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Reply to "Any concerns using a TMCC equipped locomotive with a reconditioned ZW 275 watt transformer run in the conventional mode?"

SilverChief posted:

They said it wasn't necessary to add these. Something about the sine waves are cut by half??? 

Unfortunately, your LHS misunderstood your ask and purpose of the TVS diodes. They are somewhat correct in that a traditional diode would act the way they are attempting to articulate, but completely missed the full context and provided inapplicable advice.

It is also unfortunate that most LHS likely don't stock TVS diodes just like they don't stock transistors, resistors, or capacitors. You need to use an electronics supplier.

Favorites online are digikey.com, mouser.com, newark.com. You can also find some on the 'bay as well. Just enter in the part number into their search:

bmoran4 posted:

 

For power supplies in excess of 18VAC, such as your ZW, use the 1.5KE36Ca diodes.

If you only use supplies that are limited to 18 VAC then you could get by with 1.5KE33Ca diodes.

 

Last edited by bmoran4

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