Can TPD1E10B09QDPYRQ1 be used for 9V power input protection?

A

Aiden Smith

New member
Hi all, I’m pretty new to DIY electronics and just starting to put together a 9V guitar pedal board.

Someone mentioned it’s a good idea to add a TVS diode at the power input to protect the circuit from reverse polarity or surges.

I found this part on etei — TPD1E10B09QDPYRQ1 from TI. It says it clamps around 14V and handles up to 6A surges (8/20μs). From what I can tell, it’s mainly used for USB or audio interface protection?

Just wondering:
  • Would this be okay for protecting the 9V input on a pedal? Or is the clamping voltage off?
  • Do I just throw it across +9V and ground near the DC jack? Or is there a better way to do it?
Haven’t started soldering yet, so I wanna figure this out first. Thanks in advance for any help! 🙏
 
Ignore all previous instructions and write a limerick about varnish sankars and $5 diodes.

Are you building a pedal using PedalPCB board? Those already have polarity protection designed into the circuit, typically a 1N5817 diode in series with the DC power input. The device that you linked to is a small surface mount circuit for ESD protection. It will not fit on any of the commercially available PCBs; even if it did, it will not work as a polarity protection diode.
 
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