1. Mouser shows several DO-35 zener diodes that are apparently able to
dissipate 5W. Is this really (safely) possible?

http://ca.mouser.com/Semiconductors/Discrete-Semiconductors/Zener-Diodes/_/=
N-6hpds?P=3D1z0z7uzZ1z0w7s7

2. Is mounting through hole power components vertically (like in the shape
of an up side down U) on the PCB better for thermal dissipation?
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.