Mersen S1022458 Square Body High-Speed Fuse Protistor® Size 70 gR 350VDC IEC 400VDC UL 350A With Striker
Alternate Item Number: D70GB35V350ESF
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Overview
- Mersen Protistor® Size 70 gR fuse-link
- 350A current rating
- 350VDC / 400VDC (IEC) voltage rating
- Square body design with striker for trip indication
- gR Class according to IEC 60269-4 and VDE 636-23
Specifications
Amperage Rating | 350 A |
Application | Protection of inverters, motor drives, UPS systems and similar 600V or less equipments. |
Brand Name | Mersen |
Case | Ceramic |
Connection Type | Silver-plated contact surfaces |
Current Rating | 350A |
DC Voltage Rating | 400 V |
Material | Pure silver, sand, silver-plated |
Material | Pure silver, solidified sand |
Mounting | Bolted |
Mounting Type | Non-magnetic hardware |
Mounting Type | Square Body, Multiple Mounting Styles |
Series | Protistor® |
Size | Size 70 gR |
Size | 5.25 x 1.57 x 1.95 in |
Size | 133.4 x 39.8 x 49.5 mm |
Size | Size 70 |
Special Features | Multiple body sizes and terminals or blades combination gR Class according to IEC 60269-4 and VDE 636-23 Low I²t for improved semiconductor protection Extremely fast acting Eliminate all overloads Excellent cycling capability |
Standard | IEC 60269-4 Compliance UL/CSA Recognized E76491 CCC GB 1359.4 |
Sub Brand | Protistor® |
Type | Square Body High-Speed Fuse-Links DC Protection |
Type Of Indicators | Striker |
Voltage Rating | 400 V |
Voltage Rating | 350VDC/400VDC |
Wattage | 47 W |
Package Dimensions (L x W x H) | 5.25 in x 1.57 in x 1.95 in |
Package Dimensions (L x W x H) | 133.4 mm x 39.8 mm x 49.5 mm |
Package Weight (Imperial) | 0.882 lb |
Package Weight (Metric) | 0.400 kg |
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Frequently Asked Questions
What is the voltage range for Protistor size 70 gR fuses?
The voltage range for these fuses is from 350 to 600 VDC according to IEC standards.
What is the current rating range for these fuses?
The Ampere Range for these Protistor fuses is from 50 A to 350 A.
What class does the Protistor size 70 gR belong to?
The Protistor size 70 gR is classified as gR Class according to IEC 60269-4 and VDE 636-23.
What are the main applications for these fuses?
These fuses are designed for the protection of inverters, motor drives, UPS systems, and similar equipment rated at 600V or less.
What type of semiconductor devices do these fuses protect?
These fuses are engineered to provide protection for semiconductors such as diodes, thyristors, GTO's, and IGBT devices.
What is the pre-arcing I²t value for a 50A fuse?
The pre-arcing I²t value for a 50A Protistor size 70 gR fuse is 118 A²s.
What is the power dissipation at rated current for a 100A fuse?
The power dissipation at the rated current for a 100A Protistor size 70 gR fuse is 23 W.
Does this product have a trip indicator option?
Yes, all fuse-links can be equipped with a low voltage trip-indicator which can operate a field mountable microswitch.
What are the dimensions of the Size 70 gR TTF fuse?
The Size 70 gR TTF fuse has dimensions including a height of 74 ± 1.2 mm and a diameter of 26 mm.
What are the dimensions of the Size 70 gR EF fuse?
The Size 70 gR EF fuse has dimensions including a height of 123.4 -1.1 mm and a width of 55.3 mm.
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.