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What is safe operating area (SOA)?

There are two modes of safe operating area (SOA).

  1. Forward Bias SOA (F.B. SOA): Usable area of current and voltage at ON status.
  2. Reverse Bias SOA (R.B. SOA): Usable area of current and voltage at turn-off operation.

F.B.SOA consists of three restriction areas (rated current, rated voltage and thermal resistance areas) and secondary breakdown area.
The three restriction areas are limited by ratings of device or calculated from thermal resistance. But secondary breakdown area is obtained by measurement of actual device.

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.