Bussmann LKS400 Fuse Link 400A 600V Class K Time-delay

Product Description

The BUSSMANN LKS400 is a 400 amp, 600 volt Class K renewable fuse link designed for overcurrent protection in industrial and commercial electrical systems. It carries a time-delay characteristic that allows temporary overloads to pass without tripping, which reduces nuisance openings on motor circuits and other inductive loads. The renewable design means the fuse link element can be replaced inside the existing fuse body rather than replacing the entire fuse assembly. Licensed electricians and maintenance technicians install this component in branch circuit and feeder applications where sustained fault current must be interrupted quickly and reliably.

This fuse link is suited for industrial facilities, commercial buildings, and manufacturing environments where Class K fuse holders are already in service. The time-delay super lag characteristic makes it appropriate for motor branch circuits, transformer primaries, and other loads with high inrush current at startup. It fits into compatible Class K fuse holders and is a direct renewable replacement element for RES-style fuses rated at this amperage and voltage.

Key Features

• 400 amp continuous current rating for high-demand branch and feeder circuits
• 600 volt rating suitable for standard commercial and industrial distribution voltages
• Time-delay characteristic reduces nuisance openings on motor and transformer inrush currents
• Renewable fuse link design allows element replacement without discarding the entire fuse body
• Class K construction for use in compatible Class K fuse holders

Compatibility

Designed as an OEM-style renewable replacement fuse link for Class K fuse holders accepting 400 amp, 600 volt RES-style fuse elements in commercial and industrial overcurrent protection applications.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize and lock out the circuit completely before opening the fuse holder or handling the fuse link. Verify that the replacement fuse link amperage and voltage ratings match the circuit requirements and the fuse holder specifications before installing. Do not attempt to install a renewable link in a fuse holder that is damaged, corroded, or rated for a different fuse class.