ling ling

My heating problem of one-way thyristor with the chip of BT151

Discussion created by ling ling on Apr 12, 2017

Good morning~all

  Thanks for reading my thread. I met some troubles when I am working on the experience of one-way thyristor. Can you help me out?

I took a board to do the experience today. The air pump was controlled by silicon. The working current is low just about 50mA. But its ridiculous that the silicon is in a heavy heating. Just working for a while,silicon began to smoke. The SCR I used is BT151 which from NXP. This is BT151's datasheet and the following picture is my circuit:



Do you know where occurs problems? How to sovle it?

Thanks a lot.