Mersen F1017203 - High-Speed Cylindrical Fuse Protistor® Size 14x51 gR 690VAC IEC 20A
Mersen

F1017203

Alternate Item Number: FR14GR69V20


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Specification Sheet

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Overview

The Mersen Protistor® F1017203 is a high-speed cylindrical fuse designed for the critical protection of power semiconductors. This fuse complies with IEC 60269-1 and IEC 60269-4 standards, ensuring reliable performance in demanding applications. Rated for 690VAC and 20A, it offers an extremely high interrupting rating, crucial for safeguarding sensitive electronic components from overcurrents and short circuits. The 14x51mm size is a standard for many semiconductor protection applications. This specific model, SKU F1017203, is part of Mersen's Protistor® series, known for its fast-acting characteristics. It features a gR classification, indicating its suitability for semiconductor protection. Key specifications include a rated voltage of 690VAC (IEC) and a current rating of 20A. The pre-arcing I²t is 21.7 A²s, and the clearing I²t at rated voltage is 160 A²s. Its rated breaking capacity is 160 kA, providing robust protection against severe fault conditions. The power dissipation at rated current is 5.5 W. Manufactured in the USA, this fuse is built to exacting standards for industrial use. It is available with or without a trip-indicator, offering flexibility in system monitoring. The Protistor® series is engineered for applications where rapid fault clearing is paramount, such as in motor drives, inverters, and power supplies.
  • Mersen Protistor® size 14x51 gR fuse for semiconductor protection
  • Rated Voltage: 690VAC (IEC)
  • Rated Current: 20A
  • Extremely high interrupting rating: 160 kA
  • Complies with IEC 60269-1 and IEC 60269-4 standards

Specifications

AC Voltage Rating
690 V
Amperage Rating
20 A
Brand Name
Mersen
Case
Ceramic
Connection
Ferrule
Mounting
Clip
Size
2.01 x 0.56 in
Size
51 x 14.3 mm
Special Features
IEC standard 60269-4 compliant UL 248-13 compliant gR class Clearing all overloads Improved safety and protection Enabling selective coordination among all Distribution circuit fuses With or without trip-indicator
Standard
IEC 60269-4 UL Recognized UL 248-13 CCC GB 1539.4 RoHS compliant
Sub Brand
Protistor®
Type
IEC High-Speed Cylindrical Fuse-Links AC Protection
Voltage Rating
690 V
Wattage
4.8 W
Package Dimensions (L x W x H)
2.01 in x 0.56 in x 0.56 in
Package Dimensions (L x W x H)
51 mm x 14.3 mm x 14.3 mm
Package Weight (Imperial)
0.044 lb
Package Weight (Metric)
0.020 kg
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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.