Mcp23008 goes very hot

Hi, I have a 4-Channel General Purpose SPDT Relay Shield + 4 GPIO with IoT Interface

but when I connected to my 12v car, the mcp23008 goes very hot with the engine start, what can I do??


I am not sure I understand. Do you mean the MCP23008 IC itself gets hot but only while starting the car? Does it remain hot while the car is running?

Can you post a photo of how the board is wired in the car?

the MCP remain hot while the car is running.

I have no photo now, but I’m using the relays to control Acc, Ignition, A/C, and the supply for this board come from the battery’s car directly.