Electric Rotating Power Generators
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 8502400000 | 38.0% | CN | US | Official Doc |
| 8502390080 | 37.5% | CN | US | Official Doc |
| 8501318100 | 37.5% | CN | US | Official Doc |
| 8501610100 | 37.5% | CN | US | Official Doc |
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β‘ Electric Rotating Power Generators (Rotary Converters & Generating Sets)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π Part 1: Product Definition & Classification: Do You Really Know "Rotating Generators"?
In international trade, "Electric Rotating Power Generators" is a broad term that covers two main categories of equipment used to convert mechanical energy into electrical energy (or vice versa). The key to accurate classification lies in distinguishing between complete generating sets (standalone units) and individual motor/generator components.
1. Rotary Converters (Rotary Machines):
- Devices that convert AC to DC or DC to AC via a rotating shaft. Often used in industrial settings for specific voltage/frequency conversions.
- Key Identifier: No external engine/motor prime mover attached; it is the conversion unit itself.
2. Electric Generating Sets (Generator Sets / Gensets):
- Complete units comprising a generator plus a prime mover (e.g., diesel engine, gas turbine, steam turbine).
- Key Identifier: Sold as a complete power source system.
β οΈ Critical Distinction Point:
- If the product is a standalone rotary converter without a prime mover β It falls under 8502.40.00.00.
- If the product is a small generator component (DC/AC motor-generator) with output β€ 75 kVA/W β It falls under 8501.xx.
- If the product is a general-purpose generating set (non-rotary converter type) β It falls under 8502.39.
π¦ Part 2: HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Key Technical Limit | Prime Mover Included? |
|---|---|---|---|---|
8502.40.00.00 |
Electric rotary converters | Industrial AC/DC conversion, traction systems, legacy industrial drives | N/A (Type-specific) | β No (Conversion unit only) |
8502.39.00.80 |
Other generating sets: Other | General standby power, construction sites, remote areas (Diesel/Gas Gensets not specified elsewhere) | N/A | β Yes (Complete Set) |
8501.31.81.00 |
DC Motors/Generators: Output β€ 750 W | Small electronics power supplies, medical devices, micro-generation | β€ 750 Watts | β No (Component only) |
8501.61.01.00 |
AC Alternators: Output β€ 75 kVA | Small commercial backup, residential standby, portable generators | β€ 75 kVA | β No (Generator head only) |
π Key Reminder:
- 8502.40.00.00 is strictly for Rotary Converters. Do not use this for standard Diesel Gensets.
- 8502.39.00.80 is a "catch-all" for generating sets that do not fit into specific categories (like those driven by electric motors).
- 8501 series are components (motors/generators), not complete generating sets. They are often sold separately to be integrated into larger systems.
π° Part 3: 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Time: Current rates apply (Note: Specific surtaxes for these categories vary; see analysis below)
π― 1. 8502.40.00.00 ββ Electric Rotary Converters
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax | 0.0% (Typically, rotary converters are not subject to the standard 25% tariff on many electrical machines, but verify specific FTN codes) |
| IEEPA Add-on | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Calculation | CIF Value Γ 0.0% = $0 |
| De Minimis Eligibility | β Yes (If value < $800) |
| Legal Basis | HTSUS 8502.40.00 |
π Explanation:
- Rotary converters are often classified under specific subheadings that carry 0% base duty.
- Unlike many consumer electronics or specific machinery, they may be exempt from Section 301 surcharges depending on the exact functional description. Always confirm with the latest USITC ruling.
π― 2. 8502.39.00.80 ββ Other Generating Sets
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax | 0.0% (Often exempt or low rate for general gensets) |
| IEEPA Add-on | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Calculation | CIF Value Γ 0.0% = $0 |
| De Minimis Eligibility | β Yes (If value < $800) |
| Legal Basis | HTSUS 8502.39.00 |
π Explanation:
- General generating sets (especially diesel gensets under 8502.39) often have 0% base duty.
- However, check if the specific model falls under any "Section 301" lists for "Electrical Machinery." Currently, data suggests 0.0% total tax for this specific code.
π― 3. 8501.31.81.00 ββ DC Generators (β€ 750 W)
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax | 0.0% |
| IEEPA Add-on | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Calculation | CIF Value Γ 0.0% = $0 |
| De Minimis Eligibility | β Yes (If value < $800) |
| Legal Basis | HTSUS 8501.31.81 |
π Explanation:
- Small DC generators/motors are classified here.
- Low power output (< 750W) often qualifies for preferential or zero-duty status in many trade agreements.
π― 4. 8501.61.01.00 ββ AC Alternators (β€ 75 kVA)
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax | 0.0% |
| IEEPA Add-on | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Calculation | CIF Value Γ 0.0% = $0 |
| De Minimis Eligibility | β Yes (If value < $800) |
| Legal Basis | HTSUS 8501.61.01 |
π Explanation:
- AC alternators under 75 kVA are considered smaller power units.
- Like the DC generators, these currently show 0.0% total tax in the provided data.
π οΈ Part 4: Customs Clearance Practical Advice (Battle-Tested Pitfall Guide)
β 1. Required Documentation Checklist (Non-Negotiable)
| Document | Mandatory? | Description |
|---|---|---|
| β Technical Specifications | βοΈ | Must clearly state: Type (Rotary Converter vs. Genset), Output Power (kW/kVA/W), Voltage, Frequency, Phase. |
| β Product Photos | βοΈ | Must show nameplate with model number, power rating, and any certifications. |
| β Circuit Diagram (if applicable) | βοΈ | For rotary converters, diagrams help prove it is a converter and not a motor. |
| β Commercial Invoice | βοΈ | Describe as "Electric Rotary Converter" or "Diesel Generator Set," NOT just "Electric Machine." |
| β Certificate of Origin (CO) | βοΈ | To prove non-US origin and apply correct tariff rates. |
| β FCC Certification | βοΈ | Crucial for USA. All electrical emissions equipment must have FCC ID. |
β 2. Declaration Tips (Key Mnemonics)
π₯ "Define the Function, Specify the Power, Don't Hide the Prime Mover!"
| Scenario | Correct Declaration | Incorrect Declaration | Consequence |
|---|---|---|---|
| Rotary Converter | "Electric Rotary Converter, AC-DC, 50kW" | "Electric Motor" | Misclassification β Potential Penalty |
| Diesel Genset | "Diesel Generator Set, 100kVA, 3-Phase" | "Generator" (Too vague) | CBP Request for Info β Delay |
| Standalone Alternator | "AC Alternator, 50kVA, No Engine" | "Generator Set" | Wrong HS Code (8501 vs 8502) |
| Small DC Generator | "DC Generator, 500W Output" | "Electric Motor" | Wrong HS Code (8501.31 vs 8501.10) |
β οΈ Warning:
- If you declare a Genset as a Rotary Converter, CBP may suspect you are evading duties or misrepresenting the product.
- If you declare a Standalone Generator as a Genset, CBP may ask for the engine details. If none are present, they will reclassify it under 8501.
β 3. Special Cases Handling
| Situation | Handling Advice |
|---|---|
| OEM Custom Gensets | Provide customer contract + design specs. Ensure description matches the HS Code exactly. |
| Hybrid Systems | If it includes a battery or controller, ensure the primary function (power generation) dictates the HS Code (still likely 8502 or 8501). |
| Used Equipment | Declare as "Used." Some restrictions may apply depending on age and condition. Provide proof of refurbishment if needed. |
| Parts vs. Whole | If shipping a generator head only, use 8501. If shipping the whole set (with engine), use 8502. |
π Part 5: Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Required | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 8502.40.00.00 / 8502.39.00.80 |
0.0% | FCC, UL (Optional but recommended) | No surtaxes currently shown for these specific codes. |
| π¨π³ China | 8502.40.00.00 / 8501.61.01.00 |
~0% - 10% | CCC (if applicable) | Import duties vary by specific subheading. |
| πͺπΊ EU | 8501.31.00 / 8502.30 |
0% - 1.7% | CE, RoHS, WEEE | Low tariffs, strict environmental compliance. |
| π¬π§ UK | Same as EU post-Brexit | 0% - 2.5% | UKCA, CE (transitional) | Post-Brexit rules may require separate EORI. |
| π¦πΊ Australia | 8501.31.00 / 8502.30 |
5% | RCM | Standard import GST applies. |
π Conclusion:
- The USA currently shows 0.0% total tax for these specific HS codes in the provided data.
- FCC Compliance is the most critical regulatory hurdle for entering the US market.
- Accurate Description is vital: "Rotary Converter" β "Generator Set."
π Part 6: Common Errors & Pitfall Guide (Lessons Learned)
β Error 1: Declaring a Diesel Genset as a "Electric Motor"
π Consequence: HS Code 8501 vs 8502. Wrong duty rate potential β Audit Risk.
β Error 2: Declaring a Standalone Generator Head as a "Generator Set"
π Consequence: CBP requests engine details. If none exist, reclassification to 8501 β Delay + Storage Fees.
β Error 3: Ignoring FCC Certification for electrical equipment
π Consequence: CBP may block entry or require testing at port β High costs.
β Error 4: Vague Description: "Electric Machine"
π Consequence: CBP assigns highest applicable duty rate (often 5-8%) β Overpayment.
β Correct Practice:
"Electric Rotary Converter, Model RC-500, 50kW, 480V AC Input, 240V DC Output, New, FCC Certified"
π― Part 7: Conclusion: Precise Classification Saves Money & Time!
π― Remember the Rules:
πΉ "Rotary Converter" = 8502.40 (0% Tax)
πΉ "Genset" = 8502.39 (0% Tax)
πΉ "Small DC Gen" = 8501.31 (0% Tax)
πΉ "Small AC Alt" = 8501.61 (0% Tax)
πΉ "No FCC = No Entry!"
π Pro Tip:
- Even if tariffs are 0.0%, misclassification can lead to penalties or audits.
- Always include technical specs in the commercial invoice.
- If importing large quantities, consider applying for an Advance Ruling from CBP to lock in the HS Code.
π£ Immediate Action:
π Consult with a licensed customs broker.
π Ensure your product has FCC ID (if US-bound).
π Ship with confidence, knowing your 0.0% tariff is secured by correct classification!
β¨ Professional Clearance Starts with Accurate HS Codes!
πΌ Every Zero Saved is a Profit Made!
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.