MJE13009-Q Datasheet, PDF (3/4 Pages) Unisonic Technologies – NPN BIPOLAR POWER TRANSISTOR FOR SWITCHING APPLICATIONS

MJE13009-Q
Preliminary
 TYPICAL THERMAL RESPONSE
NPN SILICON TRANSISTOR
There are two limitations on the power handling ability of a transistor: average junction temperature and second
breakdown. Safe operating area curves indicate I_C-V_CE 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 Fig. 7 is based on T_C = 25°C; T_J(PK) is variable depending on power level. Second breakdown pulse
limits are valid for duty cycles to 10% but must be debated when T_C≥25°C. Second breakdown limitations do not
debate the same as thermal limitations. Allowable current at the voltages shown on Fig. 7 may be found at any case
temperature by using the appropriate curve on Fig. 9.
At high case temperatures, thermal limitations will reduce the power that can be handled to values less than the
limitations imposed by second breakdown.
Use of reverse biased safe operating area data (Fig. 8) is discussed in the applications information section.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 4
QW-R223-026.a