Simran THG-100 Simran 100W Step Down Transformer Voltage Converter for 220V to 110V Power Conversion

Ordered this to power kitchen appliances in my home in Thailand that I shipped from the US. Hum's a little but nothing that I would say is a problem, I have it next to my fridge, and that for sure drown's out any hum the transformer makes. As in other reviews, this a serious heavy duty unit, not designed for your average vacation traveller, little weighty, so for for packing in your suitcase to power vacation shavers, curling irons etc, so this ain't the one for you

Got this to plug in a 110v ultraviolet bulb in my AC cabinet. It works well and was easy to connect to both the AC line and the ultraviolet fixture.

Here's my experience with this device thus far - Brought to use in Serbia. Blew 2/3 fuses trying to get it to work until I decided to pay attention to the large warning that's clearly visible on the device that says to have your appliance(s) plugged in prior to plugging this transformer into the wall socket. After I did that, it hasn't been a problem since and has worked perfectly for just about a month now. I have a 110/120 volt surge protector plugged into it, which wasn't enough to prevent the transformer from blowing a fuse. But just about any device plugged into that surge protector will work. Currently I have a 600watt tower computer and a 24" LED TV plugged into it. Like most others who bought this I gave it 4/5 simply for the 'no on/off switch' but also because of the 'need to have a device using enough power plugged in before plugging the 220/240 end in. However, using a simple 220/240 surge protector to operate the on/off functionality of this device solves all these minor issues. So in conclusion, great device, works perfectly, but needs some minor adjustments to have a safe setup. So from the 220/240 socket in the wall buy a cheap surge protector for that, then plug this transformer into that, rather the wall. From there either plug in you 110/120 device, or a 110/120 surge protector if you have multiple devices. Just make sure before you flip the switch on the 220/240 surge protector that everything is ready to power up (on position). Great deal for the price, not too cheap, not too expensive, but requires a little maneuvering if that pesky on/off switch missing is a problem. Also having it connected to a 220/240 surge protector provides some safety as well imo.

If you have access to power for hot tub 220 v then this unit is for you. Without a switch, unit is a vampire. Wire a switch or use a plug. Well under a hundred dollars!

Purchase for a hot water pump and didn’t want to run an electrical line I added an extra ground wire. 220 to 110v works great I was afraid It would be under sized the pump had no amp rating motor was one fifth hp.

If all you need is the step-down function, don't bother with the much bigger step-up/step-down boxes. I bought 2 much larger units with step-up functions before moving overseas and both broke within the first year. I've had this now for 2 years now and it works great.

Needed a 10kW transformer to amplify the voltage for my 4.2kW plasma cutter from a 110V supply, and this thing looked like a perfect solution. It's advertised as "continuous" and "heavy duty" BUT after barely working a couple of months, for no longer than 2-3 hours a day, it at one point went happily down in a puff of smoke and loads of burnt wiring inside it. When I opened it up I discovered a mess: 1) There is NO fan inside it -- a fan is found in most cheap welding sets these days, one'd expect the Indians or the Chinese who assembled it to install one, but nope, no luck. So all the "cooling" is passive. 2) The insulation on wires around the core is plain THIN. Cheap stuff. Another measure to cut production costs down and reduce size. At the expense of performance and safety of course. 3) Everything appears crammed and even the few bits that didn't catch FIRE are oxidized. After contacting the Seller which when I bough the transformer went under the name of VCT ELECTRONICS, and asked for a refund or a replacement, I was told that it was my fault for burning the transformer, and wrongly quoted that "heating elements require 3x capacity". A 4.2kW plasma cutter has no heating elements inside it, and works by means of an electrical arc. So I was much and well under the 10kW range (had at least 5.8kW allowance, DUH...). They utterly refused to change or refund it. I would NOT RECOMMEND this transformer nor this Seller. Save yourself a few hundred bucks and buy something quality, with a fan and proper insulation, and from a REPUTABLE seller. Cheers.

The transformer is perfect for converting mains 230V AC to 115V AC. Because I stay in a 230V AC country, this device supplies my American and Japanese equipment that works with 115 AC. It is a real transformer with sinusoidal waveform. It should work fine in 220-240V countries to down convert to 110 - 120V I am confident there is no danger of damaging my equipment. I got the 500W model and that is good for devices consuming 1W - 400W in total. It however has a 600 ohm resistance between the primary and secondary earthing, but that is good for avoiding earth loops in audio and video devices.

Good product.

Ok. Good

Like other reviews, for the value this unit is great, the transformer is nicely constructed, the design is simple and it really does have the potental to run 100,000 hours before needing to be replaced, but the soldering inside the unit leaves very little to be desired, most of the conections could be simply pulled off by hand, now it's nothing that can't be fixed in five minuites, you will need a #2 philips screwdriver a soldering iron and some electrical solder, and solder every connection and make them solid , but being new you shouldn't have to do this. So unless your willing to open it up and use a soldeing iron to fix the quality control issue and end up with a good 240 to 120 volt converter, you might want to look at something else, especally if your going to be luging this item half way across the world.. Tip for the manufacture, you need to do two things if your going to use lead free solder correctly, you need to use the correct flux and the correct temperature so you don't end up with broken / cold solder joints and also sticking the wire though the holes drilled in the fuse holder and receptial end also would make soldering them easier and the joint stronger. But now I've take care of those issue I do expect it to last the next decade, running in a country with questionable electrial grids and constant voltage issue (both over voltage and under voltage)

I took this power transformer to Kenya and it worked great for my hair clipper and radio.

I will use whatever I’m in a country that has 220 only