VCTVCT-5000J Japanese Voltage Converter Transformer Converts Japan 100 Volt to 110V or 110 Volt to 100v (5000 Watt)

Works great. Follow the instructions n there is no issue.

For someone who uses Japanese videogame consoles, small computers and in my case the XRGB Mini Framemeister this device is simply perfect. What this device does is convert United States 120 Volts 60hz AC to Japanese 100 Volts 60hz AC with a 500 watt maximum or if your in Japan, the opposite 100 Volts 60hz AC 120 Volts 60hz AC.The unit is a little heavy box with a slight audible hum which is to be expected since it's a transformer. It feels well constructed and both outlets on the front are nice and tight to ensure your electronics stay plugged in. I did test both outlets with a multimeter to ensure proper voltage in which it passed with the Japanese side showing around 101.2 Volts 60hz AC being transformed from 118.2 60hz AC, from my APC H15 Power Conditioner. Note that both outlets are live on the front meaning one could theoretically plug American and Japanese devices in at the same time but I personally wouldn't recommend it to extend the life of the unit.I played a full game of Sonic The Hedgehog 2 through my XRGB mini for about two hours and the unit is only lightly warm to the touch which is wonderful. The unit does have an on/off power switch on the back if you want to turn off the unit when not using a particular device along with a red LED to indicate the unit is powered, a five amp fuse and the unit comes with two extra fuses just in case. The default voltage setting switch is set to transform 120 Volts 60hz AC to 100 Volts 60hz AC. This can be switched if one were to ever to travel to Japan with American electronics. You would have to buy a three to two prong adapter to use the three prong receptacle thou being Japan uses two pronged outlets predominately.Even thou some electronic devices in Japan have a voltage tolerance that could work with 120 Volts 60hz AC, if they are designed to work only with 100 Volts 60hz AC they have to work harder transforming twenty extra volts to usually DC and that means more heat and a shorter life for the power electronics. So to be on the safe side, this device is perfect for anyone who wants to ensure their Japanese electronics will last a long life.

The Americas uses 120V as a standard and the rest of the world uses 240V. Japan is the exception with 100V. It's not much of a problem as most appliances come with a 100-240V universal adapter,or you can supply one with your own local voltage.The problem can be where you buy a great gadget in Japan,that was never meant to be exported outside Japan and the voltage is fixed at 100. The bigger problem is that it might not function at 120V. Modification by a service tech may be anywhere from expensive to impossible. This is where the VCT/VT-500J comes in handy and for only $36 if your appliance is less than 500 watts.I've had it a while and it works. It is meant for continuous operation,something I would not trust to a cheaper wall converter. It does use a fuse for safety reasons and comes with three spares,but it might pay to buy some extras. The design is very compact. The switch and pilot light are in the back with the power cord. I wish both were up front with the power outlets,but this is not a deal breaker for me.If you transfer to Japan, this will also step-up their 100V to 120V if you have some appliance fixed at 120V you would rather not replace. Be aware of the setting on the back of the unit. The default is US 120-100. Do not use the Japan setting unless you are in Japan or you may find the 120V outlet in front outputs 140V! Also note the power cord has a grounded US plug. Be sure to get an outlet adapter if you move to Japan. Chances are you can get one there easily,but that would depend where you are.

I bought the 500VA VT-500J transformer for use with a 100V 495W Zojirushi rice cooker (Japan Model), for use in the USA. In short - the transformer works and is decent for the price, but be well aware of the ratings (for example, without cooling, the transformer in this 500VA rating is likely only good for 100-125VA continuous!).As an electrical engineer, I work with power systems daily. I have worked with proper 500VA-rated transformers and they are significantly larger, typically weighing in at about 7kg. The transformer inside this as you can see is very small, about 1.5kg, and likely rated for no more than 100VA continuous operation. This is evident in the small-text the manufacturer is recommending, since they do say (in customer feedback in the comments section) to leave a 4x margin. Meaning this '500VA' transformer is in fact, more like a 125VA-continuous transformer.However, for the price (about $35), and keeping in mind that I'll be reviewing this as a 125VA unit (instead of a 500VA unit), it's decent. Construction is good sheet metal with a very nice powder coat finish. It operates in both 100 to 120V step-up and 120 to 100V step down operation (default). Soldering inside was OK, wires used were cheap but OK 22AWG PVC, and grounding was properly done with a locking washer and crimped terminal. Quick measurement for voltage conversion - 122.7VAC input gave me 104.0VAC output with no load - good enough.If I claim that the transformer is only 125VA, why am I using it for my 495W rice cooker? While a transformer of this size is only good for 100+VA continuous operation, it can operate at higher power levels for short periods of time. The limits are (1) thermal and (2) transformer saturation. In order to make this 'work' for my rice-cooker, I did some measurements and found that my particular rice cooker only turns on its heating element (which when it does, does draw about 500W) for fairly short periods of time (10s of seconds), before turning it on and off. As a result, the total average duty cycle is low. I also found the transformer performance to be acceptable at full load. Now we're left with thermals. To mitigate this, I added my own 120VAC fan on top of the transformer box. The unit draws just over 4A from my 120VAC outlet, so I kept the 5A fuse.I've run this box with my rice cooker many times now with no issues. Regardless, I am doing so knowing that I'm pushing the transformer to its saturation limits and keeping in mind that the overall duty cycle of my rice-cooker is fairly low. In addition, I DO NOT recommend modifying this product in any way, unless you’re absolutely sure you know what you’re doing, and understand that it will void your warranty.I will certainly NOT recommend this though for any product that uses 500W continuous for any period of time. For that, you will need to buy the 2000VA model. However, for smaller products which draw a lot less power, this is an acceptable unit.

Me encantó. Este si me funcionó para lo que necesitaba. Compré una dyson airwarp japonesa y ahora este aparato me da más confianza para utilizarla

this stepdown transformer has worked flawlessly with my home recording studio i purchased from japan. im in canada, i plugged it in when it arrived and its been on ever since. i would recommend it.👍

We are using it to reduce the voltage for IR heater that is designed for 100V.Reduction from 110 to 100V doesn’t seem like much but it completely stopped the appliance buzzing at max power and made it work stress free.I wouldn’t travel with it though. It’s too heavy.

It works great on our 100volt 1000 watt appliance. It's over capacity at 3000 watts but, that is not an issue, it's not loaded and has capacity for another Appliance.

Exactly as described and flawless operation so far.