Littelfuse PolySwitch RGEF Resettable PPTC Fuse 5A 16V DC

The Littelfuse PolySwitch RGEF Resettable PPTC Fuse is a polymer positive temperature coefficient (PPTC) device designed to provide reliable and resettable overcurrent protection for low-voltage direct current (DC) circuits. It operates on the principle of a sharp increase in resistance in response to excessive current, effectively 'tripping' to limit the fault current and protect sensitive components.

Once the fault is cleared and power is cycled, the fuse cools and automatically resets, restoring the circuit to normal operation. This eliminates the need for manual replacement, reducing maintenance downtime and costs in applications where occasional overloads may occur. Its compact rectangular shape and through-hole design make it easy to integrate onto printed circuit boards (PCBs).

With a voltage rating of 16V DC, a holding current of 5A, and a trip current of 8.5A, it is engineered to protect circuits that operate within these parameters. The device features a fast trip time of just 2 seconds under overload conditions, helping to prevent damage to downstream electronics. It can withstand high fault currents up to a maximum of 100A.

Constructed from durable materials, this fuse is designed for a wide operating temperature range from -40°C to +85°C, ensuring stable performance in demanding environments. Its 5.8mm lead spacing is a standard footprint for PCB mounting, offering design flexibility. The resettable function, combined with its robust specifications, makes it an ideal, cost-effective solution for protecting power supplies, battery packs, motor drives, and other DC-powered equipment.