Write short note of thermistor
Answers
Answered by
11
Thermistor
A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiter, temperature sensors (Negative Temperature Coefficient or NTC type typically), self-resetting overcurrent protectors, and self-regulating heating elements. (Positive Temperature Coefficient or PTC type typically).
Thermistors are of two opposite fundamental types:
With NTC, resistance Decreases as temperature rises to protect against inrush overvoltage conditions. Commonly installed series in a circuit.
With PTC, resistance Increases as temperature rises to protect against overcurrent conditions. Commonly installed series in a circuit.
Thermistors differ from resistance temperature detectors (RTDs) in that the material used in a thermistor is generally a ceramic or polymer, while RTDs use pure metals. The temperature response is also different; RTDs are useful over larger temperature ranges, while thermistors typically achieve a greater precision within a limited temperature range, typically −90 °C to 130 °C.[1]
Negative temperature coefficient (NTC) thermistor, bead type, insulated wires
Type Passive
Working principle Electric resistance
Electronic symbol
A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiter, temperature sensors (Negative Temperature Coefficient or NTC type typically), self-resetting overcurrent protectors, and self-regulating heating elements. (Positive Temperature Coefficient or PTC type typically).
Thermistors are of two opposite fundamental types:
With NTC, resistance Decreases as temperature rises to protect against inrush overvoltage conditions. Commonly installed series in a circuit.
With PTC, resistance Increases as temperature rises to protect against overcurrent conditions. Commonly installed series in a circuit.
Thermistors differ from resistance temperature detectors (RTDs) in that the material used in a thermistor is generally a ceramic or polymer, while RTDs use pure metals. The temperature response is also different; RTDs are useful over larger temperature ranges, while thermistors typically achieve a greater precision within a limited temperature range, typically −90 °C to 130 °C.[1]
Negative temperature coefficient (NTC) thermistor, bead type, insulated wires
Type Passive
Working principle Electric resistance
Electronic symbol
Answered by
1
Answer:
A thermistor is a type of resistor whose resistance is strongly dependent on temperature,more so than in standard resistors. the world is a combination of thermal and resistor. An NTC is commonly used as a temperature sensor, or in series with a circuit as an inrush current limiter.
Similar questions