Ferraz Shawmut AJT17 1/2 Class J Time Delay Fuse 17.5A

Product Description

The FERRAZ SHAWMUT AJT17 1/2 is a Class J cylindrical time-delay fuse rated at 17.5 amps, designed for electrical circuit protection in demanding commercial and industrial applications. It provides both overload and short-circuit protection with a time-delay characteristic that allows temporary inrush currents to pass without nuisance tripping. The fuse is constructed with a fiberglass and GMG body, offering a 200 kA interrupting rating at AC and 100 kA at DC. Licensed electricians and electrical contractors install this type of fuse in motor branch circuits, control panels, and related power distribution equipment.

Class J fuses of this type are used in motor control centers, disconnect switches, and panelboards where tight current-limiting performance is required. The cylindrical form factor fits standard Class J fuse holders and fusible disconnect blocks. This fuse is appropriate for residential service-entrance panels, light commercial distribution boards, and industrial motor control applications where reliable overcurrent protection is essential.

Key Features

• 17.5-amp time-delay rating allows motor inrush current without nuisance tripping
• 200 kA interrupting rating at AC for high-fault-current environments
• 100 kA interrupting rating at DC
• Class J form factor fits standard Class J fuse holders and disconnect blocks
• Fiberglass and GMG body construction for durability
• Self-certified to 300-volt DC rating

Compatibility

Designed as an OEM-style replacement for Class J cylindrical time-delay fuse positions in standard Class J fuse holders and fusible disconnect switches rated for 17.5-amp overcurrent protection.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for fuse selection and circuit protection. Always de-energize and lock out the circuit before removing or installing fuses. Verify the fuse holder is rated for Class J fuses and that the circuit voltage and amperage do not exceed the fuse ratings. Do not substitute a different amperage or fuse class in the same holder.