (VOLTS)

300

100

Figure 7. Maximum Forward Bias Safe

Operating Area

0.5

0.3

0.2

0.1

0.05

0.03

200

500 ms

CURRENT LIMIT

THERMAL LIMIT @ TC = 25°C

SECONDARY BREAKDOWN LIMIT

There are two limitations on the power handling ability of

a transistor: average junction temperature and second

breakdown. Safe operating area curves indicate IC − VCE

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.

The data of Figure 7 is based on TJ(pk) = 150_C; TC is

variable depending on conditions. Second breakdown pulse

limits are valid for duty cycles to 10% provided TJ(pk)

v 150°C. TJ(pk) may be calculated from the data in

Figure 6. At high case temperatures, thermal limitations will

reduce the power that can be handled to values less than the

limitations imposed by second breakdown.

TC, CASE TEMPERATURE (°C)

200

100

150

Figure 8. Power Derating

TA, AMBIENT TEMPERATURE (°C)

200

1.5

0.5

100

150

Figure 9. Power Derating

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