Shawmut TR90 Time Delay Dual-Element Tri-Onic Fuse Class K-5

The Shawmut TR90 Tri-Onic fuse is a time-delay dual-element overcurrent protector rated for 90 A at 250 VAC. As part of Shawmut’s Tri-Onic line, it employs a time-delay (slow-blow) design and dual-element construction to tolerate brief startup surges while still interrupting current during sustained overloads. The “Class K-5” designation is part of its identifying specification, signaling its place within Shawmut’s fuse families for protective applications. With a 90 A current rating and 250 VAC operating voltage, the TR90 defines the electrical envelope within which it will safely operate and protect wiring and components. This fuse is suitable for electrical circuits and panels that require dependable time-delay protection against transient overloads, helping prevent nuisance trips in systems where short-lived surges are common. Installations that demand controlled interruption and robust surge handling can rely on the TR90 to safeguard equipment and wiring without sacrificing uptime.