Chimicron is an independent distributor of electronic components. We have reliable sources of electronic components, only sell new & original products and offer 1 year warranty for our products. Buy the STK554U394A-E Rochester Electronics at chimicron.com. We have 2000 pieces of STK554U394A-E in stock available now. Submit an inquiry for STK554U394A-E or send an email to [email protected], we will contact you in 24 hours.