Littelfuse JTD 100 100 A 600 V Class J Time Delay Fuse

Industrial circuit protection

The Littelfuse JTD 100 is a Class J time-delay fuse rated at 100 A and 600 VAC for industrial power distribution panels, motor control centres and heavy-duty equipment circuits. It suits maintenance engineers and electricians who need reliable overcurrent protection with high interrupting capacity in bolt-mounted holders.

Critical ampere rating

The single specification that determines fit is the 100 A current rating; the fuse must match the circuit’s design current exactly, otherwise nuisance blowing or inadequate protection will occur. Buyers who need a different ampere value must select another rating from the same series.

Thermal behaviour and power dissipation

In normal operation the dual-element construction absorbs temporary overloads without opening, limiting temperature rise across the stone-sand and granular-quartz filler. The 200000 A interrupting rating ensures safe fault clearing with minimal energy let-through, keeping downstream components cool and reducing acoustic noise from violent interruption.