Can I replace 11.5VAC 12.5A with 15VAC 1.25A?

Hi,

as of my experience - longer time ago - you could not do !!

Your maximum power consumption for your old one is 11.5 VAC * 12.5 A ~

So if your load on the replacement is about over 18 Watts, your Transformers Fuse will break.

Use a replacement with the same power and also the same voltage ! Power may be more but not less than the ~133 Watts. But your voltage should be the

If you only change the fuse to a higher current (about 12.5 A) you propably burn down your home !!

Buy a replacement by giving the purchaser the old one for reference, if you are not sure.

Regards, Lothar

...

I'd figure out a way go gin up a 12.5A load at 12V. You're sure that the original is AC out? Then if your transformer - well, three pounds isn't very big.

Do you have any other information on the transformer?

You could do some tests, like with car headlight bulbs, to see what kind of current your existing transformer is good for, but use a 1.25 or, at the max, a 1.5A fuse in its primary.

Otherwise, you could look around for surplus dealers - they sell stuff like that by the pound.

Good Luck! Rich

You didn't mention that the output of your original device is 45 KHz. This is not a simple transformer. You will not find a replacement at your local parts store and your big transformer is not going to do the job. Spend the $80.

Because it isn't actually a *transformer* it's a swtich mode power supply.

Graham

Well you should be. A halogen filament lamp's life will be lucky to be measured even in hours if you overvolt it that much.

Graham

The web site specifies *240* volts input, not 120 volts. Were you running the thing at 120 volts input? Maybe that's why it broke? (Its a switcher, so it may be able to run at 120 - what do the instructions say?)

And the job is ... what? Light some halogen bulbs? How will the "big" transformer will be protectd from overheating? How will the bulbs (assuming that it is a halogen setup) be protected from over or under voltage? If you have considered those points - great. If not, they need to be addressed.

Ed

Thanx to all who replied and prevented me from burning down my house. I found the exact replacement for $32.00 which is within my budget.

Thanx again.

Thanks for reporting back! It's always a pleasure to find that one's suggestions have had worthwhile results. :-)

Cheers! Rich