Sevenstar ST-750 Step Up/Step Down Transformer (750W)

Sevenstar ST-750 Step Up/Step Down Transformer (750W)

Sevenstar ST-750 Step Up/Step Down Transformer (750W)

B&H # SEST750UD MFR # ST-750 U/D
Sevenstar ST-750 Step Up/Step Down Transformer (750W)

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Product Highlights

  • 110/117/120V to 220/230/240V
  • 220/230/240V to 110/117/120V
  • High Capacity Shock-Proof Socket
  • US to Euro Power or Euro to US
  • Includes Two Spare Fuses
  • Includes Flat Pin Adapter Plug
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Sevenstar ST-750 U/D overview

  • 1Description

Use your electronics in more places with the ST-750 Step Up/Step Down Transformer. This transformer can handle up to 750 watts of power, converting 110 to 120 VAC-rated appliances for use on 220 to 240 VAC power grids or converting 220 to 240 VAC-rated appliances for use on 110 to 120 VAC power grids. Each of the high-capacity sockets are shockproof and a pair of spare fuses as well as a flat pin adapter plug are included.

UPC: 769981071378
In the Box
Sevenstar ST-750 Step Up/Step Down Transformer (750W)
  • Flat Pin Adapter Plug
  • 2 x Spare Fuse
  • Limited 90-Day Warranty
  • Table of Contents
    • 1Description

    Sevenstar ST-750 U/D specs

    Maximum Wattage 750 W
    AC Input Voltage 110 to 240 VAC
    Packaging Info
    Package Weight 10.8 lb
    Box Dimensions (LxWxH) 7.8 x 6.5 x 4.4"

    Sevenstar ST-750 U/D reviews

    ST-750 Step Up/Step Down Transformer (750W) is rated 4.5 out of 5 by 2.
    Rated 4 out of 5 by from Good, but replace the plug right away Used to step up voltage to power a 220-volt device. It can be used to step down 220->110 or 240->120 as well. Although it is labelled 110, 220, etc, it simply either doubles or halfs the input voltage, whatever that may be. Feed it 120v and you'll get 240v from the 220v out (if you are stepping up). It does not regulate voltage. It is a transformer. It is fused and comes with 2 extra fuses. The input selection jumper should be at 110v in the US. US household voltage is now officially 125V +-10%. After a few hours it got warm, but not hot. There is a tiny bit of vibration, felt but not heard, suppressed by placing a heavy object on top of the unit. The most serious problem and safety concern is that the amp came with a two-prong plug that looks like a CEE 7/7 plug. When used in the US, the ground connection is lost. Not good. Its power cable contains 3 conductors though. Opening the transformer up showed that, internally, it is properly designed and passes ground to the output. But its plug effectively removes the ground from the input. Cut out the supplied plug and attach a 3-prong plug. If you do that, check the wiring at the output. If you are getting ANY voltage anywhere on the output while the transformer's switch is in the OFF position, go back and swap hot and neutral on the input plug. Safety first. I have it fed 108v (from an autotransformer), so I am getting 216 v at the 220 output. I am drawing no more than 250 watts from it (that's 1/3 of the rated capacity), and so far no problem.
    Date published: 2015-05-25
    Rated 5 out of 5 by from Works as it should. Purchased to use a a step-up transformer. Works great, no complaints and a great price.
    Date published: 2016-05-22
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