Mersen TRS1/2R - Fuse TRS-R - Class RK5 - Time-Delay 600VAC 600VDC 0.5A Ferrule Tri-Onic®
Mersen

TRS1/2R

Alternate Item Number: TRS1/2R

UPC: 782001748555


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Overview

The Mersen TRS1/2R is a Class RK5, time-delay, current-limiting fuse designed for robust overcurrent protection. Engineered by Mersen, this 0.5A fuse operates at 600VAC and 600VDC, offering versatility for both AC and DC applications. Its time-delay characteristic is crucial for safely managing the harmless starting currents and inrush currents associated with motors and transformers, preventing nuisance openings. The current-limiting feature ensures low peak let-thru current, enhancing system safety. Constructed with a durable fiberglass body, the TRS1/2R provides dimensional stability in demanding industrial settings. High-grade silica filler is utilized for fast arc quenching and effective current limitation. This fuse is UL listed to standard 248-12 and CSA certified to standard C22.2 no. 248.12. Its rejection-style design, when used with recommended fuse blocks, prevents incorrect replacements. The TRS1/2R is ideal for protecting motor circuits, mains, feeders, branch circuits, transformers, and service entrance equipment. Mersen's Tri-Onic® fuses, including the TRS-R series, are recognized for their reliability and performance in critical electrical protection applications. The TRS1/2R is a key component for ensuring the longevity and operational integrity of electrical systems.
  • Class RK5, Time-Delay, Current-Limiting Fuse
  • Rated 600VAC / 600VDC, 0.5 Amps
  • Safely handles motor start-up and transformer inrush currents
  • Durable fiberglass body for industrial environments
  • UL Listed to standard 248-12 and CSA Certified

Specifications

AC Voltage Rating
600 V
Amperage Rating
0.5 A
Application
Motor circuits Mains Feeders Branch circuits Transformers Service entrance equipment General-purpose equipment
Body Material
PolyTube
Brand Name
Mersen
Class
Class RK5
Connection
Ferrule
Connection Material
Copper
Connection Type
Ferrule
Current Rating
0.5A
Interrupt Rating
200 kA
Mounting
Clip
Series
Tri-Onic TRS-R
Size
5 x 0.81 in
Size
127 x 20.65 mm
Size
Ferrule
Size
5 x 0.81;127 x 20.65 in;mm
Special Features
Time-delay Current-limiting AC & DC rated Optional solid state SmartSpot blown fuse indicator Time-delay for motor start-ups and transformer inrush currents without nuisance opening Current-limiting for low peak let-thru current Rejection-style design prevents replacement errors (when used with recommended fuse blocks) Easy-to-read label for quick brand recognition and replacement Metal-embossed date and catalog number for traceability and lasting identification Fiberglass body provides dimensional stability in harsh industrial settings High-grade silica filler ensures fast arc quenching and high current limitation
Standard
UL listed to standard 248-12 File E2137 CSA certified to standard C22.2 no. 248.12 DC listed to UL standard 248 TRS only
Sub Brand
Tri-Onic®
Type
Class RK5
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
5 in x 0.81 in x 0.81 in
Package Dimensions (L x W x H)
127 mm x 20.65 mm x 20.65 mm
Package Weight (Imperial)
0.137 lb
Package Weight (Metric)
0.062 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.

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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.