power transformer
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 8504320000 | 37.4% | CN | US | Official Doc |
| 8504316000 | 36.6% | CN | US | Official Doc |
| 8504220040 | 35.0% | CN | US | Official Doc |
| 8504314035 | 41.6% | CN | US | Official Doc |
| 8504909642 | 35.0% | CN | US | Official Doc |
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AI Analysis
β‘ Power Transformers (Industrial & Electrical Equipment)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: Do You Truly Understand "Power Transformers"?
In international trade, Power Transformers are critical components for voltage conversion in electrical transmission and distribution systems. They are broadly categorized based on their application, power rating, and structural composition:
- Core/Shell Type Power Transformers: Used for high-voltage transmission (e.g., 8504.22).
- Distribution Transformers: Used for local distribution (e.g., 8504.31, 8504.32).
- Electronic/Lighting Transformers: Low-power, often used for lighting or electronics (e.g., 8504.31.40).
- Parts & Accessories: Independent components like cores, windings, or bushings (e.g., 8504.90).
β οΈ Key Distinction Point:
- If the device is designed for high-voltage grid transmission β Likely 8504.22.
- If it is for general voltage regulation (industrial/commercial) β Likely 8504.31 or 8504.32.
- If it is for lighting circuits (low voltage) β Likely 8504.31.40.
- If it is a spare part (not a complete functional unit) β Likely 8504.90.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Key Characteristic |
|---|---|---|---|
8504.22.00.40 |
Distribution Transformers | Power grids, substations | High power, grid-connected |
8504.32.00.00 |
Other Transformers | General industrial use | Not elsewhere specified |
8504.31.60.00 |
Other Transformers | Specific electronic/industrial | No material/form conflict |
8504.31.40.35 |
Lighting Transformers | Lighting circuits | Low power, specific application |
8504.90.96.42 |
Transformer Parts | Maintenance/Assembly | Components only, no full function |
π Critical Reminder:
- Complete Units: Must be classified as8504.22,8504.31, or8504.32. Do not ship complete transformers as "parts." - Parts Only: If shipping cores, windings, or tanks separately, use8504.90.96.42. Misdeclaring parts as full transformers may lead to valuation errors or customs delays.
π° III. 2026 Latest Tariff Rate Details (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: From November 10, 2025 (including subsequent imports)
π― 1. 8504.22.00.40 ββ Distribution Transformers (Power Grid Category)
| Item | Content |
|---|---|
| Basic Tariff | 0.0% (ad valorem) |
| USITC Surtax | +25.0% (under Section 301) |
| IEEPA Surtax | +10.0% (ιε―ΉδΈε½δΊ§ε, effective from 2025.11.10) |
| Total Tariff | 35.0% |
| Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not Applicable |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:8504.22.00.40 β FOOTNOTE:9903.88.01 |
π Explanation:
- Although the base tariff is 0%, the 25% Section 301 duty + 10% IEEPA duty results in a total of 35%. - This is one of the lower total rates among power transformers due to the 0% base rate, but still significant.
π― 2. 8504.32.00.00 ββ Other Transformers (General Industrial)
| Item | Content |
|---|---|
| Basic Tariff | 2.4% (ad valorem) |
| USITC Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tariff | 37.4% |
| Calculation | CIF Value Γ 37.4% |
| De Minimis Exemption | β Not Applicable |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:8504.32.00.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- The 2.4% base tariff pushes the total rate higher than8504.22. - Commonly used for general-purpose transformers not classified as lighting or specific distribution units.
π― 3. 8504.31.60.00 ββ Other Transformers (Specific Category)
| Item | Content |
|---|---|
| Basic Tariff | 1.6% (ad valorem) |
| USITC Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tariff | 36.6% |
| Calculation | CIF Value Γ 36.6% |
| De Minimis Exemption | β Not Applicable |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:8504.31.60.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- Slightly lower than8504.32.00.00due to a 1.6% base rate. - Used for transformers that fit "other" categories without material/form conflicts.
π― 4. 8504.31.40.35 ββ Lighting Transformers (Low Power)
| Item | Content |
|---|---|
| Basic Tariff | 6.6% (ad valorem) |
| USITC Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tariff | 41.6% |
| Calculation | CIF Value Γ 41.6% |
| De Minimis Exemption | β Not Applicable |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:8504.31.40.35 β FOOTNOTE:9903.88.01 |
π Explanation:
- The highest base rate (6.6%) leads to the highest total tariff (41.6%). - Only applicable to transformers specifically designed for lighting applications. Misclassification here can lead to severe penalties.
π― 5. 8504.90.96.42 ββ Transformer Parts & Accessories
| Item | Content |
|---|---|
| Basic Tariff | 0.0% (ad valorem) |
| USITC Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tariff | 35.0% |
| Calculation | CIF Value Γ 35.0% |
| De Minimis Exemption | β Not Applicable |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:8504.90.96.42 β FOOTNOTE:9903.88.01 |
π Explanation:
- Same total rate as8504.22(35.0%) due to 0% base rate. - Applies only to non-complete parts (e.g., cores, windings, tanks). Do not ship complete units under this code.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance)
β 1. Preparation Checklist (All Documents Required)
| Document | Required | Description |
|---|---|---|
| β Technical Specification Sheet | βοΈ | Includes voltage, power rating, frequency, dimensions |
| β Circuit/Structural Diagram | βοΈ | To prove if itβs a complete unit or a part |
| β Product Photos (with Nameplate) | βοΈ | Clear view of model, brand, input/output parameters |
| β Third-Party Test Reports | βοΈ | IEEE, IEC, CE, or UL certifications (if applicable) |
| β Commercial Invoice | βοΈ | Clearly state "Power Transformer" or "Transformer Parts" |
| β Certificate of Origin (CO) | βοΈ | If non-China origin, for potential preferential treatment |
| β Packing List | βοΈ | Detail relationship between units and parts |
β 2. Declaration Tips (Key Mnemonics)
π₯ βComplete Unit β Parts; Code Defines Rate; Accuracy Saves Millions!β
| Scenario | Correct Declaration | Error Consequence |
|---|---|---|
| Complete Power Transformer | 8504.22.00.40 or 8504.32.00.00 |
Misdeclare as parts β Valuation dispute |
| Lighting Transformer | 8504.31.40.35 |
Misdeclare as general transformer β 41.6% vs 35-37% |
| Transformer Parts Only | 8504.90.96.42 |
Misdeclare as complete unit β Potential fraud penalty |
| Mixed Package (Unit + Parts) | Declare Separately | Combine into one β Complex valuation, delays |
β 3. Special Cases Handling
| Scenario | Handling Advice |
|---|---|
| OEM Custom Transformers | Provide client orders + design specs to avoid "standard" misclassification |
| Transformers for Medical Use | If for specific medical equipment, may qualify for different classification, but requires proof |
| Transformers for Military/Aerospace | Can apply for "special purpose" declaration, potentially affecting audit risk |
| Parts Shipped in Separate Packages | Ensure each package is clearly marked as "Parts" not "Transformer" |
π V. Global Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Required | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 8504.22.00.40 / 8504.32.00.00 |
35.0% - 37.4% | IEEE/UL | High surtaxes apply |
| π¨π³ China | 8504.22.00.40 / 8504.32.00.00 |
~0-5% | CCC | No surtaxes |
| πͺπΊ EU | 8504.22.00.40 / 8504.32.00.00 |
0-2.7% | CE + RoHS | No surtaxes |
| π¬π§ UK | 8504.22.00.40 / 8504.32.00.00 |
0-3.0% | UKCA | Post-Brexit rules apply |
| π―π΅ Japan | 8504.22.00.40 / 8504.32.00.00 |
0-2.0% | PSE | No surtaxes |
π Conclusion:
- The US is the only major market imposing high surtaxes (35%+) on Chinese-origin transformers. - EU, UK, Japan, and China have significantly lower tariffs, making them more cost-effective markets for these products.
π VI. Common Errors & Pitfall Guide (Lessons Learned)
β Error 1: Shipping complete transformers as "Parts"
π Consequence: Customs may reclassify to full transformer rates (similar total, but compliance issues) or charge fraud penalties.
β Error 2: Misclassifying Lighting Transformers as General Transformers
π Consequence: Rate difference between 41.6% and 35-37% β Overpayment or Underpayment penalties.
β Error 3: Not Providing Technical Specs
π Consequence: Customs cannot determine if itβs a power or lighting transformer β Delays or Retention.
β Error 4: Combining Units and Parts in One Declaration
π Consequence: Valuation complexity, potential audit triggers β Clearance delays.
β Correct Practice:
"Power Transformer, 500kVA, 11kV/415V, Oil-Immersed, Model XYZ, IEEE Certified, HS Code 8504.22.00.40"
π― VII. Conclusion: Precision Classification, Cost Optimization!
π― Remember the Mnemonics:
πΉ "Complete vs. Parts: Code Matters!"
πΉ "Lighting is Expensive: 41.6%!"
πΉ "Distribution is Cheaper: 35.0%!"
πΉ "US Market: Surcharge Heavy: 35-41%!"
π Pro Tip:
If your transformers are originating from Vietnam, Mexico, Thailand, or Malaysia, you may apply for IEEPA Exemption, reducing tariffs to 0-5%.
Recommend Advance Ruling (Pre-classification) to avoid clearance risks.
π£ Take Action Now:
π Contact a Professional Customs Broker + Provide Product Specs + Apply for HS Code Advance Ruling
π Ensure Smooth Clearance, Efficient Export, and Maximized Profit!
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every Cent of Your Cost Deserves Precise Calculation!
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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.