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Mersen ACK50 - Forklift Truck ACK 125VAC 125VDC 50A Time Delay Blade
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Mersen ACK50 Forklift Truck ACK 125VAC 125VDC 50A Time Delay Blade

Alternate Item Number: ACK50

UPC: 068938791209


Documents & Media
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 ACK50 is a 50A time-delay blade fuse engineered for heavy-duty DC battery-powered equipment, including forklift trucks and motorized work platforms. Rated for 125V AC/DC operation, this fuse delivers robust circuit protection with a minimum breaking capacity (MBC) of 180A and a maximum time to clear at MBC of 50 ms. Its time-delay design allows brief overloads without nuisance tripping, making it ideal for inductive loads like motors and solenoids. The ACK50 features a power dissipation of 0.8W at 0.5 In, ensuring efficient thermal performance in demanding environments. Part of Mersen’s expanded line of forklift truck fuses, the ACK50 provides essential protection for critical battery systems, ensuring reliable operation and reduced downtime.
  • 50A rated current for heavy-duty DC applications
  • Time-delay design prevents nuisance tripping during brief overloads
  • Minimum breaking capacity (MBC) of 180A with 50ms clearing time
  • 0.8W power dissipation at 0.5 In for efficient thermal performance
  • Power dissipation at 0.5 In: 0.8W
  • UL recognized components (File E60314)

Specifications

AC Voltage Rating
125 V
Amperage Rating
50 A
Application
Forklift trucks Battery hand trucks Motorized work platforms Battery systems
Body Material
PolyTube
Brand Name
Mersen
Connection
Blade
Connection Material
Copper
Connection Type
Time Delay Blade
Connection Type
Stud Mounted Bolt-In
Current Rating
50A
DC Voltage Rating
125 V
Interrupt Rating
10 kA
Material
Fuse
Material
Ceramic
Mounting
Bolted
Mounting Type
Stud mounted bolt-in
Mounting Type
Forklift Truck Mount
Series
ACK
Series
Forklift Truck Fuses
Size
3.74 x 0.86 in
Size
94.996 x 21.844 mm
Size
Blade
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)
3.74 in x 0.86 in x 0.86 in
Package Dimensions (L x W x H)
94.996 mm x 21.844 mm x 21.844 mm
Package Weight (Imperial)
0.100 lb
Package Weight (Metric)
0.045 kg
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Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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 is the rated current of the ACK50 fuse?

The ACK50 fuse has a rated current of 50A.

How fast does the ACK50 clear faults at MBC?

The ACK50 clears faults at MBC in a maximum of 50 milliseconds.

Is the ACK50 suitable for forklift truck applications?

Yes, the ACK50 is specifically designed for forklift trucks and motorized work platforms.

Does the ACK50 have a time-delay feature?

Yes, the ACK50 features a time-delay design to handle brief overloads without tripping.

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.