Mersen Z300218 - Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 500A With Striker Open Slot Blades
Mersen

Z300218

Alternate Item Number: PC33UD69V500EF


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Specification Sheet

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Overview

The Mersen Z300218 is a high-speed fuse-link from the Protistor® series, engineered for superior semiconductor protection in industrial power conversion systems. This square body fuse-link, SKU Z300218, features an aR (ultra-fast acting) classification, providing critical protection for diodes, thyristors, and IGBTs. It is rated for 690VAC (IEC) and 700VAC (UL) with a substantial 500A rated current (I n). The fuse-link boasts a high breaking capacity of 200 kA AC, ensuring it can safely interrupt fault currents. Its pre-arcing I²t is 110 kA²s, and clearing I²t at rated voltage is 264 kA²s, indicating rapid fault response and minimal energy let-through. Power dissipation at rated current is 88W. The Z300218 is designed with open slot blades for quick visual status indication and compatibility with various mounting configurations. Fuse elements are embedded in solidified sand to effectively control arcing, which contributes to its high interrupting ratings and reduced I²t values. All contact surfaces are silver-plated to ensure low resistance and long-term reliability. Non-magnetic hardware further enhances its durability. Optional low-voltage trip indicators are available for remote monitoring via field-mountable microswitches. Manufactured in the US, this fuse-link is ideal for applications demanding precise fault protection and high interrupting capacity, such as DC drives, AC drives, and power supplies. Its robust construction and precise performance make it a reliable choice for safeguarding sensitive semiconductor devices.
  • Mersen Protistor® Z300218 fuse-link for semiconductor protection
  • Rated 500A, 690VAC (IEC) / 700VAC (UL)
  • aR (ultra-fast acting) classification for sensitive devices
  • 200 kA AC rated breaking capacity
  • Square body design with striker open slot blades for visual indication

Specifications

_Family Code
136
_Family Description
Square Body SC Fuses
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 contact surfaces and non-magnetic hardware
Material
Silver-plated contact surfaces, non-magnetic hardware, solidified sand
Mounting
Bolted
Mounting Type
Square body, flexible mounting styles
Response Time
High-Speed
Series
Protistor®
Size
4.96 x 2.87 x 3.09 in
Size
126 x 73 x 78.5 mm
Size
Size 33
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
690VAC IEC 700VAC UL
Wattage
105 W
Package Dimensions (L x W x H)
4.96 in x 2.87 in x 3.09 in
Package Dimensions (L x W x H)
126 mm x 73 mm x 78.5 mm
Package Weight (Imperial)
1.878 lb
Package Weight (Metric)
0.852 kg
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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.