Considering a fusible alloy as a solution really starts with the applications temperature profile. When cooking a turkey (pop-up timer) or supressing a fire (sprinkler systems), its all about the heat and what the fusible alloy does in response to it. Reliability is achieved through ensuring that each alloy is homogenious and not subjected to segregation. Take a look at our list of alloys, and you'll find that there are many options to choose from, many of which are Bismuth containing. These can be manufactured in many shapes and sizes and due to the high volume nature of these applications, the need for tape and reel is almost a given.