Electronics Forum: fr-4 tg-140 (2)

Minimum Tg for LeadFree board.

Electronics Forum | Thu Aug 20 10:54:25 EDT 2009 | newpic

What is the minimum Tg for FR4 board to consider as Lead Free board? My issue is, I do not know what is the web for the V-Score for a FR4 Tg 180. I use to use a FR4 Tg 140 and there is no problem with it, but since we convert to Lead Free and the

How many thermal cycles for rigid PCB before possible latent field failures

Electronics Forum | Fri Jul 12 07:15:45 EDT 2024 | murtaza

Use high tg material on pcbs. Like tg170 or higher. Its a bit more expensive. Board shops usually quote cheapest material just to win the order. When you see fr4 on the quote it usually means tg135-tg140.

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