ST-1500 Step Up & Step Down Transformer 1500W
1500W ST-1500 step up and step down transformer with automatic voltage selection.
- Factory-direct pricing, no middleman markup
- Custom voltage, capacity and branding (OEM)
- MOQ from 10 pcs, production 15–25 days
- 12-month warranty with reliable support
- Made to order per spec: MOQ 10 pieces
- DT series 110V/220V stock units: MOQ 1 piece
- Custom voltage: MOQ 10 pieces
- Custom socket/plug: MOQ 50 pieces
- Custom color box (print plate): MOQ 1000 pieces, negotiable
- Power cord type & private label: free choice, no extra MOQ
- Lead time: 15-25 days (in-stock 3-5 days)
- Sample order: paid by T/T before production
- CE/RoHS on request; additional certifications negotiable
This ST-1500 unit is one of the workhorses of our step up & step down line. Plug it into 220V mains and it safely converts to 110V for your US or Japanese appliances — or feed it 110V and it steps up to 220V. It handles both directions automatically, so there’s no switch to flip and no room for wiring mistakes.
Key Specifications
| Input Voltage | 220V–240V AC (110V–120V models available on request) |
| Output Voltage | 110V–120V ↔ 220V–240V (automatic) |
| Capacity | 1500VA (1500W) |
| Frequency | 50Hz / 60Hz |
| Protection | Fuse / MCB protection |
| Output Sockets | Optional (US/EU/UK styles) |
| Extras | Carrying handle, input selector |
| Warranty | 12 months from delivery |
| Combination | Availability |
|---|---|
| 110V ↔ 220V | Standard (automatic) |
| 120V ↔ 240V | Standard (automatic) |
| 110V ↔ 240V | Available on request |
| 120V ↔ 220V | Available on request |
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Why Choose This Model
There are a lot of step up and step down transformers on the market, so let us be straight about what makes this one different:
- Real transformer, not a switcher. Many “voltage converters” under $30 are electronic choppers. This unit is a wound-copper transformer with a silicon steel core — heavier, cooler and built to run for years, not months.
- Automatic dual-direction conversion. 220V to 110V and 110V to 220V in one unit, with automatic selection. No switch to flip, no wiring mistakes.
- Rated for 1500W. Enough headroom for most household and workshop loads without running hot.
- Built to your market. Choose US/EU/UK sockets, your color, your branding. We are the factory, so nothing is locked in.
- Protected and backed. Fuse and MCB protection, 12-month warranty, CE / RoHS / ISO9001 production standards.
What It Can Do for You
We get asked about this transformer constantly, and the questions usually sound like one of these:
- “I moved abroad and brought my US appliances.” Run blenders, coffee machines, laptops, TVs and small power tools on local 220V mains.
- “My Japanese machine runs on 110V but the factory only has 220V.” Feed it 220V in, get 110V out — exactly what this unit does automatically.
- “I’m a distributor stocking for my local market.” We supply in volume with your branding, your sockets and your carton. MOQ from 10 pcs.
- “I need it for a single appliance, not a whole house.” This is a plug-and-play unit for one device at a time, up to 1500W.
A quick honesty note: this transformer is not sized for air conditioners or heavy inductive loads above 1500W. If your appliance draws more, tell us your wattage and we will point you to the right model rather than sell you something undersized.
Questions Customers Ask Us
Will it run my 220V appliance on 110V mains?
Yes — it converts both ways automatically. That is the point of the dual-direction design.
What can I run with 1500W?
Most small to medium appliances: laptops, TVs, coffee machines, blenders, printers, small power tools. If it draws more than 1500W, size up.
Can you put my logo on it?
Yes. OEM branding is available from 10 pcs — your brand on the enclosure and carton.
What is the delivery time?
Production takes 15–25 days depending on quantity and customisation, then shipping to your country.
Do you offer samples?
Yes, samples before mass production are welcome. Most customers test one unit first.
More from This Range
Need more power or a different voltage combination? Browse the full conversion lineup:
DT-1000VA Step Up & Step Down Transformer1000W dual-direction converter, automatic 220V/110V.
ST-1500 Step Up & Step Down Transformer1500W dual-direction converter for larger loads.
STU-3000 Step Up & Step Down Transformer3000W heavy-duty converter for household and workshop loads.
STU-5000 Step Up & Step Down Transformer5000W high-capacity converter for demanding equipment.
See all options: Step Up & Step Down Transformers
Ordering Notes
Need a different capacity? We build this series from 100W up to 10000W, with or without sockets, in your brand’s color. MOQ from 10 pcs, production 15–25 days. Sample before mass production is welcome.
Questions about this model? Send an inquiry (sales@wilmall.com) or WhatsApp +86 19730226757 — we reply within 24 hours.
Frequently asked questions
What does the ST-1500 do?
It converts 220V-240V mains down to 110V-120V for US appliances, and works in reverse to step 110V-120V up to 220V-240V – one unit covers both directions.
What can a 1500W transformer run?
1500W continuous covers most household and shop loads: TVs, monitors, fridges, water pumps, power tools, small kitchen appliances. Size up if your appliance draws high start-up current.
Do I need to select the voltage manually?
No – voltage selection is automatic. The ST-1500 reads the input and switches itself between step-up and step-down, so there is no tap or wiring guesswork.
Which socket and plug options are available?
Output sockets are optional in US, EU or UK styles; input plugs can match your country. Custom combinations are made to order.
What are the MOQ, lead time and warranty?
Made-to-order MOQ is 10 pcs, lead time 15-25 days (in-stock 3-5 days). Fuse/MCB protection is built in and a 12-month warranty from delivery applies.