Mersen S1204181 - Photovoltaic fuse gG Size NH3 250A With Double indicator With Plain Blades For Clip
Mersen

S1204181

Alternate Item Number: NH3GG80V250

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Overview

The Mersen S1204181 is a gG type photovoltaic fuse-link designed for robust protection of solar energy systems. Engineered by Mersen, this NH3 size fuse operates at 800VAC and has a nominal current rating of 250A. It features a full-range breaking capacity, capable of interrupting any fault current from overloads up to its breaking capacity, making it suitable for use as a standalone protection device. The fuse is equipped with a double indicator for clear visual confirmation of operation and plain blades for secure connection within compatible fuse holders. Its design is optimized for use with DC/800VAC solar inverters, providing essential safety and reliability for photovoltaic installations. This fuse is compliant with IEC 60269-6 and UL 2579 PV standards, ensuring adherence to industry safety requirements. The Mersen S1204181 offers reliable protection for cables and equipment in photovoltaic arrays, contributing to the longevity and operational integrity of solar power systems. Its construction ensures it can withstand continuous temperature and current cycling, crucial for the demanding conditions of PV applications. Proudly distributed by Gross Automation.
  • Mersen NH3 size photovoltaic fuse-link
  • 250A nominal current rating
  • 800VAC operating voltage
  • gG type with full-range breaking capacity
  • Double indicator for visual operation confirmation
  • Plain blades for secure connection
  • Designed for photovoltaic systems and DC/800VAC solar inverters
  • Compliant with IEC 60269-6 and UL 2579 PV standards

Specifications

AC Voltage Rating
800 V
Amperage Rating
250 A
Application
General purpose cable and line protection at 800VAC Solar installation AC combiner box
Brand Name
Mersen
Class
Photovoltaic
Connection
Plain Blades
Connection Material
Silver-Plated Copper
Interrupt Rating
120 kA
Mounting
Clip
Size
5.91 x 2.01 x 2.83 in
Size
150 x 51 x 72 mm
Special Features
Low fault current interrupting capability Temperature cycle withstand capability Durable construction for enhanced system longevity High efficiency with low power losses
Standard
IEC 60269-2 RoHS compliance
Sub Brand
HelioProtection®
Type
Photovoltaic Fuses
Type Of Indicators
Double indicator
Package Dimensions (L x W x H)
5.91 in x 2.01 in x 2.83 in
Package Dimensions (L x W x H)
150 mm x 51 mm x 72 mm
Package Weight (Imperial)
1.731 lb
Package Weight (Metric)
0.785 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.