TE Connectivity GA2.2K3A1IA NTC Thermistor 2.252 kΩ at 25°C, 3976 K Beta, Epoxy Bead, PTFE Leads, ±0.1 °C Accuracy

The GA2.2K3A1IA has a Beta constant (B25/85) of 3976K. This value defines the shape of the resistance-temperature curve between 25°C and 85°C. A higher, stable Beta value like 3976K indicates a more predictable and consistent temperature-resistance relationship, which is crucial for accurate temperature calculation and sensor interchangeability in precision applications.

This is a passive resistive sensor. You typically connect it in a voltage divider circuit with a known precision resistor. Connect one thermistor lead to your microcontroller's analog input pin and the other to ground, with the precision resistor between the pin and the supply voltage (e.g., 3.3V or 5V). The analog reading corresponds to the voltage at the divider, which you then convert to resistance and finally to temperature using the Steinhart-Hart equation or a lookup table based on the thermistor's Beta value.

The PTFE (Teflon) insulation provides excellent chemical resistance, high-temperature stability, and prevents lead oxidation, ensuring reliable solder joints over time. The thermally conductive epoxy bead coating protects the fragile NTC semiconductor element, provides robust mechanical strength, and enhances thermal coupling to the environment for a faster and more accurate temperature response.

Yes, but optimal performance requires good thermal contact. Its bead design is well-suited for measuring air or liquid temperature when suspended. For surface measurement, it is recommended to secure the bead directly to the surface using a thermally conductive adhesive or epoxy to minimize thermal lag. Ensure the mounting method does not exceed the component's maximum operating temperature of 125°C.