The 10D-9 NTC Thermistor is a Negative Temperature Coefficient (NTC) resistor primarily used for inrush current limiting in electronic circuits. It helps protect sensitive electronic components from high surge currents that occur when power is first applied to a device. With an initial resistance of 10 ohms at 25°C and a compact 9mm disc size, the 10D-9 thermistor is widely used in power supplies, battery chargers, LED drivers, adapters, and various industrial electronic equipment.
An NTC thermistor exhibits a decrease in resistance as its temperature increases. When the equipment is powered on, the 10D-9 thermistor presents a relatively high resistance of approximately 10Ω, limiting the initial surge current. As current flows through the thermistor, it heats up and its resistance drops significantly, allowing normal operating current to pass with minimal power loss.
This self-regulating characteristic makes the 10D-9 an effective and economical solution for protecting electronic circuits from damaging startup currents.
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