The WMF21-5D5MGUP6BB3.5 NTC Thermistor Through Hole RoHS component is manufactured by the Tyohm company. It is an electronically controlled device that acts as a temperature sensor composed of two dissimilar conductive materials, usually a metal and a semi-conductor, in a temperature compensating enclosure. Once the temperature rises, the resistance value decreases, creating a voltage potential across the thermistor. As the temperature drops, the resistance rises until the desired temperature is reached. This thermistor is designed with RoHS (Restriction of Hazardous Substances) compliance, meaning that it does not contain any hazardous materials such as lead or mercury, and therefore is ideal for environmentally friendly applications. Additionally, this component has a through-hole design, meaning that it can be mounted onto the circuit board via specially designed holes in the board, making it ideal for applications where tight spaces are present.