PFRX.110.2 Circuit Protection

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PTC resettable fuses (also known as polymeric positive temperature coefficient, or PPTC fuses) are a type of electrical protection device used in automotive, telecom, datacom, and consumer electronic applications. They are intended to protect against the overcurrent conditions that can occur when a short circuit occurs. In comparison to other types of fuses, PTCs can be reset to an operational state after a power glitch or fault. PTC resettable fuses typically work in three stages: current blocking, current limiting, and thermal or electrical reset.

The PFRX.110.2 is a type of PTC Resettable Fuse that is ideal for general purpose circuit protection. It is available in a variety of amperage ratings, from 1A all the way up to 25A. The PFRX.110.2 is a high-current version of the PFRX.110, offering increased current carrying capability, voltage drop and enhanced thermal protection. It is designed to protect against dangerous overcurrent conditions, and it features self-resetting or positive temperature coefficients (PTC).

The PFRX.110.2 is suitable for applications involving multiple phase inverters, such as DC/DC converters, motor control drives, and medium-voltage AC drives. It can also be used in telecom and datacom applications, computer power supplies, and other general-purpose protection applications. It is available in SMT and through-hole packages for easy and secure mounting and installation.

The working principle of the PFRX.110.2 is that when the current increases beyond the predetermined rated value, the device activates and quickly trips. This interrupts the circuit and prevents further current from flowing through the circuit. This prevents damage to components or the electrical system due to dangerous overcurrent conditions. After the overcurrent is removed, the device can reset itself without any user intervention.

When a fault occurs, the PTC fuse is designed to react quickly and safely. It acts like an ordinary fuse, but with the added ability to reset itself once the fault has been removed. It uses a positive temperature coefficient (PTC) technology that creates a temperature-dependent resistance when it is subjected to current. This resistance boosts the fuse’s reaction time during fault ON conditions. Once the fault is removed, the device cools down and the resistance dissipates, allowing it to reset itself.

The PFRX.110.2 provides reliable and easy-to-implement protection against overcurrents in both DC and AC circuits. It offers a cost-effective and reliable solution to protect against the dangerous conditions that are caused by short circuits and other overcurrent issues. It is widely used in a variety of industries, from consumer electronics to industrial automation, and is a popular choice for circuit protection.

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