Littelfuse PolySwitch 1812L Series 16V DC Resettable Fuse

The Littelfuse PolySwitch 1812L Series is a high-performance, surface-mountable, resettable PPTC (Polymer Positive Temperature Coefficient) fuse designed for overcurrent and overtemperature protection in a wide range of electronic circuits. Offering a compact 1812 (4532 metric) case style, it combines space-saving design with reliable, self-resetting functionality, eliminating the need for fuse replacement after a fault event.

This device is rated for a maximum voltage of 16V DC and features a holding current of 1.25A. It will trip at a current of 2.5A, with a rapid response time of 0.4 seconds under specified conditions, providing swift protection for sensitive components. With a maximum interrupting current rating of 100A, it can handle significant fault currents safely.

Engineered for robustness, the fuse operates effectively across a broad temperature range from -40°C to +85°C, making it suitable for applications in challenging environments. Its resettable nature ensures continued circuit protection and reduces maintenance costs over the product's lifespan, offering a reliable and cost-effective solution for safeguarding power supplies, battery packs, and other critical electronic pathways.