Caterpillar SR4B 2500 kVA Diesel Generator Alternator
The Caterpillar SR4B is a brushless AC generator alternator rated at 2500 kVA, designed for heavy-duty diesel generator sets used in industrial power backup systems. It falls under HTS 8501.64.0125 because it is an AC generator (alternator) with output exceeding 750 kVA but not exceeding 10,000 kVA, specifically for synchronous operation in prime and standby power applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If output exceeds 10,000 kVA
Larger capacity alternators shift to the next subheading for outputs over 10,000 kVA within the same AC generator category.
If imported as complete generating set with engine
When assembled with a diesel engine and fuel system, it becomes a generating set under heading 8502 rather than separate alternator.
If parts like rotor or stator only, not complete unit
Individual components or incomplete assemblies of generators are classified under 8503 as parts, not finished AC generators.
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Import Tips & Compliance
• Confirm exact kVA rating via nameplate and test certificates to ensure classification within 8501.64.0125 (750-10,000 kVA range)
• Provide manufacturer specs showing synchronous AC generator design, excluding photovoltaic types; include CE/UL markings for customs clearance
• Avoid misclassification as complete generating sets (8502) by importing alternator separately from engine; declare as 'other AC generators'
Related Products under HTS 8501.64.01.25
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Cummins PI734A is a 2000 kVA brushless, self-excited AC alternator for standby and prime power generator applications in commercial facilities. Classified under HTS 8501.64.0125 as an AC generator exceeding 750 kVA but not over 10,000 kVA, optimized for low harmonic distortion.
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