Eaton ACK-120A Fuse - Time-delay DC Stud-Mounted 120 A
Part Number: ACK-120A
Quick Summary
The Eaton ACK-120A fuse provides time-delay DC protection for forklift trucks and battery chargers. It mitigates nuisance trips during startup surges, helping keep critical material-handling and charging stations online. The data sheet lists standard ratings and a stud-mounted dual-element design, with no explicit CE/UL certifications indicated. For procurement teams, its compact footprint and rugged mounting simplify installation in tight control enclosures while delivering reliable protection in demanding environments. By combining fast response control with sustained surge tolerance, this fuse supports higher equipment uptime and lower maintenance costs, delivering value in warehouse automation, fleet charging, and industrial automation applications.
Product Information
Extended Description
ACK-120A Eaton: Eaton Bussmann series ACK fuse, Time-delay stud-mounted fuse, DC circuits protection for fork lift truck and battery chargers, 120 A, Dual, Non-indicating, 100 sec at 200%, 35 sec 300%, 13 sec at 500%, Standard
Product Name
Eaton Bussmann series ACK fuse
Catalog Number
ACK-120A
UPC
051712578332
Product Length/Depth
3.63 in
Product Height
1.063 in
Product Width
1.063 in
Product Weight
0.178 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
120 A
Response time
100 sec at 200%, 35 sec 300%, 13 sec at 500%
Number of elements
Dual
Packaging type
Standard
Fuse indicator
Non-indicating
Mounting method
Stud
Special features
One time fuse
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - ACK-120A
Feature: Time-delay fuse operation is designed to tolerate short surges rather than trip immediately. Business Impact: Reduces nuisance trips and unplanned downtime in DC charging and drive circuits. Application: Ideal for forklift battery charger circuits and DC motor controllers in material handling equipment. Feature: Dual-element construction provides redundancy within a single package. Business Impact: Improves reliability during rapid current transients and overload events. Application: Protects DC distribution paths in heavy equipment and charging systems. Feature: Stud mounting enables rugged, secure installation in tight control panels. Business Impact: Faster, safer wiring and maintenance with robust mechanical support. Application: Used in industrial enclosures on forklifts and stationary charging stations. Feature: Non-indicating fuse simplifies panel design by removing visual status indicators. Business Impact: Reduces wiring complexity and spare parts needs while relying on PLC/monitoring diagnostics. Application: Fits environments where indication is provided elsewhere. Feature: 120 A rating with defined response times supports reliable cut-off without unnecessary trips. Business Impact: Provides predictable protection thresholds and downtime reduction in high-surge DC circuits. Application: Suitable for forklift propulsion circuits and high-current battery chargers. Feature: Standard Bussmann packaging and dimensions ensure easy stocking and interchangeability. Business Impact: Streamlines procurement, inventory management, and maintenance planning. Application: Compatible with Bussmann series inventories in industrial control panels.
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FAQs
The ACK-120A uses stud mounting with a dual-element arrangement. Its dimensions—3.63 in length and 1.063 in both width and height—fit standard Bussmann-style control panels and chassis, enabling straightforward integration into forklift drive circuits and battery charging enclosures. This compatibility simplifies replacement and stocking within existing DC protection inventories.
The ACK-120A provides defined response times for overloads: 100 seconds at 200% overload, 35 seconds at 300%, and 13 seconds at 500%. This time-delay characteristic balances surge tolerance with rapid protection, helping protect DC circuits in forklifts and battery chargers without nuisance trips during startup transients.
Yes. The ACK-120A is designed for DC circuit protection in forklift trucks and battery charging systems. Its time-delay behavior accommodates startup surges typical of heavy loads, while its dual-element construction provides robust protection against sustained faults. Installers should mount it on a secure stud connection in the control cabinet to ensure reliable operation.
Non-indicating fuses require periodic electrical testing or monitoring through upstream diagnostics since there is no visual confirmation of status. Plan preventive maintenance around scheduled inspections, confirm continuity during fault events, and replace the fuse after any fault trip or end-of-life indication to maintain uninterrupted DC protection for forklifts and charging stations.
You can access the Eaton Bussmann ACK-120A specification sheet at Eaton’s site (ACK-120A.pdf), as well as catalog PDFs and a video overview in the Bussmann series resources. Additional references include the Bussmann series full-line catalog no. 1007 and related Fuseology multimedia for installation and specification guidance.