121-104KAF-Q01

NTC thermistors, also known as negative temperature coefficient thermistors, are temperature sensors that consist of a sintered bead made of semiconducting material. They act as electrical resistors with variable resistance, which decreases as the temperature increases. A typical NTC thermistor is made of a ceramic material containing metal oxides and features a negative temperature coefficient of resistance. This means that as the temperature increases, the bead’s resistance decreases. They are quite stable, long-lasting, and typically used to measure relatively low temperatures.

The 121-104KAF-Q01 is a NTC thermistor designed for a variety of applications. It is composed of a semiconductor ceramic winding a NTC chip and two pad electrodes. The NTC chip acts as an electrical resistor and measures the temperature of a certain area. Its resistance decreases as temperature increases and its contacts are used to send a signal through a circuit board. The application field of the 121-104KAF-Q01 range from HVAC systems, automotive heaters and automotive air conditioning systems, to room and process temperature measurement.

The 121-104KAF-Q01 is designed to measure the temperature of a given area between -40°C and +125°C. The thermistor is connected to a resistance temperature detector (RTD) or resistance thermometer which converts the electrical signal from the thermistor into a measurable temperature. Depending on the number of contacts present at the chip, the 121-104KAF-Q01 is available in 3-, 4- and 5-wire configurations. The 3-wire configuration is used when two point calibration is necessary, while the 4-wire configuration is used when three point calibration is necessary. Additionally, the 5-wire configuration is used for applications that require an ambient temperature detection Feature.

The working principle of the 121-104KAF-Q01 thermistor is based on the thermistors’ property of a negative temperature coefficient. The bead is composed of a semiconductor material and when the temperature increases, the resistance of the bead decreases. The temperature is measured by measuring the resistance of the bead. A circuit is used to measure the resistance of the bead which is connected to a resistance temperature detector or resistance thermometer. The RTD or resistance thermometer converts the electrical signal from the thermistor into a measurable temperature.

In conclusion, the 121-104KAF-Q01 is a thermistor belonging to the NTC type family. This thermistor consists of a sintered bead composed of semiconducting material features a negative temperature coefficient of resistance. It is designed to measure temperatures between -40°C and +125°C and is suitable for various applications such as HVAC systems, automotive heaters and air conditioning systems, and room and process temperature measurement. The working principle of the thermistor is based on the thermistors’ property of a negative temperature coefficient. The bead’s resistance decreases as temperature increases and the temperature can be measured by measuring the resistance of the bead.