Mersen J301285 - Square Body High-Speed Fuse Protistor® Size 70 aR 1000VAC IEC 1100VAC UL 500A With Striker Flush ends metric threads
Mersen

J301285

Alternate Item Number: PC70UD10C500TF

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Specification Sheet

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Overview

The Mersen J301285 is a high-speed fuse-link from the Protistor® series, specifically engineered for advanced semiconductor protection in AC applications. This Size 70 fuse-link features an aR (ultra-fast acting) characteristic, making it ideal for safeguarding sensitive components like diodes, thyristors, GTO's, and IGBT devices. With a rated voltage of 1000VAC according to IEC standards and 1100VAC according to UL standards, and a rated current of 500A, this fuse provides robust protection for power conversion equipment. The square body design with flush ends and metric threads ensures compatibility with various mounting configurations. Constructed with pure silver die-cut elements embedded in solidified sand, the Protistor® fuse-links offer superior arcing control, resulting in a lower I²t and a high interrupting rating of 126 kA. All contact surfaces are silver-plated, and non-magnetic hardware is utilized to maintain performance integrity. This model is equipped with a striker for integration with trip-indicating systems. The Mersen J301285 is designed for applications requiring precise and rapid overcurrent protection, minimizing damage to valuable semiconductor assets. Its construction prioritizes reliability and performance in demanding electrical environments. Key specifications include a pre-arcing I²t of 4730 A²s and a clearing I²t at rated voltage of 38000 A²s, with a power dissipation of 56W at rated current. The package weight is 0.36 kg with a package quantity of 3.
  • Mersen Protistor® Size 70 aR High-Speed Fuse-Link
  • Rated Voltage: 1000VAC (IEC) / 1100VAC (UL)
  • Rated Current: 500A
  • Ultra-fast acting (aR) for semiconductor protection
  • Square body with flush ends and metric threads, includes striker

Specifications

AC Voltage Rating
1100 V
Amperage Rating
500 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
End Contact with Threaded Holes
Connection Type
metric threads
Current Rating
500 A
Material
Silver, Sand
Mounting
Bolted
Mounting Type
Flush ends
Series
Protistor® aR
Size
2.91 x 1.57 x 1.95 in
Size
74 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
1100 V
Voltage Rating
1000 VAC
Wattage
83 W
Package Dimensions (L x W x H)
2.91 in x 1.57 in x 1.95 in
Package Dimensions (L x W x H)
74 mm x 39.8 mm x 49.5 mm
Package Weight (Imperial)
0.747 lb
Package Weight (Metric)
0.339 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.