The Honeywell 2452R/2450HR/2455R/2452R/2452HR Series is a single-pole, single-throw, snap-acting, non-adjustable thermostat suitable for a wide range of applications including power supplies, general appliances, and medical equipment. It features a temperature-sensitive bimetal disc that actuates normally-closed contacts, opening when the surface or ambient temperature reaches the operating set point. The thermostat is enclosed in a phenolic housing and is known for its rapid response to temperature changes. Various mounting brackets and terminals are available, and the series is UL/CSA approved, meeting EN60730-01 requirements. Potential applications include water heaters, office automation, industrial equipment, and HVAC systems.