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Tortech will be closed from 12pm on Thursday the 21st of December 2018

We still welcome enquiries during this period however there may be a slight delay on responding.

Last orders should be received by 19/12/2018 to be sent on the 20/12/2018. Orders received after the 19/12/2018 will be sent on or after the 07/01/2019.

Please note that there may be some delay in receipt of items after 07/01/2019 to cater for the Christmas Break back log.

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100 Watt Economy Step Down

Quick Overview

For USA devices 100 watts or less.  

Part No: SD110-100A

Weight: 1.50 KG

Availability: In stock

This Transformer will allow your USA device to run on Australian Power.
It changes 240 volts down to 110 volts.

This Step Down is for appliances  100 watts or less

Protect your US appliance - buy a step down that is guaranteed safe:


tick.gif Our  transformers are  made to the highest  Quality standards

tick.gif All our stepdowns come with a 1 Year Money back warranty

tick.gif Designed to protect your USA device

tick.gif Unlike others our step downs are designed to run continuously 24/7 - 

       read more about this very important difference.

tick.gif Quality casing & included Safety Fuse protection

tick.gif Thermal overload in the winding of the transformer

tick.gif Suitable for USA devices from 110v-120v

tick.gif Thermally tested to Australian Standard AS/NZS61558.


Unit Details:

  •  Converts Voltage down from 240 volt to 110/120 volt US 
  •  Safety fuse protection
  •  Auto transformer construction
  •  Fully enclosed unit in compact black housing
  •  1.5 metre long Australian Power Cord
  •  Dimensions: 130L x 90W x 70H
  •  Max Amps 0.91
  •   2 spare fuses included
  •  100VA Rating
  •  Part Number sd110-100A

Model comparison:

Will your stepdowns run 24 hours Continuously?  Why is this an important  difference between yours and others?

Tortech stepdown transformers are rated at a continuous rating.

This means the transformers are  designed to run at full rating as designated for a 24 hour continuously. Unlike others we do not deceive customers by  offering a short time rated rating, where  the transformer can not operate for periods longer then an hour  at maximum rating. 

For Example: A 2000w stepdown that runs for 1 hour at 2000w and then drops to 1400w rating continuous after.  This is a very important difference between Tortech units and we believe it is  false advertising to offer otherwise.  All Tortech stepdowns are guaranteed to  run at maximum rate continuously.

Qn: What makes your stepdowns much safer?

We use 2 methods of safety protection with our transformers:

1) Our Transformers use a fuse for short circuit protection and overload current conditions. This is to handle a very large increase in overload current.

2) Inbuilt thermal over load protection is the second method of protection with every enclosed transformer. This prevents the transformer from over heating.The transformer has incorporated into the primary circuit, a thermal overload switch which monitors the internal temperature of the toroidal transformer. 

Qn: Why do your transformers have much more energy efficient idle power (power when not in use) then others?

 The reason the Tortech range(>100va ratings) has such low idle current and idle watts loss is due to the core construction of the toroidal transformer magnetic core. The toroidal (round/donut) transformer uses better quality core steel (grain orientated silicon steel) that has lower losses than conventional EI (square) transformers . 

 Click here see the energy efficiency ratings calculations of our transformer Idle/no load currents.



  Quality standards


  CTick Approved




















Product Attachments

View FileIdle Currents power usage    Size: (266.35 KB)
View FileSafety Features    Size: (135.36 KB)
View FileFuse Replacement    Size: (53.9 KB)
View FileEconomy Stepdown    Size: (281.78 KB)


Question: I have an appliance from USA but for my understanding I have to step up to used in Australia from 120v to 240v can I am confused with step down. 10 May, 2014
Answer: Hi Alexandra, The voltage in America is 110-120v. The voltage in Australia is 240v. American devices run on 120v whilst Australian devices run on 240v. If you want to run a device purchased from America to run in Australia. You would need a step-down transformer to bring the voltage down from 240v to 110-120v to mimic the American supply.
Question: Hey, I bought an American Nintendo 64 I need to convert, is this 100W step-down converter what I need? 14 May, 2014
Answer: Based on our research online, the Nintendo 64 consumes about 19w. We would suggest the 100w American economy step-down transformer for this device. Our transformers come with a safety fuse, American output socket and spare fuses and are continuously rated.
Question: Hello I just wanted to confirm that this step down is appropriate for US AC power suply. Input 120 VAC 60 Hz 0.3 A Output 12 VAC 1000mA For guitar pedal containing 12AX7WA vacuum tubes. Thank You Trevor 28 Dec, 2013
Answer: Hi Trevor, You could use a 100W economy American step-down transformer. We would suggest an isolating transformer SD110-50 as it will provide you better common mode rejection. This will result in better performance.
Question: Will the 100 W step down transformer be suitable for a set of animal clippers that have an integral power supply of 120 V 50/60 Hz 0.8 A with an output of 5.5 VDC 2.5 A. The clippers will be used externally. 08 Jan, 2014
Answer: Hi Barrie, When buying transformers, it is very important to consider only the input ratings of the device. Since the clippers are rated 50/60Hz, you can use the 100w American economy step-down transformer. If the clippers were only rated at 60hz like most american equipment then they could malfunction even with a stepdown transformer. Clippers are one device that is frequency sensitive. read more here about this:
Question: Hi there, The US device says input: 120VAC 60 HZ 0.3A (36watt). Previously I bought a product code (SKU): SD110-50, which converts 240 to 110, output 50 watts. Is this still available as I have anotehr similar new device so I want another step down transformer please? Or if the CD110-50 is no longer availale, will the SD110-100 work just the same as I note product description it says it will work on devices 100 watts or less? Regards, Beth Cook 11 Jan, 2014
Answer: Hi Beth, We still have an isolated American step-down transformer rated @ 50W. The economy version starts at 100W.
Question: Is this product suitable for US hair curling products rated at 120v, 85w and 60Hz that heat to 430 degrees fahrenheit (220 degrees celsius) or is there something else you would recommend? 13 Jan, 2014
Answer: Hi Warren, We would recommend the 300 Watt American step-down transformer for your hair curling product as it has heating elements inside which may consume 25% more on start-up.
Question: When will this model come back in stock? 20 Jul, 2014
Answer: Available now - its our most popular compact transformer!
Question: I have bought an American Towel rail run 24/7 it need 80W to run at 120-110V Is it ok to buy the economic transformer 100W Thank you, Mohey 17 Sep, 2014
Answer: Hi, Since your American towel rail is rated just 80W, we would suggest the 100W American step-down transformer for this application.
  1. Works like a charm Review by Charlie

    This transformer works like a beut!
    My previous one overheated after 2 days of use...
    Your claims that your transformers are made different do stand up.
    Ive had this transformer for over a month, runs quietly, no overheating, no problem with my micro drill charger..
    thank-you Tortech for attention to quality... a rare thing these days!
    (Posted on 6/06/14)

  2. Works well, Peace of mind Review by Patricia

    This compact little stepdown works perfectly with my USA phillips wake up light.
    No concerns, just plug the device into the stepdown transformer and works perfectly!
    thanks (Posted on 14/05/14)

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Estimate Shipping

Enter your post code for a shipping estimate.

Please use our handy Step-down calculator to determine the correct rating of Stepdown Transformer (please wait for it to load.)

If you know the Watts of your device simply add in the Input Watts W of your device and press enter on keyboard.

If you know the Amps of your device , please put in the Input Amps A and Volts V and press the Update button below.

Note if you device has a motor tick the motor Box

Note: 120v , 115v , 110v for USA devices, 100v for Japan, 220v for Europe

You can also see our handy guide table at the bottom of the page with many USA devices makes and models and the common stepdowns recommended.


Watch Video - choosing the right stepdown transformer: 


Please Check these important 5 questions before purchasing your step down transformer:

1. What is the total watts used by appliances to be connected to the Transformer?

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.

2. Does your appliance have a motor ?

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.

3. Does your appliance have a mechanical timing device? 

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


Running a 5200 Vitamix on our stepdown:

4. Do you know the Amps of your device? - is so you can calculate the watts required:

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


5. Do you wish to use multiple appliances from one stepdown?

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

Still Not sure which Stepdown you will need?  see our detailed guide table at the bottom of this page

You may also  contact us with your reply to above questions & we will advise the unit that is required.


Note: Always look at the INPUT POWER rating - often underneath the bottom of your product on a spec label.

USA Equipment is identified as 110v, 115v , 120v  (requires a USA stepdown)    

Japan 100V (requires a Japan stepdown ) or 110V  

European 220v (requires a Euro stepdown)

Wattage - you need to check the Input Power Rating label on their Product  for the Watts (W) or the Amps (A) figures.If you see the HP (horse power) for a motor multiply it be 746 for watts then add 25% for motor.

See here for answers to other common questions.


Running a US amplifier from our 100w stepdown transformer

If you can't find the power details in the manual the most accurate way is to look at the spec label under your USA appliance to identify the Input Watts or Amps:


Some examples:


Label under the Kitchen aid (or in the manual)


Specs at the back of a US Playstation 3 (not slim):



On Your Cordless / Fast Charger

look at the power specs on the charger base:

Vitamix - Look at the Amps A behind the machine:


Dyson (Look under the Vacuum cleaner):


Appliances with power supply units

look at the power supply label Eg: XBOX

The Following is a General Guide to Products and their Power requirements and which Stepdown is needed.

Note: this is A General Guide Only and you should always check your particular device input amps or watts.

Products  Stepdown Transformer commonly needed

NES: 9 watts
Super NES: 10 watts
Nintendo 64: 19 watts
GameCube: 39 watts
Nintendo Wii: 45 watts
PlayStation 3 Slim: 96 watts

Clock radio 4 watts

100w stepdown

Desktop PC 380-600watts
PlayStation 3: 200-380 watts

Playstation 4 2.1A, or 252W maximum.

Xbox 360 Elite (2007): 185 watts
Xbox 360: 187 watts
XBOX 360 - 160 watts
Average PC: 118 watts
DirecTV HR20 DVR: 33 watts
Average plasma: 301 watts
Average LCD (standard): 111 watts
Average LCD (LED): 101 watts
50-56" Plasma television 191-474 watts
50-56" LCD television 210-322 watts
50-56" DLP television 150-206 watts
42" Plasma television 188-464 watts
42" LCD television 91-236 watts
32" LCD television 98-156 watts
19" CRT television 55-90 watts

300- 500w stepdown
Brother Sewing Machines 100w Stepdown
Small electronics  ipods/mobiles etc 50-250watts 100w stepdown
Amplifiers  / Home theatre systems 500-1000w stepdown
Hair Straightners 1000 - 1500w
Hair Dryers 1500- 2000W
Drills - Makita , Dewalt  300 w stepdown (because faster charger draws alot of current)

Nutribullet Pro 900 Series 900W motor

Nutri Bullet NBR-12 600-Watt motor

Nutri Ninja BL480 1000w

1500w stepdown

 1000w stepdown

 1500w stepdowm

Laptops and PCs 200-500W 500 w stepdown

Cuisinart PowerEdge 1000 Watt Blender. CBT-100


 1500w stepdown


KitchenAid Mixers:

All Artisans series use the 500w stepdown transformer






 Most of the professional series need 1000w stepdown transformer


New Kitchen aid 7 Quart Stand Mixer  series
KSM7990WH   1.3 hp motor (Max 1212) watts

7 Series Quart Mixers need the 1500w stepdown

KitchenAid Food Processors:

KFPM770 KFPM750 KFP0711 KFP1333ER KFPW760OB  KFP0922CU

KSM7990WH  has a 1.3 hp DC motor = 969w + 25% for motor = 1212 watt max - needs 1500w stepdown
 1000w stepdown transformer

1500w stepdown
4-slot Toaster 1440 watts 1500w stepdown

Jiffy Steam mops 2000J Steamers 1500W+(1300w)

1500- 2000W stepdown
Vacuums ~1500 -2000 watts


The Dyson DC39 Allergy uses 11amps - can use 1500w stepdown.

Most other Dyson models consume about 12amps

12 x 110 = 1320 + 25% (motor startup) = max  1650 watts best use the 2000w stepdown

2000w stepdown needed for models :

DC 41 Animal Complete   DC 41 Animal  DC 40 Multi floor  DC 33 Multi floor
DC 28 Animal  DC 25 Multi Floor  DC 24 Animal 12 Amps   DC 24 Multi Floor
2000 W stepdown
Expresso Maker 900- 1400 watts 1000- 1500w stepdown
VitaMix Blenders

All have powerful motors need to add 25% to watts to account for startup surge

Vitamix 5200  11.5 ampsx 110 + 25%  = max 1581 watts

Vitamix 500 Blender Specs: 120Volts, 60HZ, 11.5 Amps = max 1581 watts

VitaMix Pro 750 Specs: 120Volts, 60HZ, 12 Amps = max 1718 watts

Pro 300 120Volts, 60HZ, 12 Amps   = max 1718 watts

Vita-Mix® Professional CIA Series & Pro 200 Blenders 120Volts, 60HZ, 11.5 Amps (~1400 Watts)

Vita Prep 3 new models

(although it says 12.5 amp Not true max power! 3HP motor   3 x 746w = 2238w 

2000W Stepdown








2400W stepdown

Artograph Super Prism Projectors ( 2 bulbs)

Artograph Prism

1000W stepdown
Most treadmills  (up to 15 amps) over 15 amps 2000w stepdown 2400w stepdown

Power tools

Drop saw /circular saws


1500- 2000W stepdown

Warranty policy:

Products sold by Tortech come with a standard warranty period of 1 Year.
To confirm the warranty period see the category page description.
Note: We offer local servicing from our Sydney based office.
If you transformer is not working please check fuse & if needed replace the fuse before returning unit.
Exchanges and non-faulty returns have a restocking fee. See our returns policy for further information.