Step Down Transformer for Iran: 230V to 110V Guide
Iran uses 230V / 50Hz, supplied across the country. Imported US and Japanese appliances at 110V need a step-down transformer. This guide covers sizing, selection and buying for the Iranian market — Tehran, Isfahan, Mashhad and the industrial and household sectors.
Iran voltage reality
Iran uses 230V / 50Hz, supplied across the country. US appliances rated 110V need a step-down transformer; the 230V nominal is at the top of the common range, so transformer output accuracy matters.
What buyers in Iran need
- 230V to 110V step-down transformers for US and Japanese appliances.
- Step-up transformers (110V to 230V) for equipment moving to 110V markets.
Sizing a transformer for Iran
| Appliance | Typical wattage | Recommended model |
|---|---|---|
| TV, phone chargers, lamps | 100-300W | ST-1000 |
| Refrigerator / freezer | 300-800W (surge x3) | ST-2000 |
| Washing machine | 500-2000W | STU-3000 |
| Microwave, iron | 1200-1800W | ST-2000 or larger |
230V supply and transformer accuracy
Iran nominal supply is 230V. For accurate output to a US 110V appliance, order a unit wound for 240V or with input taps. Wilmall builds ST series with 240V primary windings on request.
RCD and dry climate
Iran has a mostly dry climate with hot summers. RCD protection on the transformer is essential for safety against earth leakage in older wiring. Wilmall ST series includes RCD as standard.
Buying for resale in Iran
Iranian distributors stock 1000VA, 2000VA and 3000VA step-down transformers. Private labelling with your brand, English labels and export-grade cartons is available from MOQ 10 pcs.
Common mistakes to avoid
- Undersizing for motor loads. Add margin.
- Using an electronic converter. Most cannot start motors.
- Skipping RCD protection. Older wiring may have earth faults.
Warranty and After-Sales for Iranian Buyers
Iranian buyers face a few practical realities when importing transformers, and a supplier who understands them is worth more than the cheapest quote. First, ask how warranty claims are handled from Iran. Shipping a single failed unit back to China is usually not practical, so look for a replacement-first policy. Ours is simple: if a unit fails within the 12-month warranty, we ship a replacement with the next container to Bandar Abbas or another port you specify, and settle the paperwork after. Second, request the batch test report with your order. We load-test and hi-pot test every unit and keep the records on file, and the report travels with the shipment so your customs clearance and your own quality checks are straightforward. Third, confirm the model range before you commit. For Iranian distributors, the 1000VA and 2000VA sizes cover most household and small workshop needs, and we keep those in stock for faster dispatch. A transformer is a long-term investment, and the after-sales relationship is what turns a first order into repeat business.
What voltage does Iran use?
Iran uses 230V / 50Hz. US appliances rated 110V need a step-down transformer.
Do I need a 240V primary transformer for Iran?
For accurate output, yes. Order a unit with 240V primary or with input taps.
What size transformer for a refrigerator in Iran?
A 2000VA ST-2000 covers a standard fridge-freezer with margin.
Why does an Iranian transformer need RCD protection?
Older wiring may have earth faults. RCD protects against leakage current shock.
What is the MOQ for Iran orders?
Our MOQ is 10 pcs per model.
Related reading
Get a factory-direct quote
Email sales@wilmall.com or WhatsApp +86 197 3022 6757.
Iranian import channels and sanctions awareness
Trade with Iran involves specific banking and shipping arrangements. Confirm your payment route and shipping terms with your bank and freight forwarder before ordering. Wilmall ships on FOB or EXW terms with standard export documentation; the buyer handles destination-side arrangements.
Appliance demand in Iranian homes
Iranian households import US kitchen appliances, home theater systems and power tools, all needing step-down transformers. The 1000VA and 2000VA sizes cover most household needs, with 3000VA for washing machines and larger appliances. Distributors stock these three sizes as the core range.
Generator use during peak hours
Iran experiences peak-hour load shedding in some regions. Households and small businesses run generators during these periods. A transformer with 30% margin tolerates generator output swings, keeping appliances running safely. This is a common requirement for Iranian buyers.
RCD and older wiring
Some Iranian buildings have older wiring without proper earth protection. RCD protection on the transformer provides a safety net by tripping on leakage current. This protects both the user and the appliance from faults in the building wiring. Wilmall ST series includes RCD as standard.
Starting an Iran order
Contact sales@wilmall.com or WhatsApp +86 197 3022 6757 with your market and appliance list. We recommend the transformer range, confirm pricing and documentation, and ship FOB Ningbo or Shanghai. MOQ 10 pcs per model, 15-25 day production lead time.
Iranian import channels and sanctions awareness
Trade with Iran involves specific banking and shipping arrangements. Confirm your payment route and shipping terms with your bank and freight forwarder before ordering. Wilmall ships on FOB or EXW terms with standard export documentation; the buyer handles destination-side arrangements.
Appliance demand in Iranian homes
Iranian households import US kitchen appliances, home theater systems and power tools, all needing step-down transformers. The 1000VA and 2000VA sizes cover most household needs, with 3000VA for washing machines and larger appliances. Distributors stock these three sizes as the core range.
Generator use during peak hours
Iran experiences peak-hour load shedding in some regions. Households and small businesses run generators during these periods. A transformer with 30% margin tolerates generator output swings, keeping appliances running safely. This is a common requirement for Iranian buyers.
RCD and older wiring
Some Iranian buildings have older wiring without proper earth protection. RCD protection on the transformer provides a safety net by tripping on leakage current. This protects both the user and the appliance from faults in the building wiring. Wilmall ST series includes RCD as standard.
Starting an Iran order
Contact sales@wilmall.com or WhatsApp +86 197 3022 6757 with your market and appliance list. We recommend the transformer range, confirm pricing and documentation, and ship FOB Ningbo or Shanghai. MOQ 10 pcs per model, 15-25 day production lead time.
Common Iranian appliance loads and sizes
Iranian households import US refrigerators, washing machines, microwaves and kitchen appliances. The 1000VA and 2000VA sizes cover most needs, with 3000VA for washing machines and larger loads. Distributors stock these three sizes as the core range.
The 230V supply and transformer accuracy
Iran nominal supply is 230V. For accurate 110V output, order a transformer wound for 230V or with input taps. Wilmall builds ST series with 240V primary windings and multi-tap inputs on request.
Workshops and industrial users
Iranian workshops and small factories import US tools and equipment. Sizing for tool surge with margin covers most loads. Three-phase step-down transformers are available for industrial machinery.
RCD and earth leakage protection
RCD protection on the transformer provides a safety net in buildings with older wiring. Wilmall ST series includes RCD as standard, protecting users from earth leakage faults.
Hotels, hospitals and commercial demand in Iran
Iranian hotels, hospitals and offices import US equipment that needs conversion. A hospital installing US medical devices may need isolated step-down transformers for patient safety. Wilmall builds isolating ST series units for medical and laboratory applications.
Why buy from a Chinese factory directly
Buying from the factory removes the trading margin and gives you control over the specification, the label and the documentation. Wilmall supplies ST series step-down transformers from Yueqing, China, with copper winding, RCD protection and 12-month warranty. MOQ 10 pcs per model.
Three-phase and industrial sizes
For Iranian factories and workshops running three-phase machinery, Wilmall builds project-sized three-phase step-down transformers. Specify the machine voltage, current and connection type for a quotation.
Appliance market in Iran
Iranian households import US kitchen appliances, home theater systems and power tools. The 1000VA, 2000VA and 3000VA sizes cover the majority of demand. Distributors stock these three as the core range with private labelling available.
Isolation for medical and laboratory use
Iranian hospitals and laboratories import US devices that require isolated power for safety and accuracy. An isolation transformer separates the windings, blocks noise and protects sensitive electronics. Wilmall builds isolating ST series units for these applications, with accurate 110V output.
Private labelling for Iranian brands
Iranian distributors can private-label transformers with their own brand, labels and cartons. Wilmall supports full branding from MOQ 10 pcs per model. A branded range builds local recognition and customer trust.
Documentation and shipping
Every shipment includes commercial invoice, packing list, CE / RoHS certificates and batch test reports. We ship FOB Ningbo or Shanghai with full export documentation. The buyer handles destination-side clearance and banking arrangements.
After-sales support
Every Wilmall transformer carries a 12-month warranty. We hold common spare parts and respond to support enquiries within 24 hours. Documented batch test records simplify warranty claims and build long-term buyer confidence.
Final recommendation for Iran
For Iranian homes and workshops, the ST-2000 (2000VA) with 230V primary is the recommended core size, with ST-1000 for small appliances and STU-3000 for washing machines and larger loads. All units are factory direct from Yueqing, China, with copper winding, RCD protection and 12-month warranty. Contact sales@wilmall.com or WhatsApp +86 197 3022 6757 for a quotation.
Summary
Iranian buyers should order transformers wound for the 230V nominal supply, with RCD protection for older wiring and 30% margin for motor loads. The ST series from Wilmall meets all three requirements, backed by full documentation and factory-direct pricing.
Warranty and support
Every Wilmall transformer carries a 12-month warranty, and we hold common spare parts for fast resolution. Batch test records ship with every order, simplifying warranty claims for Iranian importers. We respond to support enquiries within 24 hours.
Safety and installation tips
Mount the transformer in a ventilated location, away from heat sources and water. Use a grounded outlet on both sides. Check the RCD monthly by pressing the test button. For buildings with older wiring, RCD protection on the transformer is a valuable safety net.
Contact Wilmall
Email sales@wilmall.com or WhatsApp +86 197 3022 6757 with your appliance list, target market and quantity. Our export team replies within 24 hours with a product recommendation, factory-direct pricing and a sample plan. MOQ 10 pcs per model, 15-25 day production, full documentation with every shipment.
