Eaton BK/ACK-140 Fuse - Time-Delay, Copper-Terminal, 72 Vdc
Part Number: BK/ACK-140
Quick Summary
BK/ACK-140 fuse is a time-delay fuse designed for lift trucks and battery chargers. Many installations suffer from nuisance trips or undersized protection in crowded battery compartments. Note that the datasheet lists no specific certifications; for projects requiring SIL, CE, or IP ratings, consult Eaton for certification documents. With a 140 A rating and a 72 Vdc operating voltage, this dual, non-indicating fuse uses copper terminals and ships in bulk for scalable maintenance programs. Built for reliability in industrial DC circuits, it supports efficient fleet protection while enabling optimized spare-part strategies and lower total cost of ownership.
Product Information
Extended Description
BK/ACK-140 Eaton: Eaton Bussmann series ACK fuse, Time-delay stud-mounted fuse, Lift truck and battery charger fuse, 140 A, Dual, Non-indicating, 100 sec at 200%, 35 sec at 300%, 13 sec at 500%, Copper terminal, Bulk, 100, 72 Vdc
Product Name
Eaton Bussmann series ACK fuse
Catalog Number
BK/ACK-140
UPC
051712616614
Product Length/Depth
3.63 in
Product Height
1.063 in
Product Width
1.063 in
Product Weight
40.3 lb
Warranty
Not Applicable
Compliances
Not Applicable
Certifications
Not Applicable
Catalog Notes
Bulk
Amperage Rating
140 A
Response time
100 sec at 200%, 35 sec at 300%, 13 sec at 500%
Voltage rating
72 Vdc
Material
Copper terminal
Number of elements
Dual
Packaging type
Standard Bulk
Fuse indicator
Non-indicating
Mounting method
Stud
Quantity
100
Special features
Silver-plated fuse caps
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - BK/ACK-140
Feature → Business Impact → Application: Time-delay design reduces nuisance tripping in high-inrush DC loads, improving uptime and equipment life in lift-truck charging and aggressive charging profiles; Application: lift trucks, battery chargers. Feature → Business Impact → Application: Stud-mounted construction and copper terminals provide robust, low-resistance connections, simplifying installation in crowded control panels and reducing contact resistance over time; Application: heavy equipment fleets. Feature → Business Impact → Application: Dual elements enable better current sharing and selective protection in high-current circuits, minimizing collateral outages; Application: high-current DC distribution. Feature → Business Impact → Application: Bulk packaging and 100-unit quantities streamline procurement and spare planning, lowering logistics costs; Application: maintenance teams and large fleets. Feature → Business Impact → Application: Silver-plated fuse caps improve contact reliability and corrosion resistance in harsh environments, enhancing longevity in industrial settings; Application: rugged industrial applications with exposure to contaminants. The BK/ACK-140 combines these attributes to deliver measurable efficiency gains, compliant protection, and reduced downtime across automotive, material handling, and stationary charging infrastructure.
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FAQs
To install BK/ACK-140, disconnect power, locate the fuse studs, and secure the fuse with proper torque on the copper-terminal studs. Confirm alignment with the stud mounting method and ensure the bulk-pack units are kept in a clean, dry environment to prevent corrosion. Use appropriate safety procedures per site standards.
The BK/ACK-140 is rated for 140 A at 72 Vdc. It is a time-delay, dual-element fuse with non-indicating status. Expect defined response times at 200%, 300%, and 500% overload, helping to protect heavy DC loads such as lift-truck chargers while tolerating short inrush currents without nuisance trips.
Yes. With a 72 Vdc rating, copper terminals, and stud mounting, BK/ACK-140 is designed for high-current DC protection in lift-truck charging and similar industrial battery charging applications, offering reliable protection and straightforward integration into existing DC distribution schemes.
The datasheet lists certifications as Not Applicable. If your project requires SIL, CE, IP, or other certifications, contact Eaton for the appropriate documentation and confirmation of suitability for your facility’s regulatory requirements before deployment.
BK/ACK-140 contributes to ROI through reduced nuisance trips, lower maintenance downtime, and bulk-pack procurement. The robust copper terminal and time-delay design minimize unscheduled outages in high-current DC circuits, delivering improved asset availability and lower stocking costs over the equipment lifecycle.