TIP31
A TIP31 is a standard type of NPN bipolar junction transistor used for medium power applications. A TIP31 is complementary to a TIP32 PNP bipolar transistor. TIP31 transistors are designated as TIP31A, TIP31B, TIP31 to indicate increasing collector-base and collector-emitter breakdown voltage ratings. The TIP31 is packaged in a TO-220 case. TIP stands for Texas Instruments (Plastic) Power transistor. 31 is an arbitrary identifier. The series was listed in a December 1968 data sheet from Texas Instruments
Ratings
These ratings are for the Fairchild TIP31 series. Other manufacturers may have other ratings for this part. These are absolute maximum ratings and should not be exceeded.
These characteristics apply to all types of TIP31 transistors (A, B, C). The characteristics are very similar between models, however differences may apply depending on temperature and/or manufacturing process.
Data Sheet
The data sheet for the TIP31 transistor can be found here or in the reference section.
Podcasts:
TP-2
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Roll around on the front
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Taking off your Secrets with my teeth
Slightly rough to let you know it's about to get kinky
Three
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Four
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Stop
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And the movie's going off
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Five
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Seven
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Eight
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Nine
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Eleven
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Twelve
Now quick before we get to thirteen