Mersen A2K600R 600A 250V RK1 Time-delay Fuse

Product Description

The MERSEN A2K600R is a 600-amp, 250-volt Class RK1 time-delay fuse designed for branch-circuit and feeder protection in industrial and commercial electrical systems. Class RK1 fuses provide a high degree of current limitation, making them well suited for protecting motors, transformers, panelboards, and service-entrance equipment where both overload and short-circuit protection are required. The time-delay characteristic allows the fuse to ride through normal motor-inrush currents without nuisance opening, while still providing fast response to dangerous fault conditions. Licensed electricians and industrial maintenance technicians are the primary installers of this class of overcurrent protective device.

Class RK1 fuses are used in residential, commercial, and industrial applications wherever the National Electrical Code requires a current-limiting overcurrent protective device. The A2K600R is appropriate for motor branch circuits, feeder circuits, and service entrances rated up to 250 volts AC. The RK1 rejection feature prevents installation in a lower-rated fuse holder, enforcing the correct interrupting rating at the panel or disconnect.

Key Features

• 600-amp continuous current rating for high-capacity branch and feeder circuits
• 250-volt AC voltage rating suitable for single-phase and three-phase systems
• Class RK1 current-limiting design for superior short-circuit protection
• Time-delay action accommodates motor-inrush and transformer-magnetizing currents
• RK1 rejection feature prevents installation in non-RK1 fuse holders

Compatibility

Designed as an OEM-style replacement for Class RK1 fuse holders and disconnects rated 600 amps at 250 volts AC.

Installation Notes

Installation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lockout/tagout the circuit and verify absence of voltage before handling any fuse or fuse holder. Use properly rated fuse pullers when removing or inserting high-amperage fuses. Verify that the fuse holder is listed for Class RK1 devices and is rated for the circuit voltage and amperage before installation.

Technical Specifications

• Amperage: 600 amps
• Voltage Rating: 250 volts
• Fuse Class: RK1
• Fuse Type: Time-Delay
• UPC: 78200191541

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: A2K600R