ECCN
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3A904
3A904 Cryogenic cooling systems and components, as follows (see List of Items Controlled).
- Category
- Category 3—Electronics
- Product group
- A. “End Items,” “Equipment,” “Accessories,” “Attachments,” “Parts,” “Components,” and “Systems”
Reason for Control
- NS
- RS
- AT
Official text
License Requirements
Reason for Control:
NS, RS, AT
Control(s) Country chart (see Supp. No. 1 to part 738)
- NS applies to entire entry Worldwide control. See § 742.4(a)(5) and (b)(10) of the EAR.
- RS applies to the entire entry Worldwide control. See § 742.6(a)(10) and (b)(11) of the EAR.
- AT applies to entire entry AT Column 1.
List Based License Exceptions (See Part 740 for a Description of All License Exceptions)
LVS: N/A
GBS: N/A
IEC: Yes, see § 740.2(a)(22) and § 740.24 of the EAR.
Special Conditions for STA
STA: License Exception STA may not be used to ship any item in this ECCN to any of the destinations listed in Country Group A:5 or A:6 (See Supplement No. 1 to part 740 of the EAR).
List of Items Controlled
Related Controls: See ECCN 3E901 for related technology controls for the “development” or “production” of this ECCN.
Related Definitions: N/A
Items:
a. Systems rated to provide a cooling power greater than or equal to 600 µW at or below a temperature of 0.1 K (−273.05 °C) for a period of greater than 48 hours;
b. Two-stage pulse tube cryocoolers rated to maintain a temperature below 4 K (−269.15 °C) and provide a cooling power greater than or equal to 1.5 W at or below a temperature of 4.2 K (−268.95 °C).
ecfr-15cfr774-supp1-2026-08-28 · effective 2026-08-28
Issue date 2026-08-28. Amendment date 2026-08-28.
- eCFR Commerce Control List (15 CFR 774, Supplement No. 1)www.ecfr.gov
- eCFR versioner XML captured at ingestwww.ecfr.gov
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