Sourcing · 10 min read · Updated November 2026
Tariffs, Surcharges and 20-Week Lead Times: Sourcing Automation Parts from Vietnam in 2026
US buyers face stacked duties on imported controls and drives, European buyers face supplier surcharges and allocation, and both face lead times that quote in quarters. Buying through Vietnam is not a loophole — it is a logistics and compliance question with clear rules. What works, what does not, and how to document it so customs and your auditor are satisfied.
Three things changed the economics of automation parts between 2024 and 2026. The United States layered Section 301, IEEPA and reciprocal tariffs on top of each other, so controls, HMIs and drives of Chinese origin can carry combined duties in the tens of percent, and many non-Chinese goods carry new baseline duties. Manufacturers responded with surcharges — Endress+Hauser raised its supply-chain surcharge to 8.4 %, Rockwell and Siemens pushed list prices, Weidmüller added item-level tariff surcharges — and with regional stocking that favours large accounts. And a DRAM/NAND shortage driven by AI data-centre demand stretched lead times for anything with a processor: we have seen quotes of 20–40 weeks on PLC CPUs, HMIs and VFDs in 2026. Buyers who used to order on Monday for Friday are now asking a different question: where in the world is this part available, at what landed cost, with what paperwork?
What a Vietnam-based supplier can and cannot do for you
Start with what we cannot do, because it is where most misunderstandings happen. A Siemens CPU made in Germany does not become Vietnamese by passing through Hai Phong. Country of origin is determined by where the product was manufactured or last substantially transformed, and it is printed on the product and declared on our commercial invoice. Trans-shipment to disguise origin is customs fraud in every jurisdiction and we do not do it. What we can do is real and useful:
- Access to ASEAN and Asian distribution stock. Siemens, Mitsubishi, Omron, Delta, LS, Schneider and the instrument makers all run regional distribution in Asia with their own stock positions. A CPU on 20-week allocation in Chicago may be on a shelf in Singapore, Bangkok or Ho Chi Minh City. We buy from authorised channels in the region and ship worldwide.
- Products with Asian origin and favourable tariff status. Many products are made in Japan, Korea, Taiwan, Vietnam, Thailand, Malaysia and Singapore — Mitsubishi FX5U (Japan), Omron NX (Japan), Delta (Taiwan), LS (Korea), Moxa (Taiwan), Advantech (Taiwan), Siemens S7-1200 (some production in China, some in Germany), Endress+Hauser (Germany, Switzerland, with Asian plants for some lines). Origin is verifiable from the label and matters for US duty rates.
- Alternatives. When the specified brand is on allocation we propose functional equivalents from the manufacturers we document — a Delta MS300 for a small VFD, an LS XGB for an FX3, an ifm pressure sensor for an IO-Link point — with the technical comparison written down so your engineer can approve it.
- Consolidation and documentation. Multi-line orders from several brands shipped together with one commercial invoice, packing list, certificates of conformance and country-of-origin statements per line item, HS codes per line, and Incoterms of your choice.
Landed-cost arithmetic
Do the sum before deciding. Landed cost = product price + freight + insurance + destination duty (by HS code and origin) + brokerage + the cost of the time you wait. The last term is usually the decisive one and the one buyers leave out. A $3,000 PLC that arrives in two weeks from Asia at 8 % more than the US list price beats the same PLC at list price with a 24-week lead time if the machine it goes into earns anything at all. We quote landed cost DAP to your site on request so the comparison is on one line.
| Scenario | Typical outcome |
|---|---|
| Japanese/Korean/Taiwanese-made product, US destination | Standard duty by HS code plus any reciprocal tariff for that origin; often lower than the China-origin alternative; stock availability in Asia good |
| German-made product, US destination | Same duty whether bought in the US or via Asia; advantage is availability and speed, not duty |
| China-made product, US destination | Highest duty stack; buying via Vietnam does not change it; consider an alternative origin |
| Any origin, EU destination | EU duty on most automation hardware is 0–2.7 %; the issue is surcharges and allocation, where regional stock helps |
| Any origin, ASEAN destination | ATIGA and FTAs (RCEP, CPTPP, EVFTA) can bring duty to zero with a certificate of origin; we prepare Form D/RCEP certificates where eligible |
Compliance checklist
- Origin on the invoice and the product. We state origin per line and photograph the label. Your broker uses it for the duty calculation; do not accept a supplier who is vague about it.
- Genuine goods. Serial numbers checked against manufacturer databases where available, original packaging, manufacturing date within a sensible window, and a written warranty. See our counterfeit controls.
- Export controls. Standard automation hardware is not controlled, but some items (high-end drives, certain encryption-capable network devices, instruments for specific end uses) can be. We screen end-use and destination and will ask.
- Sanctions and restricted parties. We screen customers and destinations; this is routine and fast.
- Warranty. Products bought through authorised regional channels carry the manufacturer's warranty; some manufacturers restrict warranty service to the region of sale, in which case we state it and provide the warranty through ourselves.
How to run an RFQ with us for a tariff-affected project
Send the bill of material with part numbers, quantities, required date and the destination country. Tell us if origin matters (it does for the US) and whether alternatives are acceptable. We return, within one business day, a quotation per line with origin, HS code, lead time from regional stock, and alternative proposals where they help — and landed cost DAP if you give us the delivery address. Our RFQ guide shows the format that gets the fastest answer.
Need engineering help with this?
Our engineers apply this to real projects every week — selection, specification, commissioning. Send your question or a part number.
Quick answers
Does buying through Vietnam reduce US tariffs on Chinese-made parts?
No. Duty is assessed on country of origin, which is where the part was made, not where it was shipped from. Re-routing to disguise origin is illegal and we do not do it. What changes is availability, lead time and, for products made in Japan, Korea, Taiwan or ASEAN, the applicable duty rate for that origin.
Are products bought in Asia covered by the manufacturer warranty in the US or EU?
Usually yes when bought through authorised channels; a few manufacturers limit service to the region of sale. We state the warranty position per line and provide a HOANTRANTDH warranty where the manufacturer's is limited.
How fast can you ship to the US or Europe?
From regional stock, typically 3–7 days to the destination airport by air freight plus customs clearance. Sea freight for large or heavy items takes 4–6 weeks. We quote both.