Mersen ACK40 - Forklift Truck ACK 125VAC 125VDC 40A Time Delay Blade
Mersen

ACK40

Alternate Item Number: ACK40

UPC: 782001791193


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Multiplier: 10

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Overview

The Mersen ACK40 (SKU: ACK40) is a 40A time-delay blade fuse specifically designed for heavy-duty DC battery-powered equipment. Ideal for applications like forklift trucks, battery hand trucks, and motorized work platforms, this fuse operates reliably at 125V AC or DC. It features a 10kA interrupting rating (AC/DC) and a time-delay characteristic crucial for managing the high inrush currents typical in battery systems, preventing nuisance tripping while ensuring effective circuit protection. The ACK40's rugged, stud-mounted, bolt-in design guarantees long service life even in harsh industrial environments. Manufactured in the US, it meets UL recognition (File E60314) for global compliance. Compatible with Mersen fuse blocks such as the P243C, this fuse is a cost-effective solution for protecting circuits up to 400A in demanding heavy-duty applications. Its catalog number is embossed for easy identification.
  • 40A Time-Delay Blade Fuse for Heavy-Duty DC Battery Equipment
  • 125V AC/DC Voltage Rating
  • 10kA Interrupting Rating (AC/DC)
  • Time-Delay Design for High Inrush Currents
  • Stud-Mounted, Bolt-in Design for Harsh Environments
  • UL Recognized (File E60314)
  • Manufactured in the US

Specifications

AC Voltage Rating
125 V
Amperage Rating
40 A
Application
Forklift trucks Battery hand trucks Motorized work platforms Battery systems
Body Material
PolyTube
Brand Name
Mersen
Connection
Blade
Connection Material
Copper
Current Rating
40A
DC Voltage Rating
125 V
Interrupt Rating
10 kA
Mounting
Bolted
Size
3.74 x 0.86 in
Size
94.996 x 21.844 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)
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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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.

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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.
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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.