Mersen A300219 - Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 550A With Striker Open Slot Blades
Mersen

A300219

Alternate Item Number: PC33UD69V550EF


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Overview

The Mersen A300219 is a Size 33 Protistor® square body fuse-link, engineered for ultra-fast acting protection of semiconductor devices such as diodes, thyristors, and IGBTs. This aR rated fuse operates at 690VAC according to IEC standards and 700VAC according to UL standards, with a current rating of 550A. It features open slot blades for mounting and is equipped with a striker mechanism. The fuse-links are constructed with die-cut elements embedded in solidified sand to manage arcing characteristics, resulting in a lower I²t value and a high interrupting rating. All contact surfaces are silver-plated, and hardware is non-magnetic to ensure optimal performance and longevity. For enhanced operational feedback, each fuse-link can be fitted with a low voltage trip-indicator that can activate a field-mountable microswitch. This design provides maximum flexibility in equipment design and ultimate protection for power conversion equipment. Manufacturer: Mersen. SKU: A300219. Country of Origin: US. UNSPSC Code: 39121628.
  • Ultra-fast acting aR protection for semiconductors
  • Rated 550A, 690VAC (IEC) / 700VAC (UL)
  • Size 33 square body with open slot blades
  • Striker mechanism for trip indication
  • Low I²t and high interrupting rating

Specifications

_Family Code
136
_Family Description
Square Body SC Fuses
AC Voltage Rating
700 V
Amperage Rating
550 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
Open Slot Blades
Mounting
Bolted
Response Time
High-Speed
Size
4.96 x 2.87 x 3.09 in
Size
126 x 73 x 78.5 mm
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
700 V
Wattage
110 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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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.