rhd
0
- Joined
- Dec 7, 2010
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Just do a parametric search on a manufacturers website (nxp, national semicondictor etc) to find a suitable transistor. I presume you do not need an exact equivalent, just something that meets or exceeds the specifications of the 437 and 438?
The challenge is (frankly) that I'm using these in a circuit designed by Jib, not by myself. So I'm not clear on what meeting or exceeding specifications means in this case (or more accurately, which specifications even NEED to be met).
The 437 is a remarkably beefy transistor for driving an Ophir with such low current consumption. Hence me wanting to replace them with surface mount parts. That said, I'm not clear on whether the parts I chose will for some reason not be appropriate.