Mersen N085250 Square Body High-Speed Fuse Protistor® Size 121 gR 750VDC IEC 200A With Striker Flush…
Alternate Item Number: D121GC75V200TF
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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
- Size 121 gR Protistor® high-speed fuse-link
- 750 VDC (IEC) Rated Voltage
- 200 A Current Rating
- Extremely fast acting with very low I²t
- Square body with metric threads and striker
- Operates at elevated temperatures with lower watts loss (76W)
- Designed for semiconductor and DC circuit protection
- Compliant with IEC standards for high-speed fuses
Specifications
Amperage Rating | 200 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 ends metric threads |
Current Rating | 200A |
DC Voltage Rating | 750 V |
Mounting | Bolted |
Mounting Type | Square Body |
Series | Protistor® |
Size | Size 121 |
Size | Size 121 gR |
Size | 5.16 x 2.01 x 2.17 in |
Size | 131 x 51 x 55 mm |
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 | 750 V |
Wattage | 37.5 W |
Package Dimensions (L x W x H) | 5.16 in x 2.01 in x 2.17 in |
Package Dimensions (L x W x H) | 131 mm x 51 mm x 55 mm |
Package Weight (Imperial) | 1.940 lb |
Package Weight (Metric) | 0.880 kg |
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Frequently Asked Questions
What is the rated voltage for Protistor size 121 gR fuses?
The rated voltage for these fuses is 750 VDC according to IEC standards.
What is the ampere range for Protistor size 121 gR fuses?
The ampere range for these fuses is from 200 A to 250 A.
What is the breaking capacity of the Protistor size 121 gR fuse?
The rated breaking capacity DC for this fuse is 100 kA.
What is the power dissipation for a 200A Protistor size 121 gR fuse at rated current?
The power dissipation at rated current for a 200A fuse is 37.5 W.
What is the weight of the Protistor size 121 gR fuse with blade contacts?
The weight for the size 121 gR fuse with blade contacts is 1.02 kg.
What is the weight of the Protistor size 121 gR fuse with thread terminals?
The weight for the size 121 gR fuse with thread terminals is 0.88 kg.
What is the pre-arcing I²t for a 200A Protistor size 121 gR fuse?
The pre-arcing I²t for a 200A fuse is 11.85 kA²s.
What is the pre-arcing I²t for a 250A Protistor size 121 gR fuse?
The pre-arcing I²t for a 250A fuse is 18.05 kA²s.
What are the applications for Mersen DC Semiconductor fuse-links?
These fuse-links are used for protecting inverters, motor drives, UPS systems, and railway power circuits.
What is the speed characteristic of the Protistor size 121 gR fuse?
The speed characteristic for this fuse is gR.
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.