Mersen F300270 - Square Body High-Speed Fuse Protistor® Size 2x33 aR 690VAC IEC 700VAC UL 1600A With Striker Flush ends metric threads With Omega connection
Mersen

F300270

Alternate Item Number: PC233UD69V16CTF


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Specification Sheet

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Overview

The Mersen F300270 Protistor® fuse-link (SKU: F300270) is a square body, ultra-fast acting aR fuse designed for high-speed semiconductor protection in power conversion equipment. Rated at 33A with 690VAC/700VAC (IEC/UL) and 1600A interrupting capacity, it ensures precise fault clearing for diodes, thyristors, and IGBT devices. The fuse features silver-plated contact surfaces for low resistance and non-magnetic hardware to prevent interference in sensitive circuits. Metric threads with flush ends enable secure mounting in global equipment designs. An optional striker mechanism allows remote trip indication via microswitch for enhanced system monitoring. Die-cut fuse elements embedded in solidified sand optimize arcing control, reducing I²t values for improved protection. Compatible with worldwide mounting styles, this fuse-link supports flexible equipment design in industrial, renewable energy, and motor drive applications. The Protistor® series is engineered for high-speed semiconductor protection, offering superior performance in high-fault current scenarios. With a pre-arcing I²t of 200 kA²s and clearing I²t of 1600 kA²s, it provides rapid response to overcurrent conditions, minimizing damage to sensitive semiconductor components. The 690VAC/700VAC rating ensures compatibility with global power systems, while the omega connection and metric threads facilitate easy integration into existing designs. Ideal for applications requiring precise fault clearing and minimal downtime.
  • Ultra-fast acting aR fuse for semiconductor protection (diodes, thyristors, IGBTs)
  • Rated 33A, 690VAC/700VAC (IEC/UL), 1600A interrupting capacity
  • Silver-plated contacts for low resistance, non-magnetic hardware prevents interference
  • Omega connection with metric threads for global compatibility
  • Optional striker mechanism for remote trip indication via microswitch

Specifications

AC Voltage Rating
700 V
Amperage Rating
1600 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
End Contact with Threaded Holes
Connection Type
Omega
Connection Type
Omega connection, Metric threads
Current Rating
33 A
Current Rating
1600A
Material
Silver-plated, Non-magnetic hardware, Solidified sand
Material
Silver, Sand
Material
Silver
Mounting
Bolted
Mounting Type
Metric threads, flush ends
Mounting Type
Flush ends, metric threads
Mounting Type
Square body, Flush ends
Series
Protistor®
Size
2.66 x 6.48 x 3.09 in
Size
67.6 x 164.5 x 78.5 mm
Size
Size 2x33
Size
2x33
Size
2x33 aR
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
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
690VAC / 700VAC
Voltage Rating
690 VAC (IEC) / 700 VAC (UL)
Voltage Rating
700 V
Wattage
250 W
Package Dimensions (L x W x H)
2.66 in x 6.48 in x 3.09 in
Package Dimensions (L x W x H)
67.6 mm x 164.5 mm x 78.5 mm
Package Weight (Imperial)
4.370 lb
Package Weight (Metric)
1.982 kg
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9F61 Size B Clips 1.6in

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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.

Frequently Asked Questions

What is the interrupting capacity of the F300270?

The F300270 has a rated interrupting capacity of 1600A at 690VAC/700VAC.

What is the pre-arcing I²t value for the F300270?

The pre-arcing I²t value for the F300270 is 200 kA²s.

What type of connection does the F300270 use?

The F300270 uses an omega connection with metric threads for secure mounting.

What is the voltage rating of the F300270?

The F300270 is rated for 690VAC (IEC) and 700VAC (UL).

Does the F300270 support remote trip indication?

Yes, the F300270 includes an optional striker mechanism for remote trip indication via microswitch.

What materials are used in the F300270?

The F300270 features die-cut elements in solidified sand, silver-plated contact surfaces, and non-magnetic hardware.

What applications is the F300270 suitable for?

The F300270 is designed for industrial, renewable energy, and motor drive applications requiring high-speed semiconductor protection.

What is the power dissipation at rated current for the F300270?

The power dissipation at rated current (33A) for the F300270 is 160W.

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.