Gould Shawmut TR300R Time Delay Fuse Class RK5 300A 250V

The Gould Shawmut Tri-Onic TR300R is a time-delay (slow-blow) fuse designed for overcurrent protection in electrical circuits, offering a controlled balance between tolerating startup surges and interrupting longer overloads. It is rated 300 A at 250 V and classified as RK5, aligning with Gould Shawmut’s Tri-Onic line of high-current fuses. The TR300R’s time-delay action accommodates brief inrush currents while interrupting sustained faults, providing reliable protection in circuits where startup surges are expected. This 300A, 250V Class RK5 fuse serves as a drop-in protective device for panels, feeders, and other electrical assemblies requiring dependable fault interruption without nuisance trips. In industrial and commercial electrical systems where consistent protection is essential, the TR300R offers a specification-aligned solution in a durable, clearly identified form factor.