Eaton BK/ACK-120A Fuse - 72 Vdc Time-Delay Dual
Part Number: BK/ACK-120A
Quick Summary
The Eaton BK/ACK-120A fuse protects lift-truck charging circuits with time-delay, dual-element reliability. In practice, nuisance blows during battery recharges or transient surges can cause downtime, stranded equipment, and costly repairs. Note that the datasheet does not list SIL, CE, or IP certifications; consult Eaton if regulatory compliance is required for your facility. Bulk stocked in a 100-count pack, the BK/ACK-120A supports fast field replacements, reducing maintenance cycles and inventory carrying costs. With 72 Vdc operation and standard bulk packaging, it aligns with common lift-truck and battery charger protection schemes while enabling consistent procurement and supply chain planning.
Product Information
Extended Description
BK/ACK-120A Eaton: Eaton Bussmann series ACK fuse, Time-delay stud-mounted fuse, Lift truck and battery charger fuse, 120 A, Dual, Non-indicating, Bulk, 100, 72 Vdc
Product Name
Eaton Bussmann series ACK fuse
Catalog Number
BK/ACK-120A
UPC
051712616607
Product Length/Depth
3.63 in
Product Height
1.063 in
Product Width
1.063 in
Product Weight
0.18 lb
Warranty
Not Applicable
Compliances
Not Applicable
Catalog Notes
Bulk
Amperage Rating
120 A
Voltage rating
72 Vdc
Number of elements
Dual
Packaging type
Standard Bulk
Fuse indicator
Non-indicating
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-120A
Feature: Time-delay, dual-element design delivers controlled response to brief surge events, reducing nuisance trips. Business Impact: Improves uptime and reduces unplanned maintenance in high-cycle battery charging environments. Application: Lift-truck charging circuits and heavy equipment chargers, where transient currents are common. Feature: Stud-mounted construction simplifies installation and mounting in constrained electrical enclosures. Business Impact: Speeds up field servicing and minimizes labor costs during replacements. Application: Fleet maintenance bays and on-machine fuse integration. Feature: Silver-plated fuse caps enhance conductivity and resistance to corrosion in harsh industrial settings. Business Impact: Longer service life and lower contact resistance under vibration. Application: Dockside, warehouse floors, and automotive-style battery rooms. Feature: Bulk packaging (Standard Bulk, 100 pieces) reduces stockouts and procurement overhead. Business Impact: Lean inventory, faster replenishment, and improved spare-part planning. Application: Central stores and preventative maintenance programs. Feature: Non-indicating fuse status keeps control panels clean and visually uncluttered. Business Impact: Simpler diagnostics and streamlined cabinet design. Application: Automotive and material-handling control systems. The BK/ACK-120A’s compact dimensions (3.63 in L × 1.063 in W × 1.063 in H) and 0.18 lb weight support easy field upgrades and compatibility with existing fuse-holders.
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FAQs
Power down the equipment and verify de-energization before installation. Use a compatible stud-mounted holder and ensure the fuse aligns with the circuit orientation. The BK/ACK-120A measures 3.63 in in length, with a sturdy 0.18 lb weight, and employs silver-plated caps for reliable contact. Torque, clearance, and enclosure fill should follow your vehicle or charger manufacturer guidelines for high-current fuses.
The BK/ACK-120A employs a time-delay (slow-blow) element designed to tolerate short-duration surges without tripping, while still opening on sustained faults. This reduces nuisance trips during battery recharge spikes and inrush currents, improving uptime for lift-truck fleets and battery chargers while maintaining circuit protection at 120 A and 72 Vdc.
Yes. The fuse is specified for 72 Vdc systems and is offered in bulk packaging (100 pieces), making it suitable for fleet stores and preventive maintenance programs. Its dual-element design supports robust protection in high-current charging circuits, while the bulk SKU helps ensure consistent stocking and quick replacements.
The provided datasheet information does not list SIL, CE, or IP certifications. If regulatory compliance is required for your facility, contact Eaton support or your authorized distributor to confirm applicable certifications or to obtain a version that meets specific standards.
By minimizing nuisance trips and reducing unplanned downtime in lift-truck charging, fleets can improve availability and productivity. Bulk stocking lowers procurement costs, while the durable, silver-plated caps enhance long-term reliability in demanding environments. Overall, expect lower maintenance frequency, steadier charge cycles, and better fleet-wide uptime.