Mersen B220525 - Fuse Base for High Voltage Fuse-links 7.2kVAC 50A M8 screws +micro
Mersen

B220525

Alternate Item Number: SI85-20190TRACM


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Specification Sheet

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Overview

The Mersen SKU B220525 is a fuse base designed for high voltage fuse-links, specifically rated for 7.2kVAC and 50A continuous current. This unit features M8 screw terminals for secure connections and is compatible with microswitch indicators. The catalog description highlights its application with Mersen's 7.2kV R-Rated Amp-Trap Series fuses, which have a 12.5" (317 mm) clip center and a barrel diameter size D (3"). These fuses offer a continuous amp rating of 50A at 40°C and a minimum interrupting rating of 50kA at 7.2kV. The fuse base is built for robust performance, withstanding sine vibrations across three main axes, including a constant displacement of x = 5 mm peak in the 2-16 Hz segment and a constant acceleration of γ = 5 g peak in the 16-250 Hz segment. This ensures reliable operation in demanding industrial environments. The product is manufactured by Mersen in the US. It is suitable for applications requiring high voltage fuse protection where reliable mounting and connection are critical. The base is designed to accommodate ferrule-type fuses, ensuring a secure fit for the specified fuse dimensions.
  • Rated for 7.2kVAC and 50A continuous current
  • Equipped with M8 screw terminals for secure connections
  • Compatible with microswitch indicators for fuse status
  • Designed for Mersen 7.2kV R-Rated Amp-Trap Series fuses
  • Vibration resistant for reliable operation in harsh environments

Specifications

AC Voltage Rating
7.2 kV
Amperage Rating
50 A
Application
SI 36x127 BS fuse holder may be used for rolling stock “TRAC” for SI 36x190 and SI 36x400 means that fuse holder may be used for rolling stock with reinforced fixing of clips on isolators
Brand Name
Mersen
Connection Type
M8 screws
Current Rating
50A
DC Voltage Rating
7.2 kV
Size
11.34 x 2.56 x 5.16 in
Size
288.04 x 65.02 x 131.06 mm
Size
36 x 190
Special Features
Sturdy assembly with very high collision withstand Mounting as base with or without microswitch Polyester isolators for all applications
Type
IEC HV Fuse Supports
Voltage Rating
7.2kVAC
Package Dimensions (L x W x H)
11.34 in x 2.56 in x 5.16 in
Package Dimensions (L x W x H)
288.04 mm x 65.02 mm x 131.06 mm
Package Weight (Imperial)
2.646 lb
Package Weight (Metric)
1.200 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.