TRI-ONIC® current-limiting time-delay fuses are engineered for overcurrent protection of motors and transformers, service entrance equipment, feeder and branch circuits. Time-delay for motor start-ups and transformer inrush currents without nuisance opening. Current-limiting for low peak let-thru current. Rejection-style design prevents replacement errors (when used with recommended fuse blocks). Easy-to-read label for quick brand recognition and replacement. Metal-embossed date and catalog number for traceability and lasting identification. Fiberglass body provides dimensional stability in harsh industrial settings. High-grade silica filler ensures fast arc quenching and high current limitation.
Specifications
| Brand Name | Ferraz Shawmut | Item Name | North American Power Fuse |
| Type | Time-Delay | Voltage Rating | 250 VAC |
| Amperage Rating | 500 A | Interrupt Rating | 200 kA |
| Fuse Class | Class RK5 | Mounting Type | Clip |
| Terminal Connection | Blade | Standards | UL 24812, CSA File Number E2137, CSA C22.2 No. 248.12 |
| Application | Optional solid-state SmartSpot indicator Time-delay for motor start-ups and transformer inrush currents without nuisance opening Current-limiting for low peak let-thru current Rejection-style design prevents replacement errors (when used with recommended fuse block) |