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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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The safe operating area (SOA) is defined as the current and voltage conditions over which a bipolar transistor can be expected to operate without suffering damage or degradation. The bipolar transistor must not be exposed to conditions outside the safe operating area even for an instant. Separate SOA curves are plotted for DC and different pulse width conditions. In the case of continuous-pulse operation, it is necessary to ensure that the bipolar transistor will not exceed not only the SOA for single-pulse operation but also the rated junction temperature. For an example of junction temperature calculation, see Bipolar Transistor Application Note: Thermal Stability and Thermal Design.
The borders of the SOA are straight lines bound by: 1) collector current limitation, 2) thermal breakdown limitation, 3) secondary breakdown limitation, and 4) collector-emitter voltage limitation.