Authorized Mersen Distributor
Mersen X081026 - Square Body High-Speed Fuse Protistor® Size 300 gR 1750VDC IEC 12A With Striker Plain Blades
More images

Mersen X081026 Square Body High-Speed Fuse Protistor® Size 300 gR 1750VDC IEC 12A With Striker Plain…

Alternate Item Number: D300GC17C12P


Documents & Media
Specification Sheet

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen Protistor® Size 300 gR (SKU: X081026) is a high-speed DC fuse designed for critical railway power and auxiliary circuit protection. Rated at 12A with a 1750VDC rating, this fuse provides ultra-fast response to overcurrent conditions, minimizing damage to sensitive semiconductor components during faults. The gR (gated fuse) classification ensures precise fault interruption with low I²t values (18600 kA²s clearing I²t at rated voltage), reducing thermal stress on protected equipment. With plain blade terminals for easy installation, this fuse-link is optimized for elevated operating temperatures typical in modern DC systems. Ideal for traction power systems, battery management, and auxiliary converters where DC fault currents must be interrupted rapidly without nuisance tripping. Complies with IEC standards for semiconductor protection, ensuring reliability in harsh railway environments.
  • Rated 12A, 1750VDC for high-speed DC protection
  • gR classification ensures precise fault interruption with low I²t values
  • Plain blade terminals for easy installation
  • Compact square body design for tight panel spaces
  • Low I²t minimizes component damage during faults
  • Compact square body design for space-constrained panels
  • IEC compliant for semiconductor protection
  • Operates efficiently at elevated temperatures
  • High breaking capacity for reliable fault interruption

Specifications

Amperage Rating
12 A
Application
• Suburban lines: 1,5kVDC
Brand Name
Mersen
Case
Ceramic
Case Material
Ceramic
Connection
L Brackets
Connection Type
Plain Blades
Current Rating
12 A
DC Voltage Rating
1750 V
Mounting
Bolted
Mounting
Bolt
Series
Protistor®
Size
10.55 x 3.03 x 3.41 in
Size
268 x 77 x 86.5 mm
Size
Size 300
Size
10.55 x 3.03 x 3.41;268 x 77 x 86.5 in;mm
Special Features
Extremely fast acting Current limiting Very low I2t Worldwide acceptability Superior cycling ability
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links DC Protection
Type Of Indicators
Striker
Voltage Rating
1750 V
Voltage Rating
1750 V V
Wattage
11 W
Package Dimensions (L x W x H)
10.55 in x 3.03 in x 3.41 in
Package Dimensions (L x W x H)
268 mm x 77 mm x 86.5 mm
Package Weight (Imperial)
2.302 lb
Package Weight (Metric)
1.044 kg
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip

30323R

Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

Frequently Asked Questions

What is the breaking capacity of the Protistor DC fuses at 1750V DC?

The breaking capacity at 1750V DC is 30 kA with an L/R of 30 ms for gR Brackets and gR Blades.

What is the breaking capacity of the Protistor DC fuses at 2000V DC?

The breaking capacity at 2000V DC is 30 kA with an L/R of 30 ms for gR Brackets and gR Blades.

What are the available current ratings for gRC-gRE fuses in size 300?

The gRC-gRE fuses in size 300 are available from 6 to 125 A.

What are the available current ratings for gRC fuses in size 300 (Blades)?

The gRC fuses in size 300 (Blades) are available from 10 to 80 A.

What is the maximum AC voltage for these DC fuses?

The maximum AC voltage (50/60 Hz) is 1,700 V with a breaking capacity of 80 kA.

What is the weight of the size 300 gRC-gRE fuses?

The weight of the size 300 gRC-gRE fuses is 1150 g.

What is the weight of the size 300 gRC fuses (Blades)?

The weight of the size 300 gRC fuses (Blades) is 1050 g.

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.