Mersen Y079440 - Square Body High-Speed Fuse Protistor® Size 70 aR 1200VDC IEC 80A With Striker L Brackets
Mersen

Y079440

Alternate Item Number: D70SF120V80QF


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Specification Sheet

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Overview

The Mersen Y079440 Protistor® Size 70 aR is a high-speed fuse-link engineered for robust DC power protection. This fuse is rated for 1200 VDC and 80 A, providing rapid fault interruption crucial for sensitive equipment. It features a pre-arcing I²t of 470 A²s and a clearing I²t of 3780 A²s, ensuring minimal damage during short circuits. The square body design incorporates DIN 110 blades and striker L brackets for straightforward mounting and integration into industrial DC systems. With a rated breaking capacity of 126 kA at its rated voltage, it offers substantial protection against overcurrents. The power dissipation at rated current is 27 W, contributing to efficient thermal management. Manufactured in the US and certified to IEC standards, this Mersen fuse is ideal for semiconductor protection in traction power, battery management, and industrial DC distribution applications where reliability and precise fault isolation are paramount. SKU: Y079440.
  • Mersen Protistor® Size 70 aR High-Speed Fuse-Link
  • Rated 1200 VDC, 80 A
  • 126 kA Rated Breaking Capacity
  • DIN 110 Blades with Striker L Brackets
  • Ideal for DC semiconductor protection

Specifications

Amperage Rating
80 A
Application
Protection of inverters Protection of motor drives Protection of UPS systems Railway power and auxiliary circuits ESS Battery Rack protection up to 1500 VDC
Brand Name
Mersen
Case
Ceramic
Connection Type
L Brackets
Current Rating
80 A
DC Voltage Rating
1200 V
Mounting
Bolted
Mounting Type
Square Body
Series
Protistor®
Size
6.42 x 1.5 x 2.47 in
Size
163 x 38 x 62.7 mm
Size
Size 70
Special Features
Extremely fast acting Excellent cycling capability Very low I²t Worldwide acceptability Current Limiting Superior Cycling Ability
Standard
IEC 60269-1 and IEC 60269-4 Compliance DC UL recognized component UL file E76491 - 20A-215A, @1200VDC, L/R 10ms, 100KA - 20A-215A, @1500VDC, L/R 1-3ms, 100KA GB/T 13539.4-2016
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
1200 V
Wattage
37.5 W
Package Dimensions (L x W x H)
6.42 in x 1.5 in x 2.47 in
Package Dimensions (L x W x H)
163 mm x 38 mm x 62.7 mm
Package Weight (Imperial)
1.499 lb
Package Weight (Metric)
0.680 kg
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Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.

LCC5

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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.