Mersen W300652 - Square Body High-Speed Fuse Protistor® Size 70 aR 1250VAC IEC 1300VAC UL 63A With Striker Slotted Blades long
Mersen

W300652

Alternate Item Number: A130UD70LI063


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Overview

The Mersen Protistor® W300652 is a high-speed fuse designed for semiconductor protection in power conversion equipment. This Size 70 aR fuse-link operates at 1250VAC (IEC) and 1300VAC (UL), with a rated current of 63A. Engineered with pure silver, die-cut elements embedded in solidified sand, it delivers superior arc control for lower I²t and high interrupting ratings. The square body design ensures compatibility with multiple mounting styles, including DIN110 slotted blades and optional striker for trip-indicator activation. All contact surfaces are silver-plated, and hardware is non-magnetic for enhanced reliability. With a breaking capacity of 126kA and power dissipation of 26W at rated current, this fuse-link is ideal for protecting diodes, thyristors, GTOs, and IGBTs in demanding applications. The W300652 is manufactured in the US and distributed by Gross Automation. Key specifications include pre-arcing I²t of 210 A²s, clearing I²t of 1680 A²s, and a package weight of 0.36 kg. Its compact design and high performance make it a critical component in modern power electronics, ensuring optimal protection and operational efficiency.
  • Rated current: 63A, voltage: 1250VAC (IEC) / 1300VAC (UL)
  • Pre-arcing I²t: 210 A²s, clearing I²t: 1680 A²s
  • Breaking capacity: 126kA, power dissipation: 26W at rated current
  • Square body design with DIN110 slotted blades and optional striker
  • Pure silver elements embedded in solidified sand for superior arc control

Specifications

AC Voltage Rating
1300 V
Amperage Rating
63 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
Slotted Blades
Connection Type
Slotted Blades
Current Rating
63A
Material
Pure silver, Sand, Non-magnetic hardware
Material
Silver
Material
Silver, Sand
Mounting
Bolted
Mounting Type
Square Body
Mounting Type
Long
Series
Protistor®
Size
6 x 1.57 x 1.95 in
Size
152.4 x 39.8 x 49.5 mm
Size
Size 70
Special Features
Multiple body sizes and terminals or blades combination aR Class according to VDE 636-23 and IEC 60269-4 Very low I²t for improved semiconductor protection Ultra fast acting Current limiting Superior cycling capability Increased technical performances: higher ratings and reduction in volume and weight
Standard
IEC 60269-4 Compliance UL/CSA Recognized E76491 CCC GB 13539.4 for Asian market only
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
1250VAC/1300VAC
Voltage Rating
1300 V
Voltage Rating
1250VAC / 1300VAC
Wattage
26 W
Package Dimensions (L x W x H)
6 in x 1.57 in x 1.95 in
Package Dimensions (L x W x H)
152.4 mm x 39.8 mm x 49.5 mm
Package Weight (Imperial)
0.830 lb
Package Weight (Metric)
0.377 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.