Operating Life Test Rack

Visible are copper bus bars capable of supplying 150 amps total to the (16) plug in board locations

View of rack with boards inserted

Each board holds 40 TO220 / TO247 power transistors

A dip switch selects the bias current that the transistors will be operated

Typical test is to operate transistors for 168 hours at a case temperature of 150° C to determine degradation of devices over time