Mersen USFMBB3 - USFM - BB 600V 3-Pole B3 phases
Mersen

USFMBB3

Alternate Item Number: USFMBB3

UPC: 782001382131

Contact for Pricing

Overview

The Mersen UltraSafe Fuse Module USFMBB3 is engineered for superior safety and efficiency in industrial electrical applications. Designed to seamlessly integrate with 45mm wide IEC contactors, this 3-pole module provides robust protection for critical circuits. Its compact footprint and DIN rail mounting capability simplify installation and optimize panel space, making it an ideal choice for panel builders and designers seeking reliable and space-saving solutions. The USFMBB3 embodies Mersen's commitment to safety with its well-known UltraSafe features, including IP20 protection for enhanced touch safety and an open fuse visual indication option for quick status checks. The easy-to-operate fuse extraction handles further contribute to safe and convenient fuse replacement. For added operational control and safety, an optional auxiliary contact (USFMAC111) can be integrated. When wired to an adjacent contactor, this auxiliary contact ensures the load is immediately dropped out by the contactor if an attempt is made to open the fuse extractor handle, preventing accidental exposure to live circuits. Key benefits of the Mersen USFMBB3 include: * **Enhanced Safety:** IP20 protection, touch-safe design, and optional auxiliary contact for immediate load disconnection. * **Space Efficiency:** Compact design compatible with 45mm IEC contactors, reducing panel real estate. * **Simplified Installation:** Tool-free removal from DIN-rail and integrated compact busbars for line-side terminations. * **Visual Indication:** Open fuse visual indication for easy status monitoring. * **Versatile Application:** Suitable for a wide range of industrial control and power distribution panels. This fuse module is built to Mersen's high standards, ensuring durability and reliable performance in demanding environments. Its robust construction and thoughtful design features make it a trusted component for protecting electrical systems. Whether used in UL 508 panels, solar string combiner boxes, or general control and power distribution panels, the USFMBB3 offers a secure and efficient method for fuse protection. Mersen's dedication to quality and innovation is evident in every aspect of the UltraSafe Fuse Module line, providing peace of mind and operational continuity for industrial facilities.
  • Mersen UltraSafe Fuse Module USFMBB3
  • Designed for 45mm wide IEC contactors
  • 600V, 3-pole configuration
  • IP20 protection and easy fuse extraction
  • Optional auxiliary contact for enhanced safety

Specifications

AC Voltage Rating
600 V
Amperage Rating
30 A
Amperage Rating
63 A
Application
Primarily for motor circuits to replace circuit breakers for higher SCCR ratings Other circuits up to 600 volts for control circuits, transformers, etc. Non-load disconnect Padlock compliance RECOMMENDED FUSE USAGE: USM use with: ATQ, ATM(1), A6Y-2B, A25Z-2, TRM, OTM, A13X-2, A60Q-2, DCT(1) USCC use with: ATDR, ATMR(1), ATQR (1) Recommended for DC applications
Application
Primarily for replacement of circuit breakers in motor circuits to achieve higher SCCR Circuits up to 600V for motors, control, transformers, etc… Applications requiring lock-out / tag-out procedures
Brand Name
Ferraz Shawmut
Class
Accessory
Connection Type
DIN rail mounting with integrated busbars
DC Voltage Rating
600 V
IP Rating
IP20
Mounting Type
DIN Rail
Poles
3-pole
Series
UltraSafe Fuse Module
Short Circuit Rating
200 kA
Size
4.65 x 0.51 x 0.8 in
Special Features
Dedicated 3-pole fuse module Finger-safe Compact footprint with 45mm width Auxiliary contact option (1NO/1NC) Ability to padlock in OPEN position with 1/4" shank diameter DIN-rail mount with tool free removal Quick, easy fuse change Optional indicator lights
Special Features
Dedicated 3-pole fuse module Compact footprint - 45mm width IP20 Finger-safe Auxiliary contact option (1NO/1NC) Ability to padlock in Open position with 1/4" diameter shank DIN-rail mount with tool free removal Optional visual blown fuse indication
Standard
UL Listed to standard 4248-4, File E52283 CSA Certified C22.2, Class 6225, File 32169 UL Listed to standard 508, File E336456 UL Recognized Component to standard 4248-1, File E319605 UL Recognized Component to standard 4248-14, File E52283 CSA Certified C22.2, Class 6225, File 32169 IEC Compliant to 60269-2-1, 60947-3
Standard
USFMCC (Class CC Fuses) UL Listed, guide IZLT, File E52283 CSA Certified C22.2, class 6225 01, File 32169 USFM10 (Midget 10x38mm Fuses) UL Recognized Component, guide IZLT2, File E52283 CSA Certified C22.2, Class 6225 01, File 32169 IEC Certified 60269-1, 60947-3 (690VAC, 32A, 120kA)
Type
UltraSafe
Type
Busbar
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
5.16 IN x 1.26 IN x 0.52 IN
Package Dimensions (L x W x H)
13.1064 cm x 3.2004 cm x 13.208 mm
Package Weight (Imperial)
0.800 L
Package Weight (Metric)
0.363 kg
USFM - BB 600V 3-Pole C1 phases

USFMBBC1

USFM - BB 600V 3-Pole C1 phases
For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.

LRU-2621R

For use with Littelfuse FLNR_ID/FLSR_ID, IDSR, LLNRK/LLSRK and KLNR/KLSR series fuses.

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.