Description
DT-1000VA step up down transformer
- Output socket fitted to the case, matched to your market standard
- Carrying handle for moving between benches
- Rotary input selector covering 110V, 120V, 220V and 240V
- Mechanical ON/OFF switch
- Fuse and MCB protection on the primary
- Warranty: twelve months from delivery
Functions
- Converts in both directions between 110–120V and 220–240V from the same unit.
- The input tap is set by hand, so the winding in use always matches the supply of the country you are working in.
- Non-standard primary and secondary voltages can be wound to order.
- Output follows the selected direction: 110V/120V or 220V/240V.
- A good match for bench instruments, printers, water dispensers, fans and fax equipment.

| Model | Capacity | Package Size (cm) | Qty/Package |
| ST/DT-100 | 100w | 41.5×27×38 | 12PCS |
| ST/DT-200 | 200W | 41.5×27×38 | 12PCS |
| ST/DT-300 | 300W | 48×29×41 | 12PCS |
| ST/DT-500 | 500W | 48×29×41 | 12PCS |
| ST/DT-750 | 750W | 48×29×41 | 12PCS |
| ST/DT-1000 | 1000W | 49.5×33×21 | 2PCS |
| ST/DT-1500 | 1500W | 49.5×33×21 | 2PCS |
| ST/DT-2000 | 2000W | 49.5×33×21 | 2PCS |
| ST/DT-3000 | 3000W | 54.5×33×24.5 | 2PCS |
| ST/DT-4000 | 4000W | 54.5×33×24.5 | 2PCS |
| ST/DT-5000 | 5000W | 54.5×33×24.5 | 2PCS |
| ST/DT-7500 | 7500W | 42.5×33×28 | 1PCS |
| ST/DT-10000 | 1000oW | 42.5×33×28 | 1PCS |
Specifications
Rated power: 500VA – 10,000VA across the range; this page covers the 1000VA frame
Primary: 110–120VAC or 220–240VAC, other voltages wound to order
Secondary: 220–240VAC or 110–120VAC, other voltages wound to order
Phase: single
Configuration: step up & down transformer / voltage converter
Termination: cord and plug, or terminal block
Socket on the case: yes
Conversion efficiency: 80%
Supply frequency: 50/60Hz
Working ambient: 0°C to +40°C
Protection: fuse and MCB, circuit breaker
Custom build: accepted with MOQ
Spare parts: by discussion
Warranty: twelve months
■ How to Choose This Transformer
Read the rating plate on the appliance before you look at the transformer. A device sold as “1000W” often draws more than its marketing figure, and anything with a motor or a compressor draws several times its running current for a fraction of a second on every start. Add up the input watts of everything that will be powered at the same time, then apply 1.5 × for heaters and electronics, 2.5–3 × for motors and pumps and up to 5 × for compressors.
Three details decide the exact specification:
- the supply voltage at the wall where the unit will be used, measured rather than assumed;
- the socket and plug standard of the destination market;
- whether the transformer will sit on a bench with a cord or be wired into a terminal block.
■ Where the 1000VA Frame Fits
One kilovolt-ampere is the smallest rating in the range that still drives a full workshop bench. Typical enquiries come from repair shops testing imported equipment, small production cells feeding a single machine, and retailers who want a compact converter that ships two to a carton and needs no installation work. If your calculation lands above 800W of resistive load, move up to the DT-1500VA step up and step down transformer.
Two ratio options are stocked most often: 220–240V down to 110–120V for imported appliances, and 110–120V up to 220–240V for equipment brought from North America into a 220V market. Both are the same unit with the selector moved, so a distributor needs only one SKU per rating.
The 1000VA frame is often specified with a universal socket in markets that use more than one plug pattern, because the appliance set on a bench changes more often than in a fixed installation.
■ Pricing, Ordering & Quality Assurance
Step Up & Step Down Transformer Price Range (100VA–10KVA)
Pricing for the DT/ST series depends on capacity, the input/output voltage combination you need, socket type, and whether a voltage selector or MCB protection is fitted. The table below gives indicative FOB levels so you can budget before requesting a firm quotation.
| Model | Capacity | Input / Output Voltage | Typical Application | Indicative FOB Price (per pc)* |
|---|---|---|---|---|
| ST/DT-100 | 100VA | 110V ↔ 220V selectable | Small electronics, chargers, control circuits | US$ 10–15 |
| ST/DT-200 | 200VA | 110V ↔ 220V selectable | Bench instruments, small appliances | US$ 11–16 |
| ST/DT-300 | 300VA | 110V ↔ 220V selectable | Audio equipment, laboratory benches | US$ 12-18 |
| ST/DT-500 | 500VA | 110V ↔ 220V selectable | Refrigeration units, printers, POS systems | US$ 12-20 |
| ST/DT-1000 | 1000VA | 110V ↔ 220V selectable | Power tools, kitchen equipment, single machines | US$ 21-30 |
| ST/DT-1500 | 1500VA | 110V ↔ 220V selectable | Motor-driven machines, imported appliances | US$ 23-35 |
| ST/DT-2000 | 2000VA | 110V ↔ 220V selectable | Compressors, welders, multi-outlet benches | US$ 25-37 |
| ST/DT-3000 | 3000VA | 110V ↔ 220V selectable | Small production lines, test rigs | US$ 33-43 |
| ST/DT-5000 | 5000VA | 110V ↔ 220V selectable | HVAC, industrial machinery | US$ 52-62 |
| ST/DT-7500 | 7500VA | 110V ↔ 220V selectable | Heavy workshop loads | US$ 75-87 |
| ST/DT-10000 | 10000VA | 110V ↔ 220V selectable | CNC equipment, whole-panel supply | US$ 85-112 |
* Indicative FOB Ningbo/Shanghai, standard configuration, based on 50 pcs per size. Not a formal offer — final price depends on your voltage combination, socket standard, enclosure and order quantity.
- The efficiency of the DT/ST series is 80%. For equipment with motors or compressors, the starting current will multiply — always reserve adequate power margin.
- Pure resistive / electronic loads: choose a transformer with capacity ≥ 1.5× the equipment rated power.
- Inductive loads such as motors and compressors: choose a transformer with capacity ≥ 2.5–3× the equipment rated power.
- This table is for reference only. Confirm the final solution according to the rated power and duty cycle shown on your equipment nameplate.
MOQ, Lead Time & Ordering Information
| Minimum Order Quantity (MOQ) | 1 PC for standard DT models. Smaller trial orders can be discussed for first-time buyers. |
|---|---|
| Custom / OEM orders | 50 PCS for custom voltage, custom socket layout, branded front panel or non-standard capacity. |
| Sample | 1-2 pcs sample available for verified buyers. Sample lead time 3-5 working days. |
| Lead time | 10-20 working days for standard models after order confirmation and deposit; 15-25 working days for OEM or custom configurations. |
| Packing | Export carton with foam. 1/2/6 pcs per carton – see the packing table above. |
| Payment terms | 100% TT IN ADVANCE FOR RETAIL/SAMPLE; 30% TT IN ADVANCE AS DEPOSIT, THE BALANCE BEFORE SHIPMENT. |
| Shipping | FOB Ningbo. CIF and door-to-door available on request. |
| Warranty | 12 MONTHS FROM DELIVERY DATE |
Certifications & Quality Assurance
DT/ST series step up and step down transformers are produced under our ISO 9001 quality management system, and every unit is 100% function-tested before packing.
CE Certified | RoHS Compliant | IEC Tested | ISO 9001 | EMC Tested | 12-Month Warranty
Certificates and routine test reports can be issued as PDF on request, for customs clearance, tender submissions or distributor onboarding.
■ FAQ
Is the DT-1000VA transformer the same as a 1000W travel converter?
No, and the difference matters when you size the load. The DT-1000VA transformer is a double-wound isolating unit rated in volt-amperes, whereas a “1000W” travel converter is usually a lightweight electronic device rated in watts at a much lower duty cycle. At 80% efficiency this frame carries about 800W continuously, and it holds that output on motor loads where a compact converter would sag.
Can I order a 220V to 110V converter 1000W as an ODM build?
Yes. Custom voltage combinations, alternative socket layouts, branded front panels and non-standard cable lengths are all produced to order, with a minimum of fifty pieces per specification. A 220V to 110V converter 1000W built to your own part number and packaging is a normal ODM request for us; lead time is 15–25 working days.
How to wire a step up transformer of this size?
Set the rotary selector to the voltage you actually measure at the wall, connect the input lead or terminate the primary into the terminal block, then energise with nothing connected and check the output socket with a meter. Add loads one at a time, heaviest first. If you are unsure how to wire a step up transformer into a fixed installation, bring the primary in through a lockable isolator so the unit can be taken out of service safely.
What will the 1000VA frame realistically run?
About 800W of resistive or electronic load, or 300–400W once the starting current of a motor is allowed for. Bench instruments, printers, kiosk terminals, small pumps and single power tools are all comfortable. Above roughly 800W of continuous load, move up to the 1500VA frame instead of running this one at its limit.
How is it packed for a first trial order?
Two units per carton at 49.5 × 33 × 21cm with foam inserts, and one or two pieces can be supplied as samples with a three to five working day lead time. A palletised 20ft container takes approximately 480 units at this carton size, and the 750VA and 1500VA frames share the same carton if you want to mix sizes.
Typical applications for the DT-1000VA
Where buyers actually put this frame — matched to the markets and duty cycles we ship into.
- Power toolsDrills, grinders and saws imported at 110V, sized with inrush headroom.
- Kitchen equipmentMixers, grills and coffee machines under 1,000W.
- Office and POS hardwarePrinters, credit-card terminals and displays.
- Small pumpsTransfer and circulation pumps where the panel voltage differs.
- Lab and clinic devicesAnalysers and sterilisers with a stable, quiet supply.
- Household appliancesThe most-shipped size for relocation and appliance importers.
Full specification — DT-1000VA step up & step down transformer
Every rating below is what we build to at the factory. Confirm your voltage combination and country standard when you enquire.
| Model | DT-1000VA |
|---|---|
| Rated capacity | 1,000VA |
| Number of phases | Single phase |
| Input voltage | 110-120V / 220-240V via rotary tap switch |
| Output voltage | 220-240V / 110-120V — the opposite of the selected input |
| Frequency | 50 / 60 Hz |
| Efficiency | 80% typical at rated load |
| Protection | Input fuse + MCB, ON/OFF switch with indicator lamp |
| Cooling | Natural air convection |
| Operating temperature | 0°C to +40°C |
| Enclosure | Ventilated metal case with carrying handle; socket optional |
| Compliance | CE, RoHS; produced under ISO 9001 quality system |
| Warranty | 12 months from delivery date |
Motors and compressors: multiply running watts by 3 for the starting surge before choosing capacity.
Download & documentation
Send these to your engineering or procurement team before you shortlist a supplier.
- Download the DT-1000VA datasheet (PDF)1,000VA single unit · ratings, protection, applications and ordering data
- Packing & carton quantitiesModel-by-model carton size and pcs per carton for freight costing
- Request the routine test reportPer-unit test sheet, CE / RoHS declaration and ISO 9001 reference, sent as PDF
Get a firm quotation in one working day
Tell us four things and we can quote without a second round of questions:
- Input voltage and output voltage (and the country standard)
- Required capacity in VA or the load list in watts
- Quantity for the first order and the annual volume
- Whether you need OEM branding, a custom socket or a non-standard voltage
Engineering reply, not a sales auto-responder. Samples of 1-2 pcs available for verified buyers.
Talk to the factory directly
- WhatsApp+86 156 5876 3197
- Emailsales@johsuntech.com
- Phone+86-15658763197
- Response timeWithin 24 hours, Mon-Sat
Related pages
FAQ
Will a 1,000VA unit run a 900W appliance?
That depends on the load type, not the watts alone. A 900W heater is fine; a 900W motor or compressor with a 3x starting surge needs a 3,000VA model. Always check whether the appliance has a motor, a compressor or a transformer-based supply inside it.
Is the output isolated from the mains?
No. The DT/ST series is an autotransformer, so input and output share a winding and the output is not galvanically isolated. Where isolation is required - medical equipment, wet areas, or where a fault could put line voltage on the load - specify an isolation transformer instead.
What is the difference between the DT and ST prefix?
Both are the same electrical design in the same frame; the prefix identifies the product family and market listing. Order by the model number on the nameplate of the unit you are replacing, and confirm the voltage combination before shipping.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.