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Document And Entity Information
 12 Months Ended
Dec. 31, 2024
Document Information Line Items  
Entity Central Index Key 0002014254
Amendment Description AMENDMENT NO. 2
Document Type F-1/A
Entity Registrant Name FST Corp.
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One No. 3, Gongye 1st Rd
Entity Address, Address Line Two Minxiong Township
Entity Address, City or Town Chiayi County
Entity Address, Postal Zip Code 621018
Entity Address, Country TW
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag true
Business Contact  
Document Information Line Items  
Entity Address, Address Line One No. 3, Gongye 1st Rd
Entity Address, Address Line Two Minxiong Township
Entity Address, City or Town Chiayi County
Entity Address, Postal Zip Code 621018
Entity Address, Country TW
City Area Code +886
Local Phone Number 5221-2555