Ferraz Shawmut (Mersen) TRS450R/TRS450A — a Class RK5, time-delay fuse rated for 450 A and up to 600 V (AC or DC), designed for motor circuits and power-distribution protection. The unit features a dual-element construction and silver contacts for reliable, low-resistance operation, with an interrupting rating up to 200 kA IR. It measures 13-3/8 inches in length and 3-1/8 inches in diameter, a form factor intended for TR/RK5 fuse blocks and equipment requiring high-current protection. As part of Ferraz Shawmut’s Tri-Onic TR family, this 450 A fuse delivers time-delay protection to tolerate motor startup surges while safeguarding downstream wiring and equipment in industrial installations.
