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.

Technical Specifications

• Voltage Rating: 600 volts
• Fuse Class: Class J
• Quantity per Pack: 10
• Package Dimensions: 2.440 inches x 2.190 inches x 5.500 inches
• Weight: 0.170 pounds
• UPC: 78200196024

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: A4J50