Voltage question


 Would a component from Japan that is rated 100 volts be safe to use here on 110-120 volts, without some type of transformer or the like?  TIA  Mike


winoguy17
 As stated in the OP ,its rated 100v.   So far Ive been told:
1. Need a transformer2. Its fine.3. Dont even plug it in.Appreciate your thoughts. If I do pursue this I would probably look into stepping down the voltage. Where is a good place to look for one?  Thanks again.
winoguy17 OP655 posts

03-02-2020
6:28am

As stated in the OP ,its rated 100v.


If I do pursue this I would probably look into stepping down the voltage. Where is a good place to look for one? Thanks again.

I would first check the AC mains voltage with a volt meter at the wall outlet to see what you have. Check it a few times through the day to get an average reading, measurement. Does it average 120V - 123V? Does it average 118V - 120V? Or maybe 119V - 121Vac?

Be careful of buying a cheap so called voltage converter that says to size the unit at two times or more the rated load of the item that will be plugged into it. You might want to also read the customer reviews on the unit if there are any. I have a feeling the manufacturer of the really cheap so called voltage converters are under sizing the wire gauge used in the winding/s.

Here is a step down transformer manufacturer I found, searching the Agon archives, from an Agon member that posted on a thread. I used his link and found these two transformers that should meet your AC mains voltage. The smallest wattage transformer I could find is 300 watt.

https://acupwr.com/collections/japan-to-usa-transformer-converter-use-100-volt-appliances-in-110-vol...

This Link is from a retail seller, I believe.
https://www.bhphotovideo.com/c/product/964851-REG/acupwr_ajd_300_ctoc_japan_to.html.
.
easy, amazon prime, $30. have it tomorrow.

https://www.amazon.com/VCT-VT-200J-Japanese-Transformer-Converts/dp/B081TLK87S/ref=asc_df_B004S2COIC/?tag=hyprod-20&linkCode=df0&hvadid=226131567976&hvpos=&hvnetw=g&hvrand=15901971708719460343&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9003512&hvtargid=pla-390921810426&th=1

they have several, they vary according to the amount of watts the device draws. Voltage must match, and watts simply have to be enough for the device(s) it feeds, CD player is not gonna need more than this 100 watt version..

A device will only draw what it needs, like a 60 watt bulb draws less from a line rated for much much more.

Volts are volts, i.e. Apple's 5 volt chargers. the amperage is low or high (amperage is relative to watts), so they keep raising the needed amperage so you need to keep on buying new adapters. And, they keep changing the connector types, the ........


Stepping down the voltage is the correct solution. Running it at 120 volts can cause problems... for example if a secondary voltage somewhere inside the unit is, say, 34 volts and there are 35 volt capacitors, then 120 volts on the primary will increase the secondary voltage above the rating of the capacitors and...poof. So unless you are dead sure about the voltage ratings of the parts inside, step down the voltage to where it is supposed to be. Simple physics, not misinformation.