Conform to UL Safety Standards Dielectric Strength: 2500Vrms Temperature Class: B(130℃) Various Input Options: 100/110/115/120/220/230/240/480V,50/60HZ Single and dual or More Secondary Power Range: 1.1VA to 600VA Lamination Size Range: EI28 to EI133 Assemble Style : PCB and Foot Mounting or Others According to Customers' needs