Mersen Class J 60A Fuse Base Adder Block, Tin-Plated Copper Clip

Mersen Class J 60A Fuse Base Adder Block, Tin-Plated Copper Clip

The Mersen Class J 60A Fuse Base Adder Block is a 600V-rated fuse base engineered for use with AJT, A4J, and HSJ Class J fuses. This adder configuration snaps onto 1-, 2-, or 3-pole blocks to build multi-pole segmented fuse blocks in the field, saving panel space and simplifying inventory. High conductivity tin-plated copper clips with spring reinforcement grip the fuse firmly, while the glass-filled polycarbonate (GFPC) body insulator delivers verified dielectric strength in excess of 2500V for dependable protection in demanding electrical distribution equipment.

Key Features

• Ampere Rating: Rated 60A, matching a 60A maximum fuse rating for reliable overcurrent protection with Class J fuses.
• Adder Pole Configuration: Snaps onto 1-, 2-, or 3-pole blocks to form multi-pole segmented fuse blocks of as many poles as needed.
• Reinforced Clip Connection: Box-style wire connection with spring-reinforced, high conductivity tin-plated copper clips for a secure, low-resistance connection.
• Durable Insulation: Glass-filled polycarbonate (GFPC) body insulator with dielectric strength verified in excess of 2500V.
• Torque Rating: 45 lb-in torque rating for properly secured terminations.
• Short Circuit Current Rating: 200 kA SCCR supports use in high fault-current applications.
• Operating Range: Rated for operation up to 80°C and storage from -25°C to 80°C, and 50/60 Hz frequency.
• Voltage Rating: 600V AC/DC rating for Class J fuse holder applications.

Certifications & Compliance

• CSA Certified, Class 6225, File 32169
• Meets UL4248 requirements (formerly UL512)
• UL Listed, Guide IZLT, File E52283

Technical Specifications

• Number Of Poles: Adder
• Torque Rating: 45 lb-in
• Ampere Rating: 60 A
• Body Insulating Material: GFPC
• Max Operating Temp: 80°C
• Min/Max Storage Temp: -25°C to 80°C
• Frequency: 50/60 Hz
• Wire Connections: Box with Reinforced Clip
• Product Line: Class J Fuseholders - Class J
• Max Fuse Rating: 60 A
• Installation Mounting: Direct Screw Mount
• Fuse Installation Method: Clip-in
• Short Circuit Current Rating (SCCR): 200 kA
• Rated Voltage AC/DC (UL): 600 V
• Country Of Origin: MX

Typical Applications

• Panelboards and Switchboard Fuse Protection
• Industrial Control Panels
• Motor Control Centers
• Electrical Distribution Equipment
• OEM Electrical Assemblies Using Class J Fuses

Why Mersen?

Mersen Class J fuse bases combine tin-plated, spring-reinforced copper clips with a glass-filled polycarbonate insulator tested well beyond 2500V dielectric strength, backed by CSA certification and UL4248 / UL Listing. The adder block design gives electrical contractors and panel builders a flexible, code-compliant way to configure multi-pole Class J fuse holders for reliable performance in commercial and industrial power distribution equipment.