Mersen 6633R Class R Fuse Block

Product Description

The MERSEN 6633R is a Class R fuse block designed for use in electrical distribution and overcurrent protection applications. This fuse block provides a secure, code-compliant means of mounting and connecting Class R fuses within panelboards, disconnects, and industrial control panels. It is a robust, single-pack unit measuring 15.88 inches long, 12 inches wide, and 5.12 inches tall, and weighs 19.75 pounds. Licensed electricians and industrial maintenance technicians are the primary installers of this type of fuse block in both commercial and light industrial settings.

The MERSEN 6633R is suited for electrical distribution systems requiring Class R fuse protection. Its physical size makes it appropriate for larger ampacity applications typically found in commercial buildings, manufacturing facilities, and mechanical equipment rooms. This fuse block is installed in enclosed disconnect switches, panelboards, and custom electrical enclosures where Class R fuses are specified for branch circuit or feeder protection.

Key Features

• Accepts Class R fuses for reliable overcurrent protection
• Substantial construction at 19.75 pounds supports heavy-duty installation environments
• Compact footprint at 15.88 x 12 x 5.12 inches fits standard enclosure formats
• Single-pack unit for straightforward procurement and installation
• Designed to meet the mounting and connection demands of commercial and industrial electrical systems

Compatibility

Designed as an OEM-style replacement or direct-install fuse block for electrical enclosures, disconnects, and panelboards requiring Class R fuse holders.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize and lock out the circuit before mounting or servicing the fuse block. Verify that the enclosure dimensions and bus configuration are compatible with the 6633R before installation. Never install or replace fuses while the circuit is energized.

Technical Specifications

• Fuse Class: Class R
• Length: 15.88 inches
• Width: 12 inches
• Height: 5.12 inches
• Weight: 19.75 pounds
• Package Quantity: 1 per pack
• UPC: 78200166513

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: 6633R