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NY 896544

April 7, 1994

CLA-2-84:S:N:N1:110 896544


TARIFF NO.: 8471.99.3200

Mr. Raul J. Roch
JMR Cargo Express
10053 International Road
Suite #22
Los Angeles, CA 90045

RE: The tariff classification of DC-DC Converters (Power Supplies) from Macau.

Dear Mr. Roch:

In your letter dated March 23, 1994, on behalf of PCA Electronics, Inc., you requested a tariff classification ruling.

The merchandise under consideration involves DC/DC converters that are designed for use with digital processing units. Most of the models, such as the EPC1002PS, and EPC1053, are mounted on a PC board with other parts that make up a completed network interface board. The input voltage of the these power supplies ranges from 3.5 Volts to 40 Volts DC, and the output voltage is normally 9 Vdc suitable for all coaxial transceiver chips.

These DC/DC converters (power supplies) do supply continuously under the control of the ADP system to which they belong, the appropriate power level in response to the requirements of the units making up the ADP system. These units also have the ability to provide for current overload protection and over-current protection by a feed-back circuit that senses output conditions and adjusts the input current appropriately. Energy storage is provided by the output filtering capacitors and associated circuitry. Noting HQ Ruling 953463, these DC/DC converters appear comparable in use and function to those described in that ruling.

These DC/DC converters appear to meet the definition of a power supply as outlined in the Explanatory Notes to the HTS under 84.71, and meets the definition of a "unit" of an ADP system, as outlined in Legal Note 5 (B) to Chapter 84 of HTS. Since these units are normally mounted inside of the processor unit, they would thus be units suitable for physical incorporation into ADP machines or units thereof.

The applicable subheading for the DC/DC converters will be 8471.99.3200, Harmonized Tariff Schedule of the United States (HTS), which provides for power supplies, suitable for physical incorporation into automatic data processing machines or units thereof. The rate of duty will be free.

This ruling is being issued under the provisions of Section 177 of the Customs Regulations (19 C.F.R. 177).

A copy of this ruling letter should be attached to the entry documents filed at the time this merchandise is imported. If the documents have been filed without a copy, this ruling should be brought to the attention of the Customs officer handling the transaction.


Jean F. Maguire
Area Director

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