Mersen 40657G - Fuse Block 480VAC 480VDC Class G 60A 2-Pole Copper Box
Mersen

40657G

Alternate Item Number: 40657G

UPC: 782001230906


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Overview

The Mersen 40657G (SKU: 40657G) is a 2-pole Class G fuse block rated for 480VAC and 480VDC applications, with a 60A current rating. Designed for industrial use, this fuse block features high-conductivity tin-plated copper alloy fuse clips and glass-filled polycarbonate (GFPC) insulators rated at 2500V dielectric strength. The copper box connector accommodates stranded or solid copper wire from #4 to #14 AWG, providing flexibility for various wiring configurations. The unique adder-block design allows for easy expansion to multi-pole segmented blocks by snapping additional poles onto 1-, 2-, or 3-pole blocks. With a short-circuit current rating (SCCR) of 100kA (10kA with quick connects), this fuse block meets UL 4248 and CSA certification standards. Ideal for panelboards, motor control centers, and distribution systems, the 40657G ensures reliable protection for Class G fuses in 15A, 20A, 30A, and 60A ratings. GFPC insulators are rated 1250°C RTI with 94V-0 flammability, ensuring safety in high-temperature environments.
  • Rated for 480VAC and 480VDC applications with 60A current capacity
  • High-conductivity tin-plated copper alloy fuse clips for reliable conductivity
  • Glass-filled polycarbonate (GFPC) insulators rated 2500V dielectric strength
  • Copper box connector supports stranded or solid copper wire (#4 to #14 AWG)
  • Unique adder-block design enables multi-pole expansion for flexible configurations

Specifications

AC Voltage Rating
480 V
Amperage Rating
60 A
Brand Name
Mersen
Class
Class G
Connection
Copper Box
Connection Type
Screw Terminal
Current Rating
60 A
DC Voltage Rating
480 V
Material
Copper, Glass-filled Polycarbonate
Material
Glass Filled Polycarbonate
Maximum Operating Temperature
80 C
Mounting
Direct Screw Mount
Number Of Poles
2-pole
Number Of Poles
2
Phase
2
Poles
2
Series
40657G
Size
3.78 x 1.62 x 1.4 in
Size
96.012 x 41.148 x 35.56 mm
Special Features
Unique integral DIN-rail adapters for 15, 20 & 30A blocks Unique adder-block design (all ampere ratings) for design flexibility Spring reinforcing standard for 60A clips Features high conductivity copper alloy fuse clips
Standard
All fuse blocks meet the requirements of UL 4248 UL Listed guide IZLT, File E52283 CSA Certified class 6225, File 32169
Type
UL/CSA Fuse Bases
Voltage Rating
480 VAC
Package Dimensions (L x W x H)
3.78 in x 1.62 in x 1.4 in
Package Dimensions (L x W x H)
96.012 mm x 41.148 mm x 35.56 mm
Package Weight (Imperial)
0.250 lb
Package Weight (Metric)
0.113 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.