Mersen HP6J300 - Photovoltaic fuse gPV 600VDC UL 300A With Blade For Clip or Bolted
Mersen

HP6J300

Alternate Item Number: HP6J300

UPC: 782001426705


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Overview

The Mersen HP6J300 is a high-quality photovoltaic (PV) fuse designed for robust protection in 600VDC DC Recombiner Boxes. Engineered by Mersen, this gPV fuse series is specifically built for the demanding requirements of photovoltaic systems, ensuring system longevity through its enhanced construction that withstands continuous temperature and current cycling. With a 600VDC rating and a low minimum breaking capacity of 1.35 times the fuse rated current (In), the HP6J300 provides safe and reliable circuit interruption even under typical low fault current conditions generated by PV arrays. This fuse is ideal for protecting off-grid and grid-tied PV systems from unexpected ground faults and line faults. Key specifications include a 300A current rating, 600VDC voltage rating, and a 10kA I.R. DC interrupting rating. Its UL Listed status to Standard UL2579 (File E333668) and CSA Component Certified status (C22.2) underscore its global acceptance and adherence to industry standards. The HP6J300 features UL Class J dimensions and a blade terminal for clip or bolted connections, offering versatile integration into combiner box applications, inverter DC input protection, and battery charge controllers. Mersen's HelioProtection® fuse line, including the HP6J300, offers dependable protection for your solar energy infrastructure.
  • Designed for 600VDC photovoltaic systems
  • 300A current rating with 10kA I.R. DC interrupting rating
  • Low minimum breaking capacity (1.35 x In) for safe fault interruption
  • Durable construction for enhanced system longevity and temperature cycle withstand
  • UL Listed to UL2579 (File E333668) and CSA Component Certified

Specifications

Amperage Rating
300 A
Application
Re-combiner (sub-combiner, array combiner, master combiner) applications Inverter DC input protection Battery charge controllers
Body Material
GMG
Brand Name
Mersen
Class
Photovoltaic
Connection
Blade
Connection Material
Silver-Plated Copper
DC Voltage Rating
600 V
Fuse Class
Photovoltaic
Interrupt Rating
10 kA
Mounting
Bolted;Clip
Mounting
Clip or Bolted
Size
7.13 x 2.13 in
Size
181.102 x 54.102 mm
Special Features
Smallest footprint in the industry UL class J dimensions Low fault current interrupting capability Durable construction for enhanced system longevity Temperature cycle withstand capability Guaranteed operation at temperature extremes Industry’s first UL Listed Solution Globally accepted
Standard
UL Listed to Standard UL248 File E333668 CSA Component Certified C22.2
Sub Brand
Helio Protection
Type
Photovoltaic Fuses
Type
Photovoltaic Fuses UL
Voltage Rating
600 VDC
Package Dimensions (L x W x H)
7.13 in x 2.13 in x 2.13 in
Package Dimensions (L x W x H)
181.102 mm x 54.102 mm x 54.102 mm
Package Weight (Imperial)
1.750 lb
Package Weight (Metric)
0.794 kg
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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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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.

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.