[ISOLATED] American Step Down Transformer

From: $44.90 $28.60


[ISOLATED] American Step Down Transformer

(1 customer review)

Step down Transformer – American Voltage Converter for Australia Order Above

A step down transformer is the ideal solution if you have an appliance designed to run on America’s 110/120 volt system but is needed to run here on Australia’s 240 volt power.

This transformer converts 240 volts down to 110/120 volts to allow your USA device to run in Australia.

Simply plug transformer into the Aussie power socket & the device into the US power outlet & your ready to go!  

Protect your USA appliance – buy a step down that is guaranteed safe:

  • Our transformers are made to the highest quality standards
  • All voltage converters come with a 1 Year Money Back Warranty
  • Designed to protect your device
  • Unlike others, our voltage converters are designed to run continuously 24/7- read why important
  • Quality casing & included Safety Fuse protection
  • This new range is lighter & more compact
  • Safety fuse protection (300W and above)
  • Strong Carry handle, Enclosed and strong metal construction rubber feet (300W and above)
  • Thermal overload in the winding of the transformer
  • Thermally tested to Australian Standard AS/NZS61558

These features ensure your USA device runs safely on Australian power.

Note: If you are looking for our economy priced non-isolated (auto) stepdowns see here.

As featured on – read the Independent review of our Stepdowns.

To determine which below Step Down transformer you need please check these five questions first:

In-Store Appliance Testing

At TorTech, we encourage all of customers to come visit our office in Greenacre, Sydney for assistance in selecting the right voltage converter for you! Our team of specialised engineers are happy to examine your product and assist in helping pair you with our recommended voltage converter out of a wide range of stock.

If we don’t have a voltage converter in-stock that you require, we can manufacture you a custom transformer that will meet your needs! If you are experiencing any difficulties with our transformers with your product, we can help resolve the issue by testing both the transformer and product at TorTech. We aim to ensure you are satisfied with your decision and continue running your appliance without any problems.

Model Comparison

Part NumberWattsAmpsDimensions (l x w x h)WeightOutletsHandle
SD110--5050W0.45A130mm x 90mm x 70mm1kg1no
SD110-100100W0.91A168mm x 158mm x 91mm3.5kg1no
SD110-250250W2.27A176mm x 159mm x 105mm4.5kg1yes
SD110-500500W4.50A209mm x 162mm x 128mm7kg1yes
SD110-10001000W9.10A230mm x 182mm x 130mm10kg2yes
SD110-15001500W13.60A300mm x 230mm x 160mm13kg2yes
SD110-20002000W18.20A300mm x 230mm x 160mm16kg2yes
SD110-24002400W21.80A300mm x 230mm x 160mm16kg2yes

Select from our Step downs transformers based on how many watts your device uses. 

Choose the transformer rated above your devices watts usage.

E.g: Playstation 3 uses 380 Watts so you need the 500 watt rated stepdown transformer.

If a motor is included then you should select a stepdown rating approx 25% higher than your motor as a buffer.  

Motors have a higher power use on the stepdowns and startup currents which need to be allowed for.

Most motors have a rating plate on them with their Power and Amperage rating.

If so, how critical is this timing device?The Transformer cannot change the Frequency. It is 50Hz

If a timing device is included the speed of the device may change due to the frequency change, 60Hz to 50Hz (eg old clocks, motors / fans/microwaves ) Most modern electronic devices should not be affected. Read more about frequency

Calculated as Watts = Amps x 110Volts  (eg 5 A x 110 V = 550 watts)

Check total watts of all devices this must be less than the VA (Watt) rating of the stepdown & get a US Powerboard. 

Frequently asked Questions about the frequency difference, 110v, & more read here 

Still unsure which Stepdown you will need?  See our Guide to choosing the right stepdown  

You may also contact us with your reply to above questions & we will advise you the transformer required.

Quality toroidal transformer inside
Strong riveted carry handles
Voltage Converter Selector
  • Voltage
  • Amps or Watts?
  • Calculator
  • Results

Additional information


50W, 100W, 250W, 500W, 1010W, 1500W, 2000W, 2400W, 3000W, 3500W, 3500W w/ Hardwired NEMA Lead, 4000W

Product Enquiry

1 review for [ISOLATED] American Step Down Transformer

  1. Walter (verified owner)

    Once ordered, the step down transformer was delivered really quickly only taking less than 2 days from order to receiving the item in Canberra. However, the item sent was the step down for Japan, and not North American. A quick telephone call and Tortech issued the postal return paperwork, and almost simultaneously sent the correct American step down, even before they received my returned step down for Japan.

    While there was a small error in the process, the customer service in response to the error was great. Many thanks for your good, prompt customer service.

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Item 1 – Cast Resin type Isolation Transformer

HV Winding 1

LV Winding 1

LV Winding 2

Rated power





Rated voltage








Off circuit tapping links


±2.5%, +-5%







Vector group


Insulation level (Maximum BIL/AC)





Winding material

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Type of winding

Vacuum Resin Cast

Vacuum Resin cast

Vacuum Resin cast


AS 60076-11, AS 2374



Degree of protection


Type of cooling


Installation altitude

< 1000 a.m.s.l


And fire behaviour class