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Mersen ALS350 - Forklift Truck ALS 125VAC 125VDC 350A Fast-Acting Blade
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Mersen ALS350 Forklift Truck ALS 125VAC 125VDC 350A Fast-Acting Blade

Alternate Item Number: ALS350

UPC: 782001791674


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Technical DrawingLine DrawingSpecification Sheet

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen ALS350 is a fast-acting blade fuse specifically engineered for DC battery-powered industrial equipment, including forklift trucks, battery hand trucks, and motorized work platforms. Designed to operate in both 125VAC and 125VDC circuits, this 350A fuse delivers reliable overcurrent and short-circuit protection with a high interrupting rating of 10kA for both AC and DC applications. Its durable construction features long slotted blades (Size 31, Type LI) and a stud-mounted, bolt-in design, ensuring secure installation even in harsh industrial environments. The ALS350 is optimized for rapid fault response, with a pre-arcing I²t of 10,300 A²s and a breaking capacity of 61,000 A²s at rated voltage, minimizing damage during fault conditions. It is fully compatible with Mersen fuse blocks such as the P243C (ACK series) and P243E (ACL series), allowing for seamless integration into existing systems. Weighing just 0.42 kg and operating with a power dissipation of 67W, it provides a compact yet high-performance protection solution for demanding applications.
  • Rated for 125VAC/DC circuits with 350A current capacity
  • 10kA interrupting rating (AC/DC) for robust short-circuit protection
  • Long slotted blades (Size 31, Type LI) for secure stud mounting
  • Pre-arcing I²t: 10,300 A²s; Breaking capacity: 61,000 A²s
  • Compatible with Mersen P243C (ACK series) and P243E (ACL series) fuse blocks

Specifications

AC Voltage Rating
125 V
Amperage Rating
350 A
Application
Forklift trucks Battery hand trucks Motorized work platforms Battery systems
Body Material
PolyTube
Brand Name
Mersen
Connection
Blade
Connection Material
Copper
DC Voltage Rating
125 V
Interrupt Rating
10 kA
Mounting
Bolted
Size
4.71 x 1.12 in
Size
119.634 x 28.448 mm
Special Features
All fuses are AC and DC rated Expanded ampere ratings Time-delay and general purpose types
Standard
UL recognized components (All Products) File E60314
Type
Forklift Truck Fuses
Voltage Rating
125 VAC
Package Dimensions (L x W x H)
4.71 in x 1.12 in x 1.12 in
Package Dimensions (L x W x H)
119.634 mm x 28.448 mm x 28.448 mm
Package Weight (Imperial)
0.260 lb
Package Weight (Metric)
0.118 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.

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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

Frequently Asked Questions

What applications is the ALS350 designed for?

The ALS350 is designed for DC battery-powered industrial equipment like forklift trucks, battery hand trucks, and motorized work platforms.

What is the interrupting rating of the ALS350?

The ALS350 has a 10kA interrupting rating for both AC and DC circuits.

Is the ALS350 compatible with Mersen fuse blocks?

Yes, the ALS350 is compatible with Mersen P243C (ACK series) and P243E (ACL series) 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.