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All colleagues unite and focus their efforts to write a new chapter of developmentDifferences between Chinese and U.S. power adapters
所属分类： FAQ
发布时间：2025-04-23
The Chinese standard (CN) and U.S. standard (US) power adapters differ primarily in plug design, voltage and current ratings, and certification requirements. Below is a detailed comparison:
1. Plug shape
Chinese-standard plug: Typically a two‑prong flat‑type or an eight‑shaped three‑prong plug (with grounding), compliant with the Chinese national standard (GB).
U.S.-style plug: Typically a two‑prong flat‑blade type (without grounding) or a three‑prong configuration with one round and two flat blades (including grounding), compliant with the U.S. National Electrical Manufacturers Association (NEMA) standard.
2. Voltage and Current Specifications
China-standard power adapter ：
Input voltage: 100–240 V AC (wide-voltage design, compatible with most regions worldwide).
Output voltage: Common options include 5V, 9V, 12V, 15V, and 20V, suitable for devices such as smartphones and laptops.
Current: Depending on the device’s requirements, such as 2 A, 3 A, 5 A, etc.
US‑spec power adapter:
Input voltage: Typically 100–120 V AC (U.S. standard voltage).
Output voltage and current: Similar to the standard model, but must comply with energy efficiency standards such as the U.S. Energy Star.
3. Certification Standards
China regulations: Must obtain CCC certification (China Compulsory Certification) to ensure compliance with Chinese safety and electromagnetic compatibility standards.
U.S. regulations: UL certification (Underwriters Laboratories) or FCC certification (Federal Communications Commission) is required to ensure compliance with U.S. safety and electromagnetic compatibility standards.