Caterpillar SR4B 2500 kVA Diesel Generator Alternator from Japan
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.
Duty Rate — Japan → United States
Rate breakdown
Import Tips
• 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'