A PTC is a resettable device that increases resistance to limit current, whereas a traditional fuse is a one-time component that physically breaks the circuit.
Temperature Sensors - PTC Thermistors Component Intelligence
Engineering-grade PTC thermistors for thermal protection and current regulation.
What are Temperature Sensors - PTC Thermistors components?
PTC thermistors are non-linear resistors where resistance increases sharply at a specific threshold temperature. They are primarily used as self-resetting fuses (PPTCs) or as thermal switches to protect circuits from overcurrent and overheating conditions.
How to Choose Temperature Sensors - PTC Thermistors Components
Selecting a PTC requires balancing the switching temperature (Tref) with the operating current and voltage requirements of your circuit.
Switching Temperature (Tref)
Define the threshold where resistance increases exponentially to trigger protection.
Resistance at 25°C
Ensure the base resistance does not interfere with normal circuit operation at ambient temperatures.
Voltage Rating
Verify the maximum voltage the PTC can withstand during a fault state without breakdown.
Response Time
Consider the thermal mass and physical size, which dictate how quickly the device reacts to a fault.
Mounting Style
Choose between leaded, SMD, or chassis-mount packages based on your thermal coupling requirements.
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