Eaton BK/CB221-7-1/2 Automotive Circuit Breaker - 150 AIC
Part Number: BK/CB221-7-1/2
Quick Summary
The Eaton CB221 automotive circuit breaker protects GM vehicle electrical systems by interrupting overcurrent events, seamlessly protecting wiring and components. In the field, technicians face nuisance trips and downtime when harness faults cascade into sensitive circuits. Certifications for automotive protection parts typically include CE and UL recognition, along with ISO 9001 quality management practices; verify exact certificates with Eaton for this model. With a 14 Vdc rating, 25 A amperage, and a 150 AIC interrupt rating in a GM-compatible ATC footprint, the BK/CB221-7-1/2 delivers reliable protection. Stocking this Eaton Bussmann device simplifies procurement, reduces spare-part variety, and supports faster maintenance planning and uptime in critical vehicle networks.
Product Information
Extended Description
BK/CB221-7-1/2 Eaton: Eaton Bussmann series CB221 automotive circuit breaker, Packaging quantity 100, 14 Vdc, 25 A, 150 AIC, Type I ATC footprint, GM vehicles
Product Name
Eaton Bussmann series CB221 automotive circuit breaker
Catalog Number
BK/CB221-7-1/2
UPC
051712846790
Product Length/Depth
0.55 in
Product Height
1.27 in
Product Width
1.7 in
Product Weight
0.5 lb
Compliances
Contact factory
Certifications
Contact Manufacturer
Amperage Rating
25 A
Interrupt rating
150 AIC
Voltage rating
14 Vdc
Quantity
6
Special features
Packaging quantity 100
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Eaton Specification Sheet - BK/CB221-7-1/2
The BK/CB221-7-1/2 operates at 14 Vdc with a 25 A amperage rating, aligning with common 12–14 V automotive power rails. This combination minimizes nuisance trips while safeguarding wiring insulation and sensitive loads, translating into fewer road-side failures. The 150 AIC interrupt rating enables rapid fault clearance under short-circuit conditions, reducing conductor heating and downstream component damage for improved system reliability. Type I ATC footprint provides drop-in compatibility with GM fuse blocks and similar blade-style holders, making installation quick and precise while minimizing service time. Packaging quantity of 100 units supports bulk stocking for service centers and fleets, simplifying procurement and inventory management. Built for automotive environments and GM vehicle networks, this breaker offers rugged protection with consistent performance across duty cycles, helping maintain uptime and reduce maintenance costs.
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FAQs
BK/CB221-7-1/2 uses a Type I ATC footprint designed for GM fuse blocks, enabling a direct drop-in replacement in compatible 12–14 V automotive harnesses. It supports standard GM service procedures, reduces rework, and fits common blade-style holders, which shortens installation time and minimizes the risk of misfit parts during servicing.
The device operates at 14 Vdc, with a 25 A amperage rating and a 150 AIC interrupt rating. These specifications protect circuits from overcurrent by interrupting fault current quickly, limiting conductor heating and preventing damage to connected loads, wiring insulation, and adjacent components in automotive electrical systems.
While it is specifically validated for GM vehicles with GM-style ATC footprints, the 14 Vdc, 25 A, and 150 AIC ratings suit a broad range of 12–14 V automotive circuits. Always verify fit before deployment, and consider compatibility with your vehicle’s fuse block design and wiring harness if not GM-branded.
Manufacturer-listed certifications are provided upon inquiry; compliance details are typically confirmed with Eaton. For global deployment, customers should verify CE, UL recognition, and ISO 9001 practices with Eaton to ensure regulatory alignment and traceability for your region and application.
By reducing nuisance trips, enabling rapid fault clearance, and simplifying stocking with bulk packaging (100 units), this breaker lowers maintenance downtime and inventory costs. Its GM-optimized footprint minimizes service time, contributing to faster repairs and improved fleet uptime across routine automotive maintenance workflows.