Mersen A50QS900-4 High Speed Fuse Amp-Trap® A50QS 500VAC 500VDC 900A Blade
Alternate Item Number: A50QS900-4
UPC: 782001142322
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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
- 500VAC/DC voltage rating with 200kA AC and 87kA DC interrupting ratings
- 900A current rating for high-power semiconductor protection
- Blade-style connection for compatibility with A50QS fuse blocks
- Low I²t and watts loss for enhanced equipment longevity
- UL recognized (File 60314) and CSA certified (LR12636)
Specifications
AC Voltage Rating | 500 V |
Amperage Rating | 900 A |
Application | Protection of 500V or less motor drives, UPS, inverters, etc. |
Brand Name | Mersen |
Case | GMG |
Case Material | GMG |
Connection | Blade |
Current Rating | 900A |
DC Voltage Rating | 500 V |
Mounting | Bolted |
Mounting | Bolt |
Size | 6.97 x 2.88;177.038 x 73.152 in;mm |
Size | 6.97 x 2.88 in |
Size | 177.038 x 73.152 mm |
Special Features | Lowest I2t for greatest protection of semiconductor circuits Low watts loss for cooler operation Superior cycling ability gives an equipment design advantage State-of-the-art protection for 500V equipment Ultra compact sizes allow down-sizing of existing equipment |
Standard | UL recognized component UL File 60314 AC: UL guide no. JFHR2 DC Tested to UL standard 198L parameters (70-1200A) CSA Certified LR12636 |
Sub Brand | Amp-Trap® |
Type | Round Body High-Speed Fuse-Links AC Protection |
Voltage Rating | 500 V V |
Voltage Rating | 500 V |
Package Dimensions (L x W x H) | 6.97 in x 2.88 in x 2.88 in |
Package Dimensions (L x W x H) | 177.038 mm x 73.152 mm x 73.152 mm |
Package Weight (Imperial) | 4.800 lb |
Package Weight (Metric) | 2.177 kg |
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Frequently Asked Questions
What voltage ratings does the A50QS900-4 support?
The fuse operates at 500VAC and 500VDC, making it suitable for both AC and DC applications up to 500 volts.
What is the interrupting rating of the A50QS900-4?
The fuse has a 200kA interrupting rating at 500VAC and 87kA at 500VDC, ensuring robust short-circuit protection.
What certifications does the A50QS900-4 have?
The fuse is UL recognized under File 60314 (Guide JFHR2) and CSA certified (LR12636).
What ampere ratings are available in the A50QS series?
The A50QS series covers ampere ratings from 35A to 1200A for both AC and DC applications.
What applications is the A50QS900-4 designed for?
It protects dynamic solid-state equipment such as motor drives, UPS systems, inverters, and other 500V or less power electronics.
What is the connection type for the A50QS900-4?
The fuse uses a blade-style connection, compatible with A50QS fuse blocks.
Is the A50QS900-4 suitable for cyclic loading?
Yes, the fuse is designed for superior cycling ability, offering longer operational life under cyclic loading conditions.
What is the I²t value of the A50QS900-4?
The A50QS series features the lowest I²t in its class, providing superior protection for sensitive semiconductor components during short circuits.
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.