Obsolete part

[GoldbergLab]

Thank you for providing all the detailed information for constructing this! I noticed that parts D3 and D4 (Digikey part number 488-SZESDM3551N2T5GCT-ND), are obsolete and no longer sold.

Would you recommend a replacement? My best guess was this one: https://www.digikey.com/en/products/detail/nexperia-usa-inc/PESD5V5C1BLYL/19109478, but I'm not sure if I picked appropriate electrical characteristic compromises, as there wasn't an exact replacement that I could find.

Thank you!

[MacDaveB]

I'm having the same trouble with sourcing an alternative to D3 and D4. Trying to build the Sniff Detector board. Any updates here?

[Poofjunior]

Thanks for chiming in folks, and apologies for my delay. (Catching up on tons of other projects on my end.)

For D3, D4, it looks like this part should work: MPN: PESD5V0F1BLD,315 (digikey link). It's not listed under the same package name, but it's the same size.