Eaton BK/CB221-25 Automotive Circuit Breaker - 150 AIC
Part Number: BK/CB221-25
Quick Summary
The Eaton CB221 automotive circuit breaker protects vehicle electrical circuits against overcurrent events in automotive applications. Engineers and technicians often wrestle with fitting reliable protection into tight harness spaces while keeping installation simple and costs predictable. Note that exact certifications should be confirmed with Eaton; the unit uses a Type I ATC footprint for standard fitment and adheres to common automotive protection practices, with certifications available on request. For procurement and field service, the CB221-25 combines compact form with scalable packaging to streamline stocking across fleets, service centers, and OEM modules.
Product Information
Extended Description
BK/CB221-25 Eaton: Eaton Bussmann series CB221 automotive circuit breaker, Packaging quantity 100, 14 Vdc, 25 A, 150 AIC, Type I ATC footprint
Product Name
Eaton Bussmann series CB221 automotive circuit breaker
Catalog Number
BK/CB221-25
UPC
051712846837
Product Length/Depth
14.75 in
Product Height
7.5 in
Product Width
9.25 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/CB221-25
Feature: 14 Vdc voltage rating. Business Impact: Enables safe operation within standard automotive electrical systems and reduces risk of component damage in low-voltage environments. Application: Protects 12–14 V automotive harnesses and auxiliary circuits with reliable performance. Feature: 25 A amperage rating. Business Impact: Provides appropriate protection for mid-range automotive loads, minimizing nuisance trips while guarding wiring insulation. Application: Battery management and accessory circuits in light vehicles and fleets. Feature: 150 AIC interrupt rating. Business Impact: Improves short-circuit protection by interrupting high-energy faults quickly, reducing collateral damage and service costs. Application: High-energy automotive faults in wiring harnesses and power distribution leads. Feature: Type I ATC footprint. Business Impact: Delivers drop-in compatibility with standard automotive fuse blocks, accelerating installation and serviceability. Application: OEM and aftermarket installations requiring quick replacement in limited spaces. Feature: Packaging quantity 100. Business Impact: Supports bulk procurement and minimizes stocking cycles for repair shops and fleets. Application: Large-scale fleets, service centers, and distributor networks seeking efficient inventory management. Feature: 25 A with 14 Vdc operating range. Business Impact: Aligns with common automotive loads, ensuring predictable protection and easier compliance checks. Application: Vehicle electronics, lighting networks, and auxiliary circuits in passenger cars and light trucks.
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FAQs
The BK/CB221-25 uses a Type I ATC footprint for compatibility with standard automotive fuse blocks and ships in packaging quantities of 100, facilitating bulk deployments. Ensure the 14 Vdc system voltage and 25 A rating match the protected circuit load, and verify space constraints within the harness or enclosure before installation to minimize wiring rearrangements.
A 150 AIC interrupt rating means the CB221-25 can safely interrupt higher-energy fault currents typical of automotive DC systems, protecting wiring insulation and connected components. This reduces the risk of arc damage and component failure during a short circuit, supporting reliable protection for battery management and power distribution networks.
Yes. The CB221-25 is designed with a Type I ATC footprint, enabling straightforward drop-in compatibility with common automotive fuse blocks used in OEM and aftermarket installations, which helps shorten installation time and reduces the need for custom mounting adapters.
The data indicates compliance and certification details should be confirmed with Eaton directly. For exact standards (for example CE, ISO, or industry-specific automotive certifications), contact Eaton to obtain the official certificate of conformity and documentation for your region or application.
Using the CB221-25 can lower maintenance costs through improved short-circuit protection, reduce downtime from wiring damage, and streamline inventory with bulk packaging (100 units). Its compact form factor and ATC footprint enable faster field service and consistent protection across diverse vehicle platforms, contributing to lower total cost of ownership over time.