Littelfuse TR5 372 Series Time Delay PCB Fuse, 500 mA, 250 V

The Littelfuse 372 Series comprises TR5 sub-miniature, time-lag, radial leaded fuses designed for secure circuit protection. These fuses are engineered to high standards and offer versatile mounting options, allowing them to be soldered directly onto a printed circuit board or plugged into a convenient two-pin socket for serviceability.

Designed in accordance with IEC 60127-3 standards, this 500 mA fuse is rated for 250 VAC. The time-delay (slow-blow) characteristic allows it to withstand temporary current surges, such as those from inrush currents, without nuisance blowing, while still providing reliable protection against sustained overloads and short circuits.

A key benefit of this series is its compact form factor, which significantly reduces the space required on the PCB—a critical consideration in modern, densely packed electronics. The robust, shock-safe casing is also vibration resistant, ensuring reliable performance in demanding environments.

The fuse boasts a low internal resistance, minimising power loss and heat generation during normal operation. It is approved by major international safety bodies, including UL, VDE, PSE/JET, and CCC, confirming its suitability for global markets and safety-critical applications.

With a high breaking capacity of 35A AC, it can safely interrupt substantial fault currents. Its operational temperature range is extensive, from -40°C to 85°C, making it ideal for use in industrial controls, power supplies, telecommunications equipment, and other safety-rated electronics where dependable, long-term protection is essential.