Mersen J220946 Square Body High-Speed Fuse Protistor® Size 123 gR 660VDC IEC 800A With Striker Flush…
Alternate Item Number: D123GB66V800TF
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Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Ultra-fast acting gR fuse-link for critical DC protection
- Rated 800A at 660VDC (IEC), suitable for up to 750VDC applications
- Very low I²t values minimize damage to protected components
- Square body design with flush-end metric threads for secure mounting
- Integrated striker for visual or mechanical fault indication
Specifications
Amperage Rating | 800 A |
Application | Protection of inverters Protection of motor drives Protection of UPS systems Railway power and auxiliary circuits Similar 750VDC or less equipments |
Brand Name | Mersen |
Case | Ceramic |
Connection | End Contact with Threaded Holes |
Connection Type | Flush Metric Threads |
Current Rating | 800 A |
DC Voltage Rating | 660 V |
Mounting | Bolted |
Mounting Type | Flush metric threads |
Series | Protistor® |
Size | 5.16 x 2.87 x 3.03 in |
Size | 131 x 73 x 77 mm |
Size | Size 123 |
Special Features | Multiple body sizes and terminals or blades combination Very low I²t Extremely fast acting Eliminate all overloads Excellent cycling capability |
Standard | IEC 60269-4 Compliance |
Sub Brand | Protistor® |
Type | Square Body High-Speed Fuse-Links DC Protection |
Type Of Indicators | Striker |
Voltage Rating | 660 V |
Package Dimensions (L x W x H) | 5.16 in x 2.87 in x 3.03 in |
Package Dimensions (L x W x H) | 131 mm x 73 mm x 77 mm |
Package Weight (Imperial) | 4.374 lb |
Package Weight (Metric) | 1.984 kg |
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Frequently Asked Questions
What is the rated voltage for Protistor size 123 gR fuses?
The rated voltage DC (IEC) for these fuses is 660 VDC and 750 VDC.
What is the ampere range for Protistor size 123 gR fuses?
The Ampere Range (A) for these fuses is from 500 A to 800 A.
What standards do these semiconductor protection fuses comply with?
These fuse-links comply with IEC 60269-4 standards.
What is the rated breaking capacity for these fuses?
The rated breaking capacity DC for these fuses is 100 kA.
What are the applications for these high-speed fuse-links?
These fuse-links are used for protection of inverters, motor drives, UPS systems, and railway power circuits.
What is the weight of the size 123 gR fuses with TTF terminals?
The weight of the size 123 gR fuses with TTF terminals is 1.98 kg.
What is the weight of the size 123 gR fuses with EF blade contacts?
The weight of the size 123 gR fuses with EF blade contacts is 2.1 kg.
What is the power dissipation at rated current for the 500A fuse?
The power dissipation at rated current (In) for the 500A fuse is 93.5 W.
What is the maximum I²t at 900V for the 500A fuse?
The maximum I²t @900V, L/R=40ms, IP=50In for the 500A fuse is 1000 kA²s.
What are the dimensions of the size 123 gR fuse body?
The dimensions for the size 123 gR fuse body are 131 ± 1.9 mm in length and Ø 46 mm in diameter.
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.