v3.26.1
Document And Entity Information
3 Months Ended
Mar. 31, 2026
Document Information Line Items  
Entity Central Index Key 0002014254
Document Type 6-K
Document Fiscal Year Focus 2026
Entity File Number 001-42475
Entity Registrant Name FST Corp.
Amendment Flag false
Document Period End Date Mar. 31, 2026
Document Fiscal Period Focus Q1
Current Fiscal Year End Date --12-31