Mersen F1048667 - Photovoltaic fuse gPV 1000VDC IEC 1000VDC UL Size NH1 125A With DIN Type Blades For Direct Mount
Mersen

F1048667

Alternate Item Number: HP10NH1GPV125B

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Overview

The Mersen F1048667, SKU F1048667, is a gPV photovoltaic fuse designed for the critical protection of photovoltaic systems. Engineered to meet IEC 60269-6 and UL 2579 PV standards, this fuse operates at 1000VDC and features a 125A nominal current rating. Its NH1 size with DIN type blades ensures direct mounting compatibility, simplifying installation within combiner boxes and inverter DC inputs. The HelioProtection® HP10NH series, to which this fuse belongs, is specifically developed for safeguarding PV system cables against short circuits originating from solar panels. With a global acceptance in its size category, the F1048667 offers reliable protection for both off-grid and grid-tied PV systems, mitigating risks from ground faults and line faults. Key specifications include a rated voltage of 1000VDC, a nominal current of 125A, and a gPV class. The fuse exhibits a power dissipation of 7.4W at In (125A) and 7.2W at 0.7xIn, contributing to system efficiency. Its interrupting rating is 50kA DC. The dimensions for the NH1 size are 135mm (length), 70mm (width), 8mm (height), 63mm (depth), 68mm (center-to-center distance), 20mm (blade width), 40mm (blade length), 52.5mm (blade center to end), 39.5mm (blade center to start), and 66mm (overall width). This fuse is manufactured in the US.
  • Designed for photovoltaic (PV) system protection
  • 1000VDC rated voltage
  • 125A nominal current
  • NH1 size with DIN type blades for direct mounting
  • Compliant with IEC 60269-6 and UL 2579 PV standards

Specifications

Amperage Rating
125 A
Application
All photovoltaic applications Inverter DC input protection Re-combiner applications (sub combiner, array combiner, master combiner)
Brand Name
Mersen
Connection
DIN Type Blades
Connection Material
Silver-Plated Copper
DC Voltage Rating
1000 V
Mounting
Direct Mount
Size
5.31 x 1.56 x 2.19 in
Size
135 x 39.5 x 55.5 mm
Special Features
Global acceptance Low fault current interrupting capability Temperature cycle withstand capability Durable construction for enhanced system longevity High efficiency with low power losses Small footprint Available in two versions: Plain Blade & Direct Mounting
Standard
IEC 60269-6 UL 2579 RoHS compliance
Sub Brand
HelioProtection®
Type
Photovoltaic Fuses
Package Dimensions (L x W x H)
5.31 in x 1.56 in x 2.19 in
Package Dimensions (L x W x H)
135 mm x 39.5 mm x 55.5 mm
Package Weight (Imperial)
0.882 lb
Package Weight (Metric)
0.400 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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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.