Mersen T1200042 - Photovoltaic fuse gPV 1500VDC IEC 1500VDC UL Size 3L 450A With With DIN Type Blades For Direct Mount
Mersen

T1200042

Alternate Item Number: HP15NH3LGPV450B


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Specification Sheet

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Overview

The Mersen SKU T1200042 is a high-quality photovoltaic (PV) fuse, specifically engineered for the protection of photovoltaic systems. This gPV fuse link, part of the HelioProtection® HP15NH series, is designed for the critical task of protecting cables within a PV group of chains when a short circuit occurs in a panel, functioning as a main fuse. This HelioProtection® main fuse range expands Mersen's PV fuse link offerings, available in 1XL/2XL/3L sizes with worldwide acceptance. It operates at a maximum voltage of 1500VDC and a rated current of 450A, complying with both IEC 60269-6 and UL 2579 PV standards. The fuse features DIN Type Blades for direct mounting, ensuring a secure and reliable connection. Its robust construction is built for enhanced system longevity and withstands continuous temperature and current cycling. The Mersen HP15NH series is designed for low fault current interrupting capability, with a minimum breaking capacity of 1.35 times the fuse rated current value, enabling safe circuit interruption under typical low ground fault current conditions produced by PV arrays. This particular model is of Size 3L, indicating its physical dimensions and capacity. Protect your off-grid or grid-tied PV system from unexpected ground faults and string faults with Mersen’s reliable HelioProtection® fuse line. Manufactured in the US.
  • Mersen HelioProtection® HP15NH series photovoltaic fuse
  • 1500VDC rated voltage for high-voltage PV systems
  • 450A rated current for robust protection
  • Size 3L with DIN Type Blades for direct mounting
  • Complies with IEC 60269-6 and UL 2579 PV standards

Specifications

Amperage Rating
450 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
Connection Type
DIN Type Blades
Current Rating
450 A
DC Voltage Rating
1500 V
Mounting
Direct Mount
Mounting Type
Direct Mount
Series
HP15NH
Size
3L
Size
8.07 x 2.76 x 2.91 in
Size
205 x 70 x 74 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 Available in 3 versions: plain blade, direct mounted, direct mounted with striker
Standard
IEC 60269-6 RoHS compliance UL 248-19 for fuses (pending for 1XL, 2XL) (E358319, Volume 1, Section 1) UL 4248-19 for fuseholders, Photovoltaic (E362644 Volume 1)
Sub Brand
HelioProtection®
Type
Photovoltaic Fuses
Voltage Rating
1500 VDC
Package Dimensions (L x W x H)
8.07 in x 2.76 in x 2.91 in
Package Dimensions (L x W x H)
205 mm x 70 mm x 74 mm
Package Weight (Imperial)
4.365 lb
Package Weight (Metric)
1.980 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.