Littelfuse nanoSMDC020F 0.2A Resettable Surface Mount Fuse 24V DC, PolySwitch Series, Tin Plated Terminals NANOSMDC020F

The Littelfuse NANOSMDC020F is a surface mount resettable fuse from the PolySwitch nanoSMDC series, rated at 0.2A hold current and 24V DC. Designed to protect sensitive electronic circuits against excessive current, this device rapidly transitions from a low resistance to a high resistance state under electrical overload or short-circuit conditions. Once the fault is cleared and power is cycled, the fuse automatically resets and returns to its nominal resistance, supporting thousands of protection cycles without replacement.

Thanks to its surface mount design and extremely compact dimensions (length 3.4mm, width 1.8mm, height 0.82mm), the NANOSMDC020F is ideal for applications requiring space-saving solutions, such as densely populated circuit boards found in industrial electronics, consumer products, and automotive control units. Tin plated terminals ensure robust solderability and reliable electrical contact throughout the device's lifetime.

The fuse features a fast 0.1-second trip time, making it highly effective for rapid intervention in case of overcurrent events while minimizing the risk to connected equipment. The device's power dissipation is rated at 0.6W, with a broad operating temperature range up to 85°C, allowing for deployment in demanding environments like security systems, power supplies, instrumentation, control devices, and telecom systems.

Resettable protection eliminates the need for replacement after typical fault events, offering maintenance-free operation. Compact SMD footprint enables high-density PCB designs with standard assembly practices. Rated for 0.2A hold current (continuous operation) and 420mA trip current (interrupt threshold) at 24V DC operating voltage.

Low resistance in normal condition; transitions to high resistance during fault; returns to normal after power cycle. Robust tin plated terminals for secure and reliable mounting. Suitable for security systems, power supplies, power switching, automotive, medical devices, computers, and instrumentation.

PolySwitch nanoSMDC series certified design ensures repeatable performance.

Common industrial use cases include circuit protection for DC power distribution, telecommunication devices, instrumentation panels, automotive control modules, and electronic assemblies in manufacturing and commercial environments. The rapid reset and compact sizing make it ideal for automated assembly lines and modern circuit designs.

Explore more Littelfuse circuit protection components and surface mount fuses in the Electrical Fuse category on EnvMart.