Eaton ACK-400 Fuse - Time-delay Stud-Mounted
Part Number: ACK-400
Quick Summary
ACK-400 fuse protects DC circuits in lift trucks and battery chargers. For engineers, selecting the wrong fuse can lead to unexpected downtime and costly equipment damage. Certifications such as SIL, CE, or IP ratings are not listed for ACK-400 in this dataset, so consult Eaton datasheets for any regulatory markings. This Bussmann series fuse delivers time-delay protection with easy stud mounting, supporting quick installation and maintenance in harsh industrial environments. By delivering reliable DC protection, it helps keep forklift fleets running and battery charging systems available, reducing service calls and improving overall machine uptime.
Product Information
Extended Description
ACK-400 Eaton: Eaton Bussmann series ACK fuse, Time-delay stud-mounted fuse, DC circuits protection for fork lift truck and battery chargers, 400 A, Non-indicating, 100 sec at 200%, 35 sec 300%, 13 sec at 500%, Stud, Standard, 80 Vdc
Product Name
Eaton Bussmann series ACK fuse
Catalog Number
ACK-400
UPC
051712701488
EAN
5027590092708
Product Length/Depth
3.87 in
Product Height
1.063 in
Product Width
1.063 in
Product Weight
0.3 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
400 A
Response time
100 sec at 200%, 35 sec 300%, 13 sec at 500%
Voltage rating
80 Vdc
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 Fuseology
Eaton Specification Sheet - ACK-400
ACK-400~LIFT TRUCK FUSE
ACK-400~LIFT TRUCK FUSE
Feature → Business Impact → Application: The ACK-400 provides a 400 A amperage rating with a time-delay curve (100 seconds at 200%, 35 seconds at 300%, 13 seconds at 500%), which translates to superior protection for motors with inrush and charging circuits while minimizing nuisance trips during startup. This leads to measurable uptime gains in material handling and charging stations, while maintaining safe DC circuit protection for forklift power feeds. Application-wise, it is ideal for lift truck DC circuits and battery chargers where short-duration overloads are common, supporting longer motor life and reduced maintenance costs. Feature → Business Impact → Application: With an 80 Vdc rating and stud-mount mounting method, installation is straightforward in constrained battery compartments and control panels. The standard packaging and non-indicating design simplify stock handling and reduce replacement downtime, especially in high-change environments. This enables rapid technician swaps during preventive maintenance windows and ensures consistent electrical protection in harsh industrial settings. Feature → Business Impact → Application: The compact footprint (3.87 in long, 1.063 in high and wide) pairs with a durable stud-mounted form factor, delivering space-efficient DC protection for compact battery charging modules and power distribution blocks. This reduces enclosure crowding and supports ergonomic service work, improving overall maintenance efficiency. Feature → Business Impact → Application: Compatibility with the Bussmann series family provides interchangeability with existing fuses and simplifies spares for fleets using multiple Eaton Bussmann devices. This lowers total cost of ownership by streamlining procurement, improving stocking accuracy, and reducing downtime due to mis-matched fuses. Feature → Business Impact → Application: The ACK-400’s non-indicating feature minimizes visual inspections and reduces unnecessary maintenance checks, while the time-delay characteristics tolerate short-lived surges common in DC charging while still delivering protective performance. This helps technicians justify fuse selections in cost-of-ownership analyses and supports reliable long-term electrical protection for forklifts and chargers.
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FAQs
Install the ACK-400 using its stud mounting method in the DC power path of the forklift or charger. Ensure the mounting stud and terminal connections are clean, torque to the manufacturer’s recommendation, and verify voltage rating at 80 Vdc to match the circuit. Use appropriate fusing practices and enclosure protection to maintain reliability in harsh environments.
The ACK-400 exhibits a time-delay profile with 100 seconds at 200%, 35 seconds at 300%, and 13 seconds at 500% overload. This behavior provides tolerance for motor startup surges and charging inrush while protecting the DC circuit from sustained overcurrent events.
Yes. The fuse is designed for DC circuits in forklift applications and battery charging systems, with an 80 Vdc rating and 400 A protection, offering reliable in-rush handling and continuous overcurrent protection to minimize charger faults and downtime.
The dataset lists 'Compliances' as Not Applicable for the ACK-400. For definitive certifications (such as SIL, CE, IP), consult Eaton’s official datasheets or contact Eaton support to confirm current regulatory markings and industry approvals.
The ACK-400’s time-delay rating, 80 Vdc operation, and robust stud-mount design reduce nuisance trips and simplify replacement in busy fleets. This translates to lower maintenance costs, higher equipment uptime, and a lower total cost of ownership for material handling and charging infrastructure.