Mersen A2D300/600R Reducer Fuse A2D-R - Class RK1 - Time-Delay 250VAC 250VDC 300A Blade SmartSpot® Amp-Trap…
Alternate Item Number: A2D300/600R
UPC: 782001489427
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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
- Permanent current rating reduction (110A–400A) without temporary fuse reducers
- Time-delay operation for motor starting and transformer inrush protection
- 250VAC/250VDC dual voltage rating with 300kA interrupting rating
- SmartSpot® visual indicator for fuse status and maintenance
- Current-limiting design reduces arc flash energy and peak let-thru current
Specifications
AC Voltage Rating | 250 V |
Amperage Rating | 300 A |
Application | Motors Safety switches Transformers Branch circuit protection Disconnects Control panels All general-purpose circuit |
Body Material | PolyTube |
Brand Name | Mersen |
Class | Class RK1 |
Connection | Blade |
Connection Material | Tin-Plated Copper |
Current Rating | 300A |
Interrupt Rating | 200 kA |
Mounting | Clip |
Series | A2D-R |
Size | 10.38 x 3.12 in |
Size | 263.652 x 79.375 mm |
Size | 10.38 x 3.12;263.652 x 79.375 in;mm |
Special Features | Replaces traditional temporary-use only Fuse Reducer accessories Time-delay for motor starting and transformer inrush currents without nuisance opening 300kA interrupting rating - self-certified, UL witnessed tests Extremely current-limiting for low peak let-thru current Recommended for Arc Flash energy reduction Easy 2-to-1 selectivity for prevention of nuisance shut downs and “black outs” Rejection-style design prevents replacement errors (when used with recommended fuse blocks) High-visibility orange label gives instant brand recognition Reduced inventory by taking the place of lower-rated Class RK1 fuses and associated Fuse Reducer accessories Metal-embossed date and catalog number for easier traceability and lasting identification Fiberglass body provides dimensional stability in harsh industrial settings |
Standard | UL listed to standard 248-12 DC listed to UL standard 248 CSA certified to standard C22.2 No. 248.12 |
Standard | UL Special Purpose Listed to 248-12 DC listed to UL standard 248 CSA certified to standard C22.2 No. 248.12 |
Sub Brand | Amp-Trap 2000® |
Type | Class RK1 |
Type Of Indicators | SmartSpot® |
Voltage Rating | 250VAC 250VDC |
Package Dimensions (L x W x H) | 10.38 in x 3.12 in x 3.12 in |
Package Dimensions (L x W x H) | 263.652 mm x 79.375 mm x 79.375 mm |
Package Weight (Imperial) | 3.100 lb |
Package Weight (Metric) | 1.406 kg |
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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 voltage ratings for the A2D-R and A6D-R fuses?
The A2D-R fuses are rated for 250VAC/DC, while the A6D-R fuses are dual rated for 600VAC/DC.
What is the main advantage of A2D-R and A6D-R Reducer Fuses?
These fuses offer a safe, permanent solution to decrease current ratings without needing temporary Fuse Reducer accessories.
What UL standards are these fuses listed to?
They are UL listed to standard 248-12 and DC listed to UL standard 248.
What type of protection do these fuses provide?
They provide time-delay for motor starting and transformer inrush currents without nuisance opening, and are extremely current-limiting.
What CSA standard do these fuses comply with?
These fuses are CSA certified to standard C22.2 No. 248.12.
What is the interrupting rating (IR) for these fuses?
They have a 200kA I.R. AC and 100kA I.R. DC, with self-certified 300kA I.R. for A6D-R, UL witnessed.
Are these fuses suitable for reducing Arc Flash energy?
Yes, these fuses are recommended for Arc Flash energy reduction due to their current-limiting capabilities.
How do these fuses prevent nuisance shut downs?
They offer easy 2-to-1 selectivity, which helps prevent nuisance shut downs and 'black outs'.
What is the purpose of the rejection-style design?
The rejection-style design prevents replacement errors when the fuses are used with recommended fuse blocks.
What materials are used in the construction of these fuses?
The fuses feature a fiberglass body for dimensional stability in industrial settings and a high-visibility orange label.
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.