Mersen 60300J Class J Fuse Base, Reinforced Clip, Tin-Plated Copper

Mersen 60300J Class J Fuse Base, Reinforced Clip, Tin-Plated Copper

The Mersen 60300J is an open-style Class J fuse base built to accept fuses rated up to 30A at 600V AC/DC, providing a dependable foundation for industrial and commercial power distribution circuits. This model is offered across a family of pole configurations, including 2-pole, 3-pole, and Standard versions, so the correct base can be matched to the specific circuit and panel layout on the job. Every version shares the same core construction: high-conductivity, tin-plated copper fuse clips with a spring-reinforced design for secure, low-resistance fuse retention, a box-style connector that accepts stranded or solid copper or aluminum wire, and a molded glass-filled polycarbonate (GFPC) insulating body. Backed by CSA certification and UL listing to UL4248 (formerly UL512), this fuse base is engineered for reliable, code-compliant performance in demanding electrical environments.

Key Features

• Ampere Rating: Rated for Class J fuses up to 30A for dependable overcurrent protection.
• Voltage Rating: Rated 600V AC/DC for use in demanding industrial and commercial power distribution systems.
• Pole Configuration Options: Available in 2-pole and 3-pole configurations, as well as a Standard version, to suit a range of circuit and panel requirements.
• Reinforced Fuse Clips: High-conductivity, tin-plated copper fuse clips with spring-reinforced construction for a secure, low-resistance fuse connection.
• Box Connector: Accepts a wide range of stranded or solid copper or aluminum wire for flexible field wiring.
• Insulating Material: Molded glass-filled polycarbonate (GFPC) body with dielectric strength in excess of 2500V for reliable electrical isolation.
• Short Circuit Current Rating: 200kA SCCR supports use in systems with high available fault current.
• Operating Temperature Range: Rated from -25°C to 80°C for stable performance across ambient conditions.
• Frequency Rating: Suitable for 50/60Hz electrical systems.

Certifications & Compliance

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

Technical Specifications

• Ampere Rating: 30 A
• Max Fuse Rating: 30 A
• Fuse Installation Method: Clip-in
• Rated Voltage AC (UL): 600 V
• Rated Voltage DC (UL): 600 V
• Short Circuit Current Rating (SCCR): 200 kA
• Max Operating Temp: 80 °C
• Min Storage Temp: -25 °C
• Max Storage Temp: 80 °C
• Frequency: 50/60 Hz
• Country of Origin: Mexico

Typical Applications

• Industrial Power Distribution Panels
• Motor Control Centers
• Disconnect Switches and Safety Switches
• Panelboards and Switchboards
• OEM Equipment Fusing
• Class J Fuse Protection Systems

Why Mersen?

Mersen fuse bases combine high-conductivity, tin-plated copper clips with a spring-reinforced design and durable GFPC insulation rated for dielectric strength in excess of 2500V, delivering secure, low-resistance fuse connections across every pole configuration in the family. With CSA certification and UL listing to UL4248, this Class J fuse base is built for reliable, code-compliant performance in professional electrical installations where consistent fuse retention and a high 200kA short circuit current rating are essential.