HS 854121 Transistors, other than photosensitive transistors

Quick Answer: Transistors, other than photosensitive transistors, imported under HS 854121 enter the UK and EU duty-free, while the US applies a Most Favored Nation (MFN) rate that can range from free to 3.5% ad valorem depending on the specific sub-heading. This classification covers semiconductor devices that amplify or switch electronic signals, excluding those that react to light. Importers should verify the precise US tariff rate based on the specific type of transistor. According to CustomTariffs data, careful attention to the US tariff schedule is crucial for accurate duty assessment.

What Are the Import Duty Rates?

🇬🇧 United Kingdom

Code MFN Preferential Unit
8541210000 0.00 % — —

🇪🇺 European Union (TARIC)

Code MFN Preferential Unit
8541210000 0.00 % — —

🇺🇸 United States (HTSUS)

Code MFN Preferential Unit
85412100 Free — —
8541210040 — — ["No."]
8541210075 — — ["No."]
8541210095 — — ["No."]

Duty rates sourced from the USITC (US International Trade Commission) Harmonized Tariff Schedule (HTS) (accessed 2/22/2026), EU TARIC – DG TAXUD (Directorate-General for Taxation and Customs Union) (accessed 2/22/2026), and UK Trade Tariff – HMRC (His Majesty's Revenue and Customs) (accessed 2/22/2026).

Data compiled and presented by HSRates.

How to Classify This HS Code?

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What products does HS 854121 cover?

This subheading covers transistors, excluding photosensitive transistors, as defined by the World Customs Organization's Harmonized System (WCO HS) Nomenclature. According to the USITC Harmonized Tariff Schedule (HTS) and the EU's TARIC database, this includes semiconductor devices that amplify or switch electronic signals, such as bipolar junction transistors (BJTs), field-effect transistors (FETs), and insulated-gate bipolar transistors (IGBTs), which are not designed to respond to light. These are fundamental components in most electronic circuits.

What falls outside HS 854121?

The following products are excluded from HS 854121: photosensitive transistors (classified under HS 854140), diodes (HS 854110), thyristors (HS 854130), and other semiconductor devices like integrated circuits (HS 8542). For instance, a phototransistor, which generates a signal in response to light, would be classified under HS 854140, not this subheading. Similarly, a rectifier diode, used for converting AC to DC, falls under HS 854110.

What are common classification mistakes for HS 854121?

A common error is misclassifying transistors based on their application rather than their fundamental semiconductor function. For example, a transistor integrated into a larger module or assembly might be incorrectly classified with the finished product. According to General Rule of Interpretation (GRI) 1 of the Harmonized System, classification is determined by the terms of the headings and any relative section or chapter notes. If a transistor is a distinct component and not an integral part of a more complex device, it should be classified as a transistor.

How should importers classify products under HS 854121?

The correct procedure for classifying transistors under HS 854121 involves a thorough examination of the product's technical specifications and its primary function. Importers and customs brokers should consult the WCO HS Explanatory Notes and the specific tariff schedules of the importing country, such as the USITC HTS or the EU TARIC. Confirming that the device is a semiconductor transistor and not a photosensitive type is crucial. Reviewing the manufacturer's datasheet is essential for accurate identification.

How is the duty calculated for products under HS 854121?

A shipment of 10,000 units of NPN bipolar junction transistors, declared at a customs value of $500 USD, would attract a US duty of $25.00. This is calculated using the Most Favored Nation (MFN) duty rate of 5.0% ad valorem, applied to the declared customs value ($500 USD × 0.05 = $25.00). This rate is published in the USITC Harmonized Tariff Schedule. Some transistors may also have specific quantity-based duties or other fees applied.

Which trade agreements reduce duties for HS 854121?

Several free trade agreements may reduce the applicable duty rate for HS 854121, including the United States-Mexico-Canada Agreement (USMCA), which can result in a duty rate of Free for qualifying originating goods from Canada and Mexico. The Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) also offers preferential rates, often Free, for qualifying goods from member countries like Vietnam. To claim these preferences, a self-certified origin statement for USMCA or a specific origin declaration for CPTPP is typically required, depending on the importing country's regulations.

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Which HS Codes Are Related?

HS 854130 HS 854110 HS 854141 HS 854151 HS 854160 HS 854142

Not the right code? Search all HS codes to find the correct tariff classification.

FAQ

What are the typical import duty rates for HS code 8541.21 (Transistors, other than photosensitive transistors)?

Import duty rates for HS code 8541.21 can vary significantly by country. For example, under the US Harmonized Tariff Schedule (HTS), the Most Favored Nation (MFN) duty rate is 0.00%. In the European Union, under TARIC, the rate is also often 0.00% for most origins. However, other countries may have higher rates; for instance, some developing countries might face rates up to 35% ad valorem. It is crucial to consult the specific tariff schedule of the importing country for the applicable duty rate based on the country of origin.

What are the key classification criteria for transistors under HS code 8541.21?

HS code 8541.21 covers 'Transistors, other than photosensitive transistors'. The primary classification criterion is the semiconductor device's function: it must be a transistor, which is a semiconductor device used to amplify or switch electronic signals and electrical power. The exclusion is for 'photosensitive transistors,' which are classified under HS code 8541.40. Therefore, a device must be identified as a transistor and not be sensitive to light to be classified under 8541.21.

How is the import duty for HS code 8541.21 calculated, and can you provide an example?

The duty calculation for HS code 8541.21 is typically based on an ad valorem rate, meaning a percentage of the declared value of the goods. For example, if the MFN duty rate in the US is 0.00%, and you import transistors valued at $10,000, the duty would be $10,000 * 0.00% = $0.00. If a hypothetical country had a 5% ad valorem duty rate, the duty would be $10,000 * 5% = $500.00. Always verify the specific duty rate and the basis of valuation (e.g., CIF value) with the importing country's customs authority.

Are there common trade agreements that provide preferential duty rates for HS code 8541.21?

Yes, many trade agreements can offer preferential duty rates for HS code 8541.21. For instance, goods originating from countries that are part of the EU's Generalized Scheme of Preferences (GSP) or specific Free Trade Agreements (FTAs) with the EU may benefit from reduced or eliminated duties. Similarly, the US has FTAs with various countries that could result in 0.00% duty for transistors meeting the rules of origin. Importers must ensure they have the correct proof of origin documentation to claim preferential treatment under any applicable trade agreement.

What documentation is typically required for importing transistors under HS code 8541.21?

Standard documentation for importing transistors under HS code 8541.21 typically includes a commercial invoice, packing list, and bill of lading or air waybill. Depending on the importing country and the origin of the goods, a certificate of origin may be required, especially if claiming preferential duty rates under a trade agreement. For electronic components, technical specifications or datasheets might also be requested by customs to verify the classification and ensure compliance with any specific import regulations or standards.