How to Build a Protection Circuit for a Darington 2SB1558

Transistors employ semiconductors to amplify the strength of electrical signals. They are used to boost the signal power of everything from audio to power itself. But like any other electrical device, transistors have a limit to the amount of power they can receive. If a transistor receives more voltage than it can handle, the power will likely fry the transistor. The Darlington 2SB1558 transistor is rated for 140 volts. Avoid frying your 2SB1558. Build a protection circuit with a 140-volt fuse to protect your transistor from voltages that are too high.

Things You'll Need

• 140-volt fuse
• Stranded wire

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Instructions

1. • 1

     Feed your 2SB1558's "C" wire through one of the two rings on your 140-volt fuse and wire it to the ring.

   • 2

     Wire the fuse's opposite ring to the positive terminal on your power source.

   • 3

     Wire your 2SB1558's "E" wire to the negative terminal on your power source or to a ground to complete your circuit.