Mersen H300042 - Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 500A With Striker Open Slot Blades
Mersen

H300042

Alternate Item Number: PC31UD69V500EF


Documents & Media
Specification Sheet

Contact for Pricing

Minimum Qty: 3

Multiplier: 3

*Contact for lower quantities*

Overview

The Mersen H300042 Protistor® fuse-link (SKU: H300042) is a high-speed aR fuse specifically engineered for semiconductor protection in power conversion equipment, including diode, thyristor, and IGBT applications. Rated at 500A and 690VAC (700VAC), this square body fuse-link is designed to meet IEC 700VAC and UL standards, ensuring global compatibility and reliable performance in industrial power systems. The fuse-link features die-cut elements embedded in solidified sand, which optimizes arcing characteristics to achieve lower I²t and high interrupting ratings, providing superior fault protection for sensitive semiconductor devices. The H300042 includes silver-plated contact surfaces and non-magnetic hardware, enhancing electrical conductivity, reducing corrosion, and improving long-term reliability in demanding environments. The striker open slot blades enable direct actuation of trip indicators or microswitches, allowing for remote fault signaling and system integration. Available in multiple mounting styles, it ensures seamless integration into existing infrastructure, offering flexibility for various industrial applications. With a compact square body design, the H300042 is optimized for easy installation and compatibility with power conversion equipment. Manufactured in Mexico, this fuse-link carries the UNSPSC code 39121628, confirming its classification within the industrial electrical protection category. Its precise fault interruption and thermal stability make it an ideal solution for protecting high-performance semiconductor devices in critical power systems.
  • High-speed aR fuse for semiconductor protection in power conversion equipment
  • Rated 500A at 690VAC/700VAC, compliant with IEC 700VAC and UL standards
  • Square body design with die-cut elements in solidified sand for optimized arcing
  • Silver-plated contacts and non-magnetic hardware for enhanced reliability
  • Striker open slot blades enable remote fault signaling via trip indicators or microswitches

Specifications

AC Voltage Rating
700 V
Amperage Rating
500 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
Open Slot Blades
Connection Type
Open Slot Blades
Current Rating
500 A
Material
Silver-plated
Material
Silver-plated contact surfaces, non-magnetic hardware, die-cut fuse elements embedded in solidified sand
Material
Silver-plated, non-magnetic hardware
Mounting
Bolted
Mounting Type
Multiple mounting styles
Mounting Type
Square Body
Series
Protistor®
Size
4.31 x 2.01 x 2.22 in
Size
109.4 x 51 x 56.5 mm
Size
Size 31
Special Features
Multiple body sizes and terminals or blades combination aR Class according to IEC 60269-4 and VDE 636-23 Very low I²t for improved semiconductor protection Ultra fast acting Current limiting Superior cycling capability
Standard
IEC 60269.4 Compliance UL/CSA Recognized E76491 CCC GB 13539.4 for Asian market only
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
690/700 VAC
Voltage Rating
700 V
Voltage Rating
690 VAC / 700 VAC
Voltage Rating
690VAC (IEC) / 700VAC (UL)
Wattage
72 W
Package Dimensions (L x W x H)
4.31 in x 2.01 in x 2.22 in
Package Dimensions (L x W x H)
109.4 mm x 51 mm x 56.5 mm
Package Weight (Imperial)
0.891 lb
Package Weight (Metric)
0.404 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.