Merit Brass A4J50 Class J Fuse 600V 10 Pack

Product Description

The MERIT BRASS A4J50 is a Class J fuse rated for 600 volts, designed to provide high-performance overcurrent protection in commercial and industrial electrical systems. Class J fuses are recognized for their current-limiting characteristics, interrupting fault currents quickly to protect downstream equipment such as motors, transformers, and control panels. The A4J50 is supplied in a 10-unit pack and weighs 0.170 pounds. Licensed electricians and electrical contractors install this fuse type in branch-circuit and feeder applications where tight overcurrent coordination and space-efficient fuse holders are required.

Class J fuses are used in a wide range of commercial and industrial applications, including motor control centers, combination starters, panelboards, and disconnect switches. The 600-volt rating makes the A4J50 suitable for use in both single-phase and three-phase distribution systems commonly found in light commercial and industrial facilities. This fuse is installed in Class J-rated fuse holders and fusible disconnects, and the 10-pack format supports stocking needs for service contractors and maintenance crews.

Key Features

• 600-volt rating suitable for commercial and industrial branch-circuit protection
• Class J form factor provides current-limiting overcurrent protection
• Supplied in a 10-unit pack for efficient stocking and service calls
• Compact dimensions support installation in space-constrained fuse holders and disconnects
• Lightweight at 0.170 pounds per unit for easy handling and transport

Compatibility

Designed as an OEM-style replacement for Class J fuse applications requiring a 600-volt rated current-limiting fuse in standard Class J fuse holders and fusible disconnect switches.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit before removing or installing fuses. Verify the fuse holder is rated for Class J fuses before installation. Never substitute a fuse with a higher amperage rating than the circuit is designed for.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.