The packaging is radically different... the second one seems like it can handle a lot more current but both are rated at 40A and have other similar specs...
Anyone know any real different between the two besides the packaging? (I want to replace one for the other)
BTW, the reason is that the first costs 7$ and the second costs 20$(and 35$ from the local store which always seems to inflate prices about 100x)
From the book, the NTE part may have an issue with reapplied dv/dt, if the NTE part is to be the retrofit. Check snubber values. NTE also does not specify Rthjc, so that's one unknown.
If this is a repair of safety-listed hardware, use of a different package shape or wiring harness terminations on a line-isolating assembly is not strictly kosher.
RL
maybe not but it's a lot cheaper... it's for a battery charger so I don't think there is any real issues here except specs.
similar
35$Use the Alternistor. It's cheaper and doesn't need a snubber, although the NTE/Sanrex package is much superior from a manufacturing POV. As ever, money talks!.
The NTE device might not be a q-quadrant device (marginally possible). An "alternistor" is designed for inductive loads and in practice acts quite differently form a standard triac and may give greif in an otherwise standard design. There should be a number of alternatives to allow a desirable package for a 20A triac.
From the wiki site it seems that it shouldn't be a big deal. If the thing works at all then it should work completely?
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