RFE International, Inc. is your ONLY source for the Fuzetec FCMOV with PPTC!
A resettable fuse, also known as a PPTC (polymer positive temperature coefficient) device, protects electronic circuits from overcurrent by dramatically increasing its electrical resistance when it heats up, thereby reducing the current flow. Unlike traditional fuses that permanently break, a resettable fuse automatically returns to its low-resistance state and resumes normal operation once the fault condition is cleared and the device cools down. This self-resetting feature makes them cost-effective and ideal for applications where manual replacement of fuses is inconvenient.
PPTC resettable fuses are designed and made of patented novel PPTC material in thin chip form where conductive particles are dispersed in a polymer that has a crystalline structure. At normal operating conditions there are numerous chains forming conductive paths throughout the PPTC material. Under faulty conditions (tripped State), excessive current flows through the PPTC device and the PPTC material heats up. This makes the polymer matrix’s morphology change from crystalline to amorphous. Under these conditions the conductive particles move apart from each other, most of them no longer conduct current and the resistance of the device increases sharply. Upon the fault current being removed, the resettable fuse is reset and allows the current through the circuit again.
PPTC Applications:
- Consumer Electronics: Protecting charging ports, battery packs, headphones, and mobile/wearable devices from overcurrents.
- Automotive: Safeguarding motors, actuators, security systems, and various electronic modules (like ECUs).
- Industrial & Communication: Securing power lines, I/O ports, telecommunication equipment, and security systems.
- Computer Peripherals: Protecting USB ports, internal data lines, and other interfaces.
Notes – PPTC Technical Notes, Pad Layouts & Solder Reflow, Rework Recommendations,
The Fuzetec FCMOV is a Metal Oxide Varistor (MOV) with a Polymeric Positive Temperature Thermistor (PPTC resettable fuse) attached in-line with the MOV.
Why should a company consider using a Fuzetec FCMOV?
- Offers better protection than an unprotected MOV
- Faster than a TMOV
- Extends the useful life of the MOV
- Does not fail in many situations where others fail or even burn
- FCMOV price is lower than TMOV at about a cost reduction of 40% to 50%
A Polymeric Positive Temperature Thermistor (PPTC) resettable fuse is an electronic component that protects circuits from overcurrent by dramatically increasing its resistance when exposed to excess current or heat, and then automatically resetting once the fault is cleared and the device cools down. It functions like a self-healing fuse, made from a conductive polymer that expands and separates conductive particles under fault conditions, creating a high-resistance state to limit current. This self-resetting ability makes PPTCs ideal for applications requiring continuous reliability, such as in battery packs, automotive electronics, and consumer devices.
A Varistor is a semiconductor diode with resistance dependent on the applied voltage.
FCMOV vs TMOV Comparison
FCMOV 14 Advance Series
FCMOV 20 Advance Series
