Mersen 60312J - Fuse Block 600VAC 600VDC Class J 30A 2-Pole Screw
Mersen

60312J

Alternate Item Number: 60312J

UPC: 782001758158

Contact for Pricing

Overview

The Mersen 60312J Class J fuse block delivers reliable 600VAC/600VDC protection for industrial applications requiring 30A current handling. This 2-pole screw-mounted fuse block features a glass-filled polycarbonate (GFPC) or phenolic insulator with dielectric strength exceeding 2500V, ensuring robust electrical insulation. Designed for compatibility with stranded or solid copper or aluminum conductors, the 60312J supports wire ranges from #4-14 AWG (copper) or #2-14 AWG (copper/aluminum) depending on connector type. Its high-conductivity tin-plated copper fuse clips, available in spring-reinforced or non-spring configurations, provide consistent contact and heat cycling performance. The UL4248-listed and CSA-certified design meets OEM specifications, including the 'no aluminum' requirement for Class J applications. With a 200kA short-circuit current rating (SCCR), this fuse block is ideal for power distribution, motor control centers, and industrial control panels. Space-saving options and multi-pole adder blocks enable flexible configurations for 1-, 2-, or 3-pole segmented assemblies. Recommended mounting screws are 1/4" (0.250" diameter) for secure installation.
  • 600VAC/600VDC voltage rating with 30A current handling
  • 2-pole screw-mounted design with GFPC or phenolic insulator (dielectric strength >2500V)
  • Supports #4-14 AWG copper or #2-14 AWG copper/aluminum conductors
  • UL4248-listed and CSA-certified with 200kA short-circuit current rating (SCCR)
  • Tin-plated copper fuse clips (spring-reinforced or non-spring) for reliable heat cycling

Specifications

AC Voltage Rating
600 V
Amperage Rating
30 A
Brand Name
Mersen
Class
Class J
Connection
Screw
DC Voltage Rating
600 V
Material
Glass Filled Polycarbonate
Maximum Operating Temperature
80 C
Mounting
Direct Screw Mount
Number Of Poles
2-pole
Phase
2
Size
4 x 3.15 x 2.12 in
Size
101.6 x 80.01 x 53.848 mm
Special Features
Class J Blocks (600V) use with AJT, A4J, HSJ
Standard
All class J fuse blocks meet the requirements of UL4248 (formerly UL512) UL listed Guide IZLT, File E52283 CSA certified class 6225, File 32169
Type
UL/CSA Fuse Bases
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
4 in x 3.15 in x 2.12 in
Package Dimensions (L x W x H)
101.6 mm x 80.01 mm x 53.848 mm
Package Weight (Imperial)
0.414 lb
Package Weight (Metric)
0.188 kg
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Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.