Hey everyone, I have run into a very strange problem, and I am hoping you can enlighten me. I have tried to test the attached circuit. However when I do the BJT conducts even when the base is grounded. The blue values are measured. I am using the BJT as a switch and I know I have already pushed my BJT way past the max power. All other components are high power rated. But as the circuit is, it should not even be conducting, because Vce max is 40V. When I designed this high current circuit, I assumed 6.3V would drop on the diode, collector to emitter saturation voltage would be about a volt, and the rest would drop across the resistor. However it seems that about a volt is being dropped across the resistor and the rest across CE. Is this because my resistance is so small? How can I remedy this? I was thinking of just using a higher power rated BJT but I don't know if that will stop it from conducting when it is not supposed to. I don't really want to change my resistor or diode because I want high current. Thanks for the help.
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