Mersen E330031 - The 690/700V Protistor® fuse-links provide maximum flexibility in equipment design and ultimate protection for small power conversion equipment. The Protistor® gR have been engineered to provide full range protection to eliminate all overloads and semiconductor fault. Fuses are assembled with pure silver, die-cut elements embedded in solidified sand, which helps control arcing characteristics for a lower I2t and high interrupting rating level. All contact surfaces are silver plated and all hardware is non-magnetic. Each fuse-link can be equipped with a low voltage trip-indicator which can operate a field mountable microswitch. 690 Volts 25 Amps 000 gRB D08 series.
Mersen

E330031

Alternate Item Number: 3605340360936

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Overview

The Mersen Protistor® 690/700V 25A gRB D08 fuse-link (SKU: E330031) is a high-speed semiconductor fuse designed for small power conversion equipment, including variable frequency drives (VFDs), uninterruptible power supplies (UPS), and other sensitive electronic systems. This fuse-link provides full-range protection, eliminating overloads and semiconductor faults while ensuring operational continuity in harsh industrial environments. Key specifications include a rated voltage of 690V AC (IEC) / 700V AC (UL), rated current of 25A, and a breaking capacity of 200 kA at 690V. The fuse-link features pure silver, die-cut elements embedded in solidified sand for superior arcing control, resulting in lower I²t values (26.8 A²s pre-arcing, 170 A²s total clearing) and minimized thermal stress on protected equipment. The gRB class complies with IEC 269-4 and VDE 636-23 standards, ensuring compatibility with German DIN 43653/00C and British BS 88-4 connections. Additional features include non-magnetic hardware to prevent magnetic interference, silver-plated contacts for optimal conductivity, and an optional low-voltage trip-indicator (minimum 20V) for system monitoring. The fuse-link can carry transformer magnetizing inrush current (25 times full load amperes for 0.01 seconds, 12 times for 0.1 seconds), making it suitable for inductive loads. All hardware is non-magnetic, and the fuse-link weighs approximately 8.8 grams with a package weight of 9.2 grams. Mersen’s Protistor® series is a trusted solution for power semiconductor protection, offering improved safety, selective coordination, and compliance with international standards. This fuse-link is ideal for manufacturers and integrators seeking reliable, high-performance protection for critical power conversion applications.
  • Rated voltage: 690V AC (IEC) / 700V AC (UL)
  • Rated current: 25A with breaking capacity of 200 kA
  • Full-range protection for overloads and semiconductor faults
  • Pure silver, die-cut elements for superior arcing control (I²t: 26.8 A²s pre-arcing, 170 A²s total clearing)
  • Non-magnetic hardware and silver-plated contacts for reliability
  • Optional low-voltage trip-indicator (minimum 20V) for system monitoring
  • Complies with IEC 269-4, VDE 636-23, DIN 43653/00C, and BS 88-4 standards
  • Suitable for inductive loads with high inrush current handling
  • Compact D08 size with package weight of 9.2 grams

Specifications

Amperage Rating
25 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Ferraz Shawmut
Current Rating
25 A
Material
Silver
Material
Silver, Sand
Series
gRB D08
Size
0
Special Features
gR Class according to IEC 60269-4 and VDE 636-23 Low I²t for improved semiconductor protection Extremely fast acting Eliminate all overloads Excellent cycling capability
Standard
IEC 60269-4 Compliance UL/CSA Recognized Component AC: UL Guide No. E76492
Sub Brand
Protistor
Type
Square Body High-Speed Fuse-Links AC Protection
Voltage Rating
690 VAC
Package Dimensions (L x W x H)
3.93 IN x 0.79 IN x 1.51 IN
Package Dimensions (L x W x H)
9.9822 cm x 20.066 mm x 3.8354 cm
Package Weight (Imperial)
0.290 L
Package Weight (Metric)
0.132 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 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 Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
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 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.