Mersen A4BY800-TI Fuse A4BY - Class L - Time-Delay 600VAC 300VDC 800A Blade TI Indicator Amp-Trap®
Alternate Item Number: A4BY800-TI
UPC: 782001939564
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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 L, time-delay fuse rated 800A for 600VAC/300VDC applications
- 100% rated device for continuous operation at full ampere rating
- 4-second minimum delay at 500% of rating to handle temporary inrush currents
- Blade terminal configuration with TI (trigger indicator) for status monitoring
- Designed for service entrance, feeder circuits, and circuit breaker protection
Specifications
AC Voltage Rating | 600 V |
Amperage Rating | 800 A |
Application | Mains Feeders Circuit Breakers Load centers Panelboards Switchboards Metering Centers |
Body Material | GMG |
Brand Name | Mersen |
Class | Class L |
Connection | Blade |
Connection Material | Silver-Plated Copper |
DC Voltage Rating | 300 V |
Fuse Class | L |
Interrupt Rating | 200 kA |
Mounting | Bolted |
Size | 8.63 x 2 in |
Size | 219.202 x 50.8 mm |
Special Features | Unique dimensions prevent replacement by other fuse classes Blade-stamped catalog numbers for permanent identification Glass melamine body and plated terminals provide superior reliability in harsh environments |
Standard | Mersen Self-Certification, UL Listed to Standard 248-10, File E2137 CSA Certified to Standard C22.2, No. 248.10 IEC 269-2-1 DC Tested to UL 248 limits (Mersen Self-Certified) |
Sub Brand | Amp-Trap® |
Type | Class L |
Type Of Indicators | TI Indicator |
Voltage Rating | 600 VAC |
Package Dimensions (L x W x H) | 8.63 in x 2 in x 2 in |
Package Dimensions (L x W x H) | 219.202 mm x 50.8 mm x 50.8 mm |
Package Weight (Imperial) | 3.950 lb |
Package Weight (Metric) | 1.792 kg |
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Frequently Asked Questions
What are the voltage ratings for the A4BY Class L fuses?
The A4BY fuses are rated for 600VAC and 300VDC.
What is the ampere rating range for A4BY fuses?
A4BY fuses are available from 200 to 6000A for AC applications and 200 to 2500A for DC applications.
What is the interrupting rating (I.R.) for A4BY fuses?
The interrupting rating is 200kA I.R. AC and 100kA I.R. DC.
What is the time delay characteristic of the A4BY fuse?
The A4BY fuse has a 4-second minimum time delay at 500% of its rating.
What are the key features of the A4BY Class L fuses?
Features include unique dimensions for one-way interchangeability, blade stamped catalog numbers, and a glass melamine body with plated terminals.
What applications are A4BY fuses suitable for?
They are suitable for mains, feeders, circuit breakers, load centers, panelboards, switchboards, and metering centers.
What standards are the A4BY fuses approved or certified to?
They are UL listed to standard 248-10 and CSA certified to standard C22.2 No. 248.10. They are also self-certified for DC.
How can I identify an A4BY fuse with a blown fuse indicator?
Add '-TI' to the end of the standard part number to indicate an optional blown fuse trigger indicator.
Can I substitute a different class fuse for a Class L fuse?
Class L fuses are dimensioned for one-way interchangeability, meaning a Class L fuse of a lower ampere rating can replace a given Class L fuse.
What is the purpose of the unique dimensions of Class L fuses?
The unique dimensions prevent replacement by other fuse classes, ensuring proper application and safety.
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.