Merit Brass TRS500R Time Delay Fuse 500A 600V RK5

Product Description

The MERIT BRASS TRS500R is a 500-amp, 600-volt, Class RK5 time-delay fuse designed for overcurrent protection in industrial and commercial electrical distribution systems. The time-delay characteristic allows the fuse to carry temporary inrush currents from motors and transformers without nuisance opening, while still responding quickly to sustained faults. Rated at 500 amps and 600 volts, this fuse fits standard Class RK5 fuseholders and panelboards. Installation is typically performed by a licensed electrician working within NEC-compliant distribution equipment.

Class RK5 time-delay fuses are used in motor branch circuits, feeder circuits, and industrial control panels where inrush current tolerance is required. This fuse is suitable for both single-phase and three-phase applications in residential service entrances, commercial panels, and light industrial settings. The 600-volt rating accommodates the full range of standard North American distribution voltages.

Key Features

• 500-amp continuous current rating for high-capacity branch and feeder circuits
• 600-volt rating covers standard North American single-phase and three-phase distribution
• Class RK5 form factor fits listed Class RK5 and Class H fuseholders
• Time-delay design tolerates motor and transformer inrush without nuisance opening
• Provides downstream short-circuit and overload protection per NEC requirements

Compatibility

Designed as an OEM-style replacement for Class RK5 time-delay fuses in listed 500-amp, 600-volt fuseholders and fusible disconnect switches.

Installation Notes

Installation must be performed by a licensed electrician. De-energize and lock out the circuit at the upstream disconnect before handling or replacing fuses. Verify the fuseholder is rated for Class RK5 fuses at 600 volts and 500 amps before installation. Follow NEC Article 240 and local electrical code requirements for overcurrent protection and fuseholder compatibility.

Technical Specifications

• Amperage Rating: 500 amps
• Voltage Rating: 600 volts
• Fuse Class: RK5
• Fuse Type: Time Delay
• UPC: 78200174929

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: TRS500R