Mersen USCM1 - Mersen UltraSafe Fuse Modules (USFM) have a unique, compact design suited for use with 45mm wide IEC contactors. These modules also offer other features not found on other class CC and midget UltraSafe fuseholders such as an auxiliary contact option. When the auxiliary is wired to an adjacent contactor the load is dropped out by the contactor immediately once the fuse extractor handle is opened. Additionally, the fuse module features padlock capabilities, compact bus bars for line side terminations, and tool free removal from DIN rail. Yet the fuse modules still incorporate well known UltraSafe features such as IP20 protection, easy operating fuse extraction handles and an open fuse visual indication option. 1-10 marking strip
Mersen

USCM1

Alternate Item Number: 782001443344

UPC: 782001443344

Contact for Pricing

Overview

The Mersen USFM UltraSafe Fuse Modules (SKU: USCM1) are engineered for robust industrial power distribution, specifically designed for seamless integration with 45mm wide IEC contactors. These dedicated 3-pole fuse modules offer advanced safety and operational features, including an auxiliary contact option (1NO/1NC) that ensures immediate load disconnection via the contactor when the fuse extractor handle is opened, enhancing personnel safety and system control. Built for reliability, the USFM modules provide finger-safe IP20 protection, meeting stringent IEC and DIN standards. They incorporate easy-to-operate fuse extraction handles and an optional visual blown-fuse indication, allowing for quick and safe fuse replacement and status monitoring. Installation is streamlined with tool-free removal from DIN rail and compact busbars for efficient line-side terminations. For enhanced security, the USFM modules feature padlock capabilities, allowing the fuse extractor handle to be secured in the OPEN position with a 1/4" shank diameter padlock, crucial for maintenance and lockout/tagout procedures. Available for both Class CC and Midget 10x38mm fuses, the USFM modules offer high SCCR ratings: 200kA for Class CC (USFMCC) and 100kA for Midget (USFM10) at up to 600VAC/DC. They are ideal for motor circuits, control circuits, and transformer protection, offering a superior alternative to circuit breakers for higher SCCR requirements. Key specifications include: - **Voltage Rating:** 600VAC / DC - **Amperage Rating:** 30A Maximum - **SCCR (Class CC):** 200kA - **SCCR (Midget):** 100kA - **Protection:** IP20 Finger-Safe - **Mounting:** 35mm DIN-rail, tool-free removal - **Auxiliary Contact:** Optional 1NO/1NC - **Padlocking:** Yes, 1/4" shank diameter - **Fuse Types:** Class CC and Midget 10x38mm Approvals include UL Listed/Recognized and CSA Certified, with IEC certification for the Midget fuse modules. The USFM series is designed for applications requiring non-load disconnect and padlock compliance, ensuring operational safety and efficiency in demanding industrial environments.
  • Designed for 45mm wide IEC contactors
  • Optional auxiliary contact (1NO/1NC) for immediate load disconnection
  • Padlock capability for enhanced safety and compliance
  • Tool-free DIN rail mounting for quick installation
  • IP20 finger-safe protection with easy fuse extraction

Specifications

Application
Used with Ultrasafe Fuse Holders
Brand Name
Ferraz Shawmut
Class
Accessory
IP Rating
IP20
Mounting Type
DIN Rail
Series
UltraSafe
Series
UltraSafe Fuse Modules (USFM)
Sub Brand
UltraSafe
Type
UltraSafe Accessory
USFM - BB 600V 3-Pole C1 phases

USFMBBC1

USFM - BB 600V 3-Pole C1 phases
USFM - Aux Contact EarlBreak/Late Make

USFMAC11

USFM - Aux Contact EarlBreak/Late Make
USFM - BB 600V 3-Pole B3 phases

USFMBB3

USFM - BB 600V 3-Pole B3 phases
USFM - BB 600V 3-Pole B4 phases

USFMBB4

USFM - BB 600V 3-Pole B4 phases
Mersen UltraSafe Fuse Modules (USFM) have a unique, compact design suited for use with 45mm wide IEC contactors. These modules also offer other features not found on other class CC and midget UltraSafe fuseholders such as an auxiliary contact option. When the auxiliary is wired to an adjacent contactor the load is dropped out by the contactor immediately once the fuse extractor handle is opened. Additionally, the fuse module features padlock capabilities, compact bus bars for line side terminations, and tool free removal from DIN rail. Yet the fuse modules still incorporate well known UltraSafe features such as IP20 protection, easy operating fuse extraction handles and an open fuse visual indication option. Adaptor marking strip

USCMA

Mersen UltraSafe Fuse Modules (USFM) have a unique, compact design suited for use with 45mm wide IEC contactors. These modules also offer other features not found on other class CC and midget UltraSafe fuseholders such as an auxiliary contact option. When the auxiliary is wired to an adjacent contactor the load is dropped out by the contactor immediately once the fuse extractor handle is opened. Additionally, the fuse module features padlock capabilities, compact bus bars for line side terminations, and tool free removal from DIN rail. Yet the fuse modules still incorporate well known UltraSafe features such as IP20 protection, easy operating fuse extraction handles and an open fuse visual indication option. Adaptor marking strip
Mersen UltraSafe Fuse Modules (USFM) have a unique, compact design suited for use with 45mm wide IEC contactors. These modules also offer other features not found on other class CC and midget UltraSafe fuseholders such as an auxiliary contact option. When the auxiliary is wired to an adjacent contactor the load is dropped out by the contactor immediately once the fuse extractor handle is opened. Additionally, the fuse module features padlock capabilities, compact bus bars for line side terminations, and tool free removal from DIN rail. Yet the fuse modules still incorporate well known UltraSafe features such as IP20 protection, easy operating fuse extraction handles and an open fuse visual indication option. Blank marking strip

USCM0

Mersen UltraSafe Fuse Modules (USFM) have a unique, compact design suited for use with 45mm wide IEC contactors. These modules also offer other features not found on other class CC and midget UltraSafe fuseholders such as an auxiliary contact option. When the auxiliary is wired to an adjacent contactor the load is dropped out by the contactor immediately once the fuse extractor handle is opened. Additionally, the fuse module features padlock capabilities, compact bus bars for line side terminations, and tool free removal from DIN rail. Yet the fuse modules still incorporate well known UltraSafe features such as IP20 protection, easy operating fuse extraction handles and an open fuse visual indication option. Blank marking strip

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.