Mersen 4/0CBR - Mersen CP cable protectors are special purpose limiters which are crimped or bolted to cables to clear and isolate faults quickly, increasing the reliability of service entrance and distribution runs. They are current-limiting with a 200,000A interrupting rating, yet will carry low cable overloads which are handled by standard protective devices. Cable protectors are rated in terms of cable size and material (Al or Cu). Heat shrinkable (HS) tubing can be specified for field installation. For cables smaller than 4/0, class J fuses can be used. 4/0 Boot for Cable to Buss Connection
Mersen

4/0CBR

Alternate Item Number: 782001935450

UPC: 782001935450

Contact for Pricing

Overview

The Mersen 4/0CBR CP Cable Protector (SKU: 4/0CBR) is a specialized current-limiting device designed to significantly enhance the reliability of service entrance and distribution electrical runs. Engineered by Mersen, this protector is crucial for quickly clearing and isolating electrical faults, thereby preventing cascading failures and minimizing downtime. With a robust 200,000A interrupting rating (200kA IR), the 4/0CBR effectively handles short-circuit conditions. Importantly, it is designed to carry low cable overloads that are typically managed by standard protective devices, ensuring operational continuity under normal load variations. This model is specifically rated for 4/0 AWG cable size and is available for both copper (CU) and aluminum (AL) conductors. When used with aluminum cable, an oxide inhibitor is included to ensure reliable termination. The 4/0CBR can be securely attached to cables via crimping or bolting, providing a direct termination point that can eliminate the need for separate cable lugs. Its dimensions are: A=7.06 in (179 mm), B=3.69 in (94 mm), C=3.38 in (86 mm), D=0.83 in (21 mm), E=1.33 in (33 mm), F=1.50 in (38 mm), and G=2.00 in (51 mm). For field installation, heat-shrinkable (HS) tubing is available as an option. The Mersen 4/0CBR operates at a maximum voltage of 600VAC. Placement recommendations include at the supply end of the cable in single-phase applications with one or two conductors per phase, and at both ends of each cable in other applications to ensure full isolation. This device is not ampere rated and is not intended for overload protection; its primary function is fault isolation during short circuits. The 4/0CBR is manufactured in the USA.
  • Quickly clears and isolates faults to increase system reliability.
  • 200,000A (200kA) interrupting rating for robust fault protection.
  • Carries low cable overloads managed by standard protective devices.
  • Rated for 4/0 AWG copper (CU) or aluminum (AL) cable.
  • Can be crimped or bolted, eliminating the need for cable lugs.

Specifications

Brand Name
Ferraz Shawmut
Material
Molded Rubber
Special Features
Fiberglass bodies for dimensional stability in harsh environments Catalog number stamped into terminal for permanent identification Crimp terminals for aluminum cable include oxide inhibitor Molded rubber boots available for insulation and protection Current-limiting device Permitted by code Available with various termination types for connection to cable, bus, offset bus and mole conductors
Type
Cable Protector
Voltage Rating
600 VAC
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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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.