Mersen J301078 - Square Body High-Speed Fuse Protistor® Size 33 aR 550VAC IEC 600VAC UL 2000A With Striker Slotted Blades long
Mersen

J301078

Alternate Item Number: A060UD33LI2000


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Specification Sheet

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Overview

The Mersen J301078 is a high-speed fuse-link from the Protistor® series, specifically designed for semiconductor protection. This Size 33 fuse features a square body and slotted blades, engineered for robust performance in demanding applications. It boasts a rated current of 2000A and a voltage rating of 550 VAC (IEC) / 600 VAC (UL). The fuse-link offers exceptional protection for sensitive semiconductor devices like diodes, thyristors, and IGBTs, ensuring operational integrity and preventing catastrophic failures. Constructed with die-cut elements embedded in solidified sand, it achieves superior arcing control, resulting in a low I²t value of 950 kA²s (pre-arcing) and 4500 kA²s (clearing I²t at rated voltage). This contributes to a high interrupting rating of 200 kA, safeguarding equipment against severe overcurrents and short circuits. The Mersen J301078 is built with premium materials, including silver-plated contact surfaces and non-magnetic hardware, ensuring reliable conductivity and preventing unwanted magnetic interference. Its power dissipation at rated current is 290 W, and it weighs approximately 0.88 kg. This fuse-link is compatible with a low voltage trip-indicator, allowing for integration with field-mountable microswitches for enhanced monitoring and control systems. Ideal for power conversion equipment, motor drives, and industrial automation, the Protistor® series provides maximum flexibility in equipment design and ultimate protection for critical components.
  • Mersen Protistor® Size 33 aR high-speed fuse-link
  • 2000A rated current, 550 VAC (IEC) / 600 VAC (UL) voltage rating
  • Slotted blade connection type for secure mounting
  • High interrupting capacity of 200 kA for robust protection
  • Designed for semiconductor protection (diodes, thyristors, IGBTs)

Specifications

AC Voltage Rating
600 V
Amperage Rating
2000 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
2000A
Material
Silver plated and non-magnetic hardware
Mounting
Bolted
Mounting Type
Multiple worldwide acceptable mounting styles
Series
Protistor®
Size
5.28 x 2.87 x 3.09 in
Size
134 x 73 x 78.5 mm
Special Features
Multiple body sizes and terminals or blades combination aR Class according to IEC 60269-4 and VDE 636-23 Very low I²t for improved semiconductor protection Ultra fast acting Current limiting Superior cycling capability
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
600 V
Voltage Rating
550VAC
Wattage
290 W
Package Dimensions (L x W x H)
5.28 in x 2.87 in x 3.09 in
Package Dimensions (L x W x H)
134 mm x 73 mm x 78.5 mm
Package Weight (Imperial)
1.863 lb
Package Weight (Metric)
0.845 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.