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 TLHR4400 Vishay / Semiconductor - Opto Division at chimicron.com. We have 1890 pieces of TLHR4400 in stock available now. Submit an inquiry for TLHR4400 or send an email to [email protected], we will contact you in 24 hours.