Description
DT-5000VA step up down transformer
- Socket fitted to the enclosure, market standard to order
- Carrying handle for positioning before installation
- Rotary input voltage selector, 110V through 240V
- Mechanical ON/OFF switch
- Fuse and MCB protection
- Garantie : un an à compter de la livraison
Fonctions
- Converts between 110–120V and 220–240V, or the reverse, using the same double-wound core.
- The primary tap is set by hand to suit the supply at the installation.
- Standard positions 110V, 120V, 220V and 240V, with special voltages available.
- Output voltage follows the direction selected.
- Specified for HVAC plant, packaged machinery and small sub-distribution boards.

| Modèle | Capacité | Taille de l'emballage (cm) | Qté/Colis |
| 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 |
Spécifications
Rating: 5000VA continuous, single phase, 50/60Hz
Entrée : 110–120VAC or 220–240VAC, selected on the front panel
Sortie : 220–240VAC or 110–120VAC
Non-standard voltages: wound to order
Type : step up & down transformer / voltage converter
Input connection: terminal block for fixed wiring, or cord and plug
Socket on the body: yes
Efficacité : 80%
Fréquence : 50/60Hz
En milieu ambiant : 0°C to +40°C, indoor use
Protection: fuse and MCB protection, circuit breaker
OEM / ODM: accepted with MOQ
Spare parts: discussion
Warranty: twelve months
■ How to Choose This Transformer
Five kilovolt-amperes is the point where a converter stops being carried and starts being installed, so the decision is less about wattage than about what the unit will feed. Work from the total connected load rather than the sum of nameplate ratings, allow for diversity in the real installation, and then check the heaviest motor separately. Air-conditioning and refrigeration compressors have the highest inrush of any common load and will dominate the calculation.
Three decisions to make in advance:
- whether the load is a single appliance or a small distribution board, which changes the downstream protection;
- the conversion direction and the socket standard for the destination market;
- where the unit will live, because 10cm of clear air on every side is a requirement rather than a recommendation.
■ Protecting the Downstream Circuit
When this frame feeds a sub-board rather than one appliance, design the protection alongside the transformer. Fit a dedicated breaker on the primary sized to the transformer, distribute the secondary through its own breakers, and add an earth-leakage device on that side if portable tools are involved. A lockable isolator upstream lets the unit be taken out of service without disturbing the rest of the installation. Because a laminated core produces both audible hum and continuous low-level heat, keep at least 300mm between the case and any heat-producing equipment.
Because the 3000VA, 4000VA and 5000VA frames share one carton at 54.5 × 33 × 24.5cm, a pallet can be mixed across three ratings without changing box dimensions — roughly 260 units fit a palletised 20ft container at this size.
Allow 300mm between the case and any heat-producing equipment in the same room, and avoid mounting it on a lightweight partition that would act as a sounding board. Both measures cut complaints about noise in occupied areas.
■ 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.
| Modèle | Capacité | Input / Output Voltage | Application type | 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. |
| Délai d'exécution | 10-20 working days for standard models after order confirmation and deposit; 15-25 working days for OEM or custom configurations. |
| Emballage | 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. |
| Garantie | 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
What is the DT-5000VA rated for?
The DT-5000VA is rated 5000VA continuous, single phase, at 50/60Hz with 80% conversion efficiency. It converts between 110–120VAC and 220–240VAC in either direction through the front-panel selector, carries fuse and MCB protection, and accepts either a cord and plug or a terminal-block input. It ships two units to a carton at 54.5 × 33 × 24.5cm.
When should I choose a 5kVA step down transformer rather than a 3kVA?
Choose a 5kVA step down transformer when the simultaneous load passes about 1,800W, or when a compressor or air-conditioning unit is involved. Practical limits on this frame are roughly 2,600W of resistive load, 1,600W of pump and fan duty and 800W of compressor load. Above those figures the transformer is no longer the constraint — the protection and cable sizing become the limiting factors.
Can the same unit serve as a 5kVA step up transformer?
Yes. The winding is bidirectional, so the same hardware acts as a 5kVA step up transformer when the input selector is set to the lower voltage and the load is connected to the higher tapping. That is why distributors can carry a single SKU per rating rather than stocking separate step-up and step-down products.
How should the secondary circuit be protected?
Fit a dedicated breaker on the primary sized to the transformer, then distribute the secondary through its own breakers. If portable tools will be connected, add an earth-leakage device on the secondary side. A lockable isolator upstream lets the transformer be taken out of service without disturbing the rest of the installation, which is what most site electricians ask for on a 5KVA build.
What are the packing and container figures?
Two units per export carton with foam inserts, and roughly 260 units in a palletised 20ft container at this carton size. Because the 3000VA, 4000VA and 5000VA frames share the same carton, a pallet can be mixed across three ratings without repacking. Wooden-crate packing is available on request for shipments where the carton alone is not considered sufficient.
Demande de devis
Indiquez-nous vos spécifications, la quantité souhaitée ou le cas d'utilisation, et nous vous proposerons un devis sur mesure.