Mersen trs450r Class RK5 Time-delay Fuse 450A 600V

Product Description

The MERSEN trs450r is a Class RK5 current-limiting time-delay fuse rated at 450 amps and 600 volts AC/DC. Sold under the Tri-Onic TRS-R product line, it features a blade-style terminal configuration and is engineered for overcurrent protection in demanding electrical distribution systems. The time-delay characteristic allows the fuse to ride through harmless motor starting currents and transformer inrush currents without nuisance opening, while still providing fast, reliable response to damaging fault conditions. Licensed electricians and electrical contractors are the primary installers of this device.

The trs450r is suited for service entrance equipment, feeders, branch circuits, motor circuits, and transformer protection applications. Its current-limiting action reduces let-through energy during high-magnitude fault events, helping protect downstream equipment and wiring. Residential, commercial, and light industrial electrical systems that require Class RK5 performance benefit from this fuse type. It is appropriate wherever time-delay overcurrent protection at 600 volts and 450 amps is specified.

Key Features

• Class RK5 current-limiting time-delay design for motor and transformer circuit protection
• 450 amp continuous current rating
• 600 volt AC and 600 volt DC rating for broad application flexibility
• Blade-style terminals for standard fuse holder and disconnect compatibility
• Time-delay characteristic handles motor starting inrush without nuisance opening
• Suitable for service entrance, feeder, and branch-circuit overcurrent protection

Compatibility

Designed as an OEM-style Class RK5 replacement fuse for use in blade-type fuse holders and fusible disconnects rated for 450 amps at 600 volts AC or DC.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always de-energize and lock out the circuit and verify absence of voltage with a meter before removing or installing any fuse. Use properly rated fuse pullers and insulated tools. Never replace a fuse with a higher ampere rating than specified for the circuit.

Technical Specifications

• Ampere Rating: 450A
• Voltage Rating (AC): 600 volts AC
• Voltage Rating (DC): 600 volts DC
• Fuse Class: RK5
• Fuse Type: Time-Delay, Current-Limiting
• Terminal Style: Blade
• Product Series: Tri-Onic TRS-R

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: trs450r