[COMPREHENSIVE for PROTECTION] This 5pcs set of thermal protectors s optimal safety for various applications, including fluorescent lamp ballasts, transformers, and daily electrical appliances. [RELIABLE DURABILITY] Designed to withstand up to 10,000 cycles at rated current, these thermal switches offer long-lasting performance for all your heating needs. [EFFICIENT DESIGN] Featuring a normally closed contact state that opens when the temperature rises, they provide automatic reset functionality for seamless operation. [SIZING REMINDER] Please check your own sizing specifications to compatibility with your devices.