Mersen S300626 - Square Body High-Speed Fuse Protistor® Size 72 aR 1000VAC IEC 1100VAC UL 700A With Striker Open Slot Blades
Mersen

S300626

Alternate Item Number: PC72UD10C700EF


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Overview

The Mersen S300626 Protistor® square body high-speed fuse-link (SKU: S300626) is specifically engineered for the critical task of semiconductor protection within power conversion equipment. This ultra-fast acting fuse-link boasts a substantial 700A current rating and is designed for operation at 1000VAC, with an IEC rating of 1100VAC and UL rating of 700A. Its aR classification ensures precise and rapid fault interruption, safeguarding sensitive semiconductor devices such as diodes, thyristors, and IGBTs from damaging overcurrent events. The versatile square body design accommodates multiple global mounting styles, facilitating flexible installation in various configurations. Internally, the fuse elements are precision die-cut and embedded in solidified sand, a method that effectively controls arc expansion and propagation, resulting in a lower I²t value and a high interrupting rating. All contact surfaces are silver-plated to minimize electrical resistance and ensure optimal conductivity. The hardware used is non-magnetic, preventing any potential interference with the fuse's operation. For enhanced system monitoring, optional low-voltage trip indicators are available, which can be fitted with field-mountable microswitches for remote fault signaling.
  • Mersen Protistor® Size 72 aR fuse-link
  • 700A current rating, 1000VAC / 1100VAC voltage rating
  • Designed for semiconductor protection (diodes, thyristors, IGBTs)
  • Square body for flexible mounting, with striker and open slot blades
  • Meets IEC and UL standards for global compliance

Specifications

AC Voltage Rating
1100 V
Amperage Rating
700 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
Open Slot Blades
Connection Type
Open Slot Blades
Current Rating
700 A
Material
Silver-plated contact surfaces, non-magnetic hardware, die-cut elements embedded in solidified sand
Material
Silver-plated, non-magnetic hardware
Material
Silver, Sand
Mounting
Bolted
Mounting Type
Multiple worldwide mounting styles
Mounting Type
Square Body
Mounting Type
Square Body (Multiple Mounting Styles)
Series
Protistor® aR
Series
Protistor®
Size
5.88 x 2.32 x 2.48 in
Size
149.4 x 59 x 63 mm
Size
Size 72
Size
Protistor® Size 72
Special Features
Multiple body sizes and terminals or blades combination aR Class according to IEC 60269-4 and VDE 636-23 Very low I²t for improved semiconductor protection Ultra fast acting Current limiting Superior cycling capability
Standard
IEC 60269-4 Compliance UL/CSA Recognized E76491 CCC GB 13539.4 for Asian market only
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
1100 V
Voltage Rating
1000 VAC/1100 VAC
Wattage
140 W
Package Dimensions (L x W x H)
5.88 in x 2.32 in x 2.48 in
Package Dimensions (L x W x H)
149.4 mm x 59 mm x 63 mm
Package Weight (Imperial)
1.671 lb
Package Weight (Metric)
0.758 kg
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9F61 Size B Clips 1.6in

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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.

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.

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.