Cheap And Discounts 30pcs 100% orginal new HCNW3120 HCNW-3120 optocoupler patch SOP8 opto-isolator optocoupler Wholesale. Buy Directly From Merchant Gentioncoltd Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.