SCHURTER UST 1206 SMD Fuse, Slow Blow, 32V AC / 63V DC - 12A

The SCHURTER UST 1206 is a high-reliability, non-resettable SMD (Surface-Mount Device) fuse designed for demanding electronic applications. This time-lag (slow-blow) fuse features a robust epoxy glass body with nickel and gold-plated copper terminals, ensuring excellent solderability, low contact resistance, and long-term reliability in challenging environments.

Its primary function is to provide dependable secondary protection in both AC and DC circuits, particularly those susceptible to inrush currents, such as power supplies, industrial controls, and safety-critical systems. The slow-blow characteristic allows it to withstand temporary surge currents without nuisance blowing while still offering fast, definitive protection against sustained overloads and short circuits.

The fuse is engineered for a wide operating temperature range from -55°C to 90°C, making it suitable for use in industrial equipment and other applications where thermal stability is paramount. It holds a UL94V-0 flammability rating, indicating superior flame-retardant properties and enhancing the overall safety of the end product. With a high melting I²t value and a substantial breaking capacity of 100A for both AC and DC, it provides robust fault interruption capability, helping to prevent damage to sensitive downstream components.

Its compact 1206 case style (3216 metric) makes it ideal for space-constrained PCB designs, including those found in LCD backlight inverters, telecommunications hardware, and automotive electronics. This fuse represents a key component in creating safe, reliable, and durable electronic assemblies for professional and industrial use.

Variant Details

• Size: 12A