A PTC resets automatically once the fault condition is removed and the device cools down. You must remove the power source or reduce the current to allow the polymer to return to its low-resistance state.
PTC Resettable Fuses Component Intelligence
Select self-resetting polymer fuses for reliable overcurrent protection in compact, high-cycle applications.
What are PTC Resettable Fuses components?
PTC resettable fuses (Polymeric Positive Temperature Coefficient) act as solid-state circuit breakers. They increase resistance when current exceeds a threshold, limiting flow, and reset once the fault is removed and power is cycled, making them ideal for inaccessible circuits.
How to Choose PTC Resettable Fuses Components
Select based on steady-state current, trip current, and maximum operating voltage.
Hold Current (Ihold)
The maximum current the device can carry without tripping at a specific ambient temperature.
Trip Current (Itrip)
The minimum current at which the device will transition to a high-resistance state.
Max Voltage (Vmax)
Ensure the device's maximum voltage rating exceeds the circuit's potential fault voltage.
Time-to-Trip
Evaluate how quickly the device reacts to an overcurrent event to protect sensitive downstream components.
Package Geometry
Choose between SMD for automated assembly or radial leaded for through-hole prototyping.
Popular PTC Resettable Fuses Components
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