Semifuse PTCs are resettable current fuses based on conductive polymer Positive Temperature Coefficient (PTC) technology. The PTC fuse will happily carry its rated "hold" current value until it is exceeded. If over-current occurs, the PTC resistance increases dramatically to limit the through current to safe levels.
The PTC will remain in this "off" state until the applied voltage is removed and the PTC has cooled down. The Semifuse PTC then "resets" to its pre-fault level ready to protect again.
Semifuse PTC fuses are available in a wide range of current values, voltages and formats. So whether you need a low-profile "strap", through-hole Printed Circuit Board (PCB) or SMD design, Semifuse is all you need.
