Mersen 1MSC104 - Mersen 1SC and 1MSC semiconductor fuse blocks feature modular mounting that offers greater flexibility in adjusting to various fuse lengths. Both stud type and integral box connector versions are offered to allow for user preference of wire terminations. The integral box connector versions also provide for greater heat dissipation. All modular blocks are supplied in pairs but need to be ordered as two items to suit one fuse. Mounting hardware is supplied with the blocks 600 Volts 600 Amps .375 inch series.
Mersen

1MSC104

Alternate Item Number: 782001272784

UPC: 782001272784

Contact for Pricing

Overview

The Mersen 1MSC104 semiconductor fuse block (SKU: 1MSC104) is a UL-recognized (File E35113) modular fuse block designed for high-current industrial applications requiring precise circuit protection. Rated for 600V AC/DC and 600A maximum current, this .375-inch series fuse block features a two-piece modular design that accommodates various fuse lengths, ensuring installation flexibility. The integral box connector version (1MSC104) provides superior heat dissipation compared to stud-type alternatives, making it ideal for demanding environments where thermal management is critical. Key specifications include a 200kA SCCR rating, support for wire ranges from 500kcmil to #6 AWG, and mounting hardware supplied with each unit. The block is supplied as a single unit (order two for a pair) and features a compact footprint with phenolic insulators for rugged durability. Approved for global use, the 1MSC104 meets UL and IEC standards, ensuring compliance with international safety requirements. Applications include protection of power semiconductors in industrial drives, UPS systems, variable frequency drives (VFDs), and other high-speed switching environments. The modular design allows for easy replacement and maintenance, while the integral box connector simplifies wiring and enhances thermal performance. Trust Mersen’s expertise in semiconductor protection for reliable, long-term operation in your critical systems.
  • 600V AC/DC voltage rating with 600A maximum current capacity
  • UL-recognized (File E35113) and compliant with IEC standards
  • Modular two-piece design for flexible fuse length accommodation
  • Integral box connector version for enhanced heat dissipation
  • Supports wire ranges from 500kcmil to #6 AWG
  • 200kA SCCR rating for high-fault current protection
  • Mounting hardware included; supplied as single unit (order two for a pair)
  • Compact footprint with phenolic insulators for rugged durability

Specifications

Amperage Rating
600 A
Brand Name
Ferraz Shawmut
Connection
Box
Connection Type
Stud type or Integral box connector
Connection Type
Stud-type / Integral box connector
Current Rating
600 A
Mounting
Screw Mount
Mounting Type
Modular mounting
Phase
1
Series
1MSC
Size
.375 inch series
Special Features
Modular two-piece design Compact footprint Stud versions Heat dissipating integral box connector versions Accommodates a large range of semiconductor fuses Rugged phenolic insulators
Standard
UL Recognized Component to standard 4248-1, File E171957
Type
Semiconductor Fuseholders And Blocks
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
0 IN x 0 IN x 0 IN
Package Weight (Imperial)
0.000 L
Mersen 1SC and 1MSC semiconductor fuse blocks feature modular mounting that offers greater flexibility in adjusting to various fuse lengths. Both stud type and integral box connector versions are offered to allow for user preference of wire terminations. The integral box connector versions also provide for greater heat dissipation. All modular blocks are supplied in pairs but need to be ordered as two items to suit one fuse. Mounting hardware is supplied with the blocks 2500 Volts 400 Amps .25 inch series.

1MSC108

Mersen 1SC and 1MSC semiconductor fuse blocks feature modular mounting that offers greater flexibility in adjusting to various fuse lengths. Both stud type and integral box connector versions are offered to allow for user preference of wire terminations. The integral box connector versions also provide for greater heat dissipation. All modular blocks are supplied in pairs but need to be ordered as two items to suit one fuse. Mounting hardware is supplied with the blocks 2500 Volts 400 Amps .25 inch series.
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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.