03420012H is a thermal fuse manufactured by Littelfuse, Inc. It has a rated current of 12A, a voltage rating of 250VAC, a temperature rating of 160°C (320°F), and an interrupt rating of 10A. This thermal fuse is UL and CSA approved, and it meets all RoHS requirements. It is encapsulated in a UL 94V-0 rated plastic case, and has an operating temperature range from -40°C to +160°C. This thermal fuse is suitable for a variety of applications, including motor and HVAC controllers, computers, air conditioners, and other electrical and electronic equipment.