Mersen TR45R-3PK Fuse TR-R - Class RK5 - Time-Delay 250VAC 250VDC 45A Ferrule Tri-Onic® 3 pack
Alternate Item Number: TR45R-3PK
UPC: 782001333645
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Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Class RK5, Time-Delay Fuse for reliable overcurrent protection
- Safely handles motor starting and transformer inrush currents
- Current-limiting with low peak let-through current
- Durable fiberglass body and high-grade silica filler for harsh environments
- Rejection-style design prevents replacement errors (with recommended blocks)
Specifications
AC Voltage Rating | 250 V |
Amperage Rating | 45 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 | 45A |
Interrupt Rating | 200 kA |
Mounting | Clip |
Series | TR-R |
Size | 3 x 0.81 in |
Size | 76.2 x 20.65 mm |
Size | 3 x 0.81;76.2 x 20.65 in;mm |
Size | Ferrule |
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 | 250 VAC |
Package Dimensions (L x W x H) | 3 in x 0.81 in x 0.81 in |
Package Dimensions (L x W x H) | 76.2 mm x 20.65 mm x 20.65 mm |
Package Weight (Imperial) | 0.135 lb |
Package Weight (Metric) | 0.061 kg |
GPM-SRR90
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
C331156
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
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 are the AC and DC interrupting ratings for TR-R fuses?
TR-R fuses have an AC interrupting rating of 200kA and a DC interrupting rating of 20kA.
What are the AC and DC interrupting ratings for TRS-R fuses?
TRS-R fuses have an AC interrupting rating of 200kA. For DC, they are 20kA for 1/10-60A and 100kA for 70-600A.
What applications are Tri-Onic TR and TRS fuses designed for?
These fuses are engineered for overcurrent protection of motor circuits, mains, feeders, branch circuits, transformers, and general-purpose equipment.
What is the primary benefit of the time-delay characteristic?
The time-delay characteristic safely handles harmless starting currents and inrush currents from motors and transformers without nuisance opening.
Does Mersen offer a blown fuse indicator for these fuses?
Yes, an optional solid-state SmartSpot blown fuse indicator is available. To order, add 'ID' to the catalog number.
What are the UL and CSA approval standards for these fuses?
They are UL listed to standard 248-12 (File E2137) and CSA certified to standard C22.2 no. 248.12.
Are TRS-R fuses DC listed to a specific UL standard?
Yes, TRS-R fuses are DC listed to UL standard 248.
What are the voltage ratings for TR-R fuses?
TR-R fuses are rated for 250VAC and 250VDC for .1-2.8A and 35-400A. They are also rated for 160VDC for 3-30A and 450-600A.
What is the amperage range for TR-R and TRS-R fuses?
Both TR-R and TRS-R fuses are available in amperage ratings from 1/10 to 600A.
Are there any features to prevent replacement errors?
Yes, the rejection-style design prevents replacement errors when used with the recommended fuse blocks.
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.