Merit Brass A4BQ600 Class L Fuse 600V

Product Description

The MERIT BRASS A4BQ600 is a Class L fuse rated at 600 volts, designed for high-ampacity overcurrent protection in industrial and commercial electrical systems. Class L fuses are bolt-in devices built for service entrance, feeder, and large motor branch circuit applications where high fault-current interrupting capacity is required. Licensed electricians and electrical contractors install this type of fuse in switchboards, panelboards, and motor control centers. The 600-volt rating makes it suitable for use in both single-phase and three-phase distribution systems operating at or below that voltage threshold.

Class L fuses are commonly specified in commercial and light industrial installations where high short-circuit current ratings and time-delay characteristics are needed. This fuse is installed in bolted fuseholder assemblies and is not interchangeable with standard blade-type or cartridge-clip fuse holders. Typical applications include feeder protection, service entrance equipment, and large motor branch circuits requiring UL Class L-rated overcurrent devices.

Key Features

• 600-volt rating suitable for single-phase and three-phase distribution systems
• Class L form factor designed for bolted fuseholder assemblies
• Intended for high fault-current overcurrent protection in feeder and service entrance applications
• Compatible with switchboards, panelboards, and motor control center fuseholder sections rated for Class L devices

Compatibility

Designed as an OEM-style replacement for Class L bolted fuseholder assemblies rated at 600 volts in commercial and industrial electrical distribution equipment.

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 at the upstream disconnect before handling or replacing any fuse. Class L fuses are bolted-in devices requiring appropriate torque tools for the fuseholder hardware. Verify the replacement fuse ampere rating matches the circuit protection requirements before installing.