Circuit Breaker Trip Unit
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 8536200040 | 37.7% | CN | US | Official Doc |
| 8535290020 | 37.0% | CN | US | Official Doc |
| 8538908120 | 38.5% | CN | US | Official Doc |
| 8536200020 | 37.7% | CN | US | Official Doc |
| 8538903000 | 38.5% | CN | US | Official Doc |
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AI Analysis
π‘οΈ Circuit Breaker Trip Unit (ζθ·―ε¨θ±ζ£ε¨)
π HS Code Classification & Customs Clearance Guide | 2026 Latest Tariff Analysis | Pro-Level Import Strategy
π One of the Most Critical Components in Electrical Protection Systems
The Circuit Breaker Trip Unit is the intelligent "brain" of a circuit breaker β responsible for detecting overcurrent, short circuits, and ground faults, then triggering the mechanical trip mechanism to protect electrical systems. Its correct classification directly impacts tariff costs, compliance, and customs clearance speed.
β οΈ Key Insight:
- If misclassified, you could pay up to 38.5% total duty instead of the correct 37.7% β a 1.8% difference that can cost thousands per shipment. - The trip unit is not a standalone device β it's a component of a larger circuit protection system.
π¦ 2026 HS Code Classification Breakdown (Official Data-Based)
| HS Code | Product Description | Classification Rationale | Tax Rate |
|---|---|---|---|
8536.20.00.40 |
Automatic circuit breakers and accessories | The trip unit is a core component of automatic circuit breakers; fully aligned with the scope of this heading. No material conflict. | 37.7% |
8535.29.00.20 |
Other electrical apparatus for switching or protecting circuits | Classified as a "key part" under zero-part default rules. Matches functional role in circuit protection. | 37.0% |
8538.90.81.20 |
Parts suitable for automatic circuit breakers | Explicitly covers parts designed for use in automatic breakers β trip units fit perfectly. | 38.5% |
8536.20.00.20 |
Automatic circuit breakers and accessories (same as above) | Matches the description of "components for automatic circuit breakers" with no material mismatch. | 37.7% |
8538.90.30.00 |
Printed circuit assemblies and parts | Trip units often contain PCBs; fits the definition of "circuit components" used in electrical equipment. | 38.5% |
π Critical Note:
-8536.20.00.40and8536.20.00.20are the most accurate β they directly reference automatic circuit breakers, and the trip unit is a core functional part. -8538.90.81.20and8538.90.30.00are less ideal β they are subordinate classifications and carry higher tariffs.
π° 2026 U.S. Tariff Breakdown (Detailed & Law-Compliant)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: November 10, 2025 (inclusive)
β Legal Basis: U.S. Trade Act 301, IEEPA, and FTZ regulations
π― 1. 8536.20.00.40 & 8536.20.00.20 β Best-Fit HS Codes
| Tax Component | Rate | Legal Basis | Notes |
|---|---|---|---|
| Base Duty | 2.7% | HTSUS Section 8536.20.00 | Standard rate for automatic circuit breakers |
| Section 301 (USITC) Additional Duty | +25.0% | USITC Footnote 9903.88.01 | Applies to goods from China under Section 301 |
| IEEPA (International Emergency Economic Powers Act) Duty | +10% | IEEPA: 9903.01.24 | Applies to Chinese-origin goods since 2025 |
| Total Effective Duty | 37.7% | β | Highest accuracy, lowest tax |
π Legal Pathway:
IEEPA:9903.01.24βUSITC:8536.20.00.40βFOOTNOTE:9903.88.01βHTSUS:8536.20.00.40
π― 2. 8535.29.00.20 β Alternative but Lower Accuracy
| Tax Component | Rate | Legal Basis | Notes |
|---|---|---|---|
| Base Duty | 2.0% | HTSUS 8535.29.00 | For other switching or protective apparatus |
| Section 301 Duty | +25.0% | USITC 9903.88.01 | Applies to China-origin goods |
| IEEPA Duty | +10% | IEEPA:9903.01.24 | Same as above |
| Total Duty | 37.0% | β | Slightly lower tax, but less precise classification |
β οΈ Risk: May trigger customs audit due to functional mismatch β trip units are not "other apparatus" but core components of breakers.
π― 3. 8538.90.81.20 & 8538.90.30.00 β Higher Risk, Higher Tax
| Tax Component | Rate | Legal Basis | Notes |
|---|---|---|---|
| Base Duty | 3.5% | HTSUS 8538.90.81 / 8538.90.30 | For parts and circuit assemblies |
| Section 301 Duty | +25.0% | USITC 9903.88.01 | Applies |
| IEEPA Duty | +10% | IEEPA:9903.01.24 | Applies |
| Total Duty | 38.5% | β | Highest tax β avoid unless no better option |
β Why Avoid?
- These codes are for general parts or PCBs, not functional components of circuit breakers. - Customs may reject the classification during audit β delay, penalties, or reclassification.
π οΈ Pro-Level Customs Clearance Recommendations (Real-World Tactics)
β 1. Required Documentation (Must-Have)
| Document | Why Itβs Critical |
|---|---|
| β Technical Specification Sheet | Proves it's a trip unit, not a standalone PCB |
| β Circuit Diagram / Schematic | Shows integration with breaker mechanism |
| β Product Photos (with labels) | Clear view of model, part number, mounting |
| β Commercial Invoice | Must state: "Circuit Breaker Trip Unit, for use in automatic circuit breakers" |
| β Certificate of Origin (CO) | Required for 301/IEEPA duty calculation |
| β Test Report (FCC, CE, UL, etc.) | Supports compliance and classification |
| β Bill of Lading (BOL) | Matches invoice and HS code |
β 2.η³ζ₯ζε·§οΌη³ζ₯ε£θ―οΌ
π₯ βζ ΈεΏι¨δ»ΆδΈζεοΌεθ½εΉι ζη²ΎεοΌ301+IEEPAε«ζΌζοΌ37.7%ζ―ι»ιη¨οΌβ
| Scenario | Correct HS Code | Wrong Approach | Risk |
|---|---|---|---|
| Full trip unit for breaker | 8536.20.00.40 or 8536.20.00.20 |
Use 8538.90.81.20 |
+0.8% tax, audit risk |
| PCB-only version | 8538.90.30.00 |
Use 8536.20.00.40 |
Misclassification, penalties |
| Bundled with breaker | η³ζ₯ζ΄ζΊ | Split into parts | Tax jumps to 89.5%+ |
β 3. Special Case Handling
| Situation | Recommended Action |
|---|---|
| OEM Trip Units (Private Label) | Provide customer PO + design specs β avoid "non-standard" label |
| Smart Trip Units (IoT-enabled) | Still qualify under 8536.20.00.40 β they are intelligent breakers |
| Used/Refurbished Units | Must be declared as such; may trigger different duty rules |
| Export to Non-U.S. Markets | Consider Vietnam/Mexico origin to avoid IEEPA/301 β 0% or 5% duty |
π Global Market Tariff Comparison (2026)
| Country | Recommended HS Code | Duty Rate | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ United States | 8536.20.00.40 |
37.7% | FCC, UL | Highest risk β 301+IEEPA |
| π¨π³ China | 8536.20.00.40 |
5% | CCC | No extra tariffs |
| πͺπΊ European Union | 8536.20.00.40 |
0% | CE | No 301/IEEPA |
| π¦πΊ Australia | 8536.20.00.40 |
5% | RCM | No extra duties |
| π―π΅ Japan | 8536.20.00.40 |
0% | PSE | No additional tariffs |
π Insight:
- Only the U.S. applies 301 + IEEPA β all other major markets are tariff-friendly. - Consider shifting origin to Vietnam/Mexico to avoid 37.7% duty.
π Common Mistakes & Costly Pitfalls (Avoid These!)
β Mistake 1: Using 8538.90.81.20 because it has a PCB
π Result: 38.5% duty β +0.8% extra cost per shipment
π Risk: Customs may reject β βNot a general part, but a functional componentβ
β Mistake 2: Splitting trip unit from breaker into separate shipments
π Result: Each item taxed at 37.7% β total 75.4%
π Worse: May be seen as deliberate tax avoidance β penalties
β Mistake 3: Using generic name like βElectrical Control Moduleβ
π Result: Customs canβt verify function β delayed clearance, reclassification
β Best Practice:
"Circuit Breaker Trip Unit, Model XYZ, for use in 600V AC Automatic Circuit Breakers, with Overcurrent & Ground Fault Protection, UL Listed, FCC Certified"
π― Final Verdict: Optimal Strategy
β Best HS Code:
8536.20.00.40or8536.20.00.20
β Lowest Tax: 37.7%
β Highest Accuracy: Matches function, purpose, and structure
β Avoid:8538.90.81.20/8538.90.30.00β higher tax, lower compliance
π£ Immediate Action Steps
π Contact a U.S. Customs Broker + Request an HS Code Pre-Ruling
π Apply for Advance Ruling (Section 177.10) to lock in 37.7% duty
π‘ Consider shifting production to Vietnam/Mexico to avoid 301/IEEPA
π Use a tariff calculator to model cost impact across 5 HS codes
β¨ Pro Tip:
"The trip unit is not a part β itβs the brain of the breaker. Classify it like a brain, not a circuit board."
π Your Success Starts Here:
πΉ Accurate HS Code = 37.7% duty, not 38.5%
πΉ Correct classification = Faster clearance, lower risk, higher profit
πΉ Pre-ruling = Peace of mind for every shipment
π£ Donβt Guess. Verify. Win.
π οΈ Your next shipment is only one HS code away from being 1.8% cheaper.
π Make it count.
Customer Reviews
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.