LITTELFUSE PolySwitch 1812L Resettable Fuse PPTC, 1812 Metric - 33V

The LITTELFUSE PolySwitch 1812L Resettable Fuse is a surface mount PPTC device from the trusted 1812L series, designed to provide reliable, resettable overcurrent protection in a wide range of electronic applications. Resettable fuses, also known as polymeric positive temperature coefficient (PPTC) devices, offer a convenient alternative to traditional one-time fuses by automatically resetting after the fault is cleared, reducing downtime and maintenance costs.

With a compact, low-profile 1812 (4532 metric) case style, this fuse is ideal for space-constrained PCB designs where board real estate is at a premium. It features a fast response time to overcurrent events, ensuring rapid protection of sensitive components, while its low resistance helps minimise power loss and heat generation during normal operation. The device is compatible with high temperature soldering processes, making it suitable for modern lead-free manufacturing environments.

This PolySwitch fuse delivers a holding current of 0.75A and a trip current of 1.5A, with a typical time-to-trip of just 0.2 seconds at specified conditions. It can handle a maximum current of 20A, and operates reliably across a wide temperature range from -40°C to 85°C, making it suitable for demanding industrial and consumer applications. Whether used in plug-and-play protection for motherboards, USB peripherals, PCI cards, or game console port protection, this resettable fuse offers dependable performance and long-term reliability.

Engineered to meet rigorous quality standards, the LITTELFUSE PolySwitch 1812L Resettable Fuse is a smart choice for designers seeking effective, resettable circuit protection in compact electronic assemblies.

Variant Details

• Size: 33V