Eaton BK/CB185-50 CB185 automotive circuit breaker - 3 kAIC
Part Number: BK/CB185-50
Quick Summary
Eaton CB185 automotive circuit breaker protects 48 Vdc circuits by interrupting fault currents. In automotive and industrial harnesses, tight spaces and harsh conditions often challenge reliable protection, but this unit is designed to meet those demands. It offers RoHS compliance and a waterproof design, with Type III, switchable operation to simplify maintenance in the field. Flush mounting and standard packaging help streamline installation, while 6-pack quantities support fleet-style procurement and stock optimization. With these characteristics, engineers can reduce downtime, improve system reliability, and standardize protection across multiple vehicle platforms and power distributions. This makes it a practical choice for 48 V automotive protection and rugged DC circuit control applications.
Product Information
Extended Description
BK/CB185-50 Eaton: Eaton Bussmann series C.B.185 automotive circuit breaker, 48 Vdc, 50A, 3 kAIC, Type III, Switchable, Waterproof
Product Name
Eaton Bussmann series CB185 automotive circuit breaker
Catalog Number
BK/CB185-50
UPC
051712502160
Product Length/Depth
1.9 in
Product Height
2.9 in
Product Width
1.68 in
Product Weight
0.23 lb
Compliances
RoHS Compliant Contact factory
Amperage Rating
50 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Material
Waterproof
Packaging Type
Standard
Mounting Method
Flush
Quantity
6
Used with
SEMS nuts
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Eaton Specification Sheet - BK/CB185-50
Feature → Business Impact → Application: 50 A amperage rating with a 3 kAIC interrupt rating provides robust fault protection for 48 Vdc automotive circuits, reducing the risk of arc-related damage and downtime in critical power rails. This translates to improved vehicle reliability and lower service costs in fleet maintenance and off-road equipment. Application: ideal for automotive power distribution and electrical control systems that demand reliable DC protection at moderate currents. Feature → Business Impact → Application: Waterproof housing and Type III switchable design enable dependable operation in exposed or wet environments, extending service life in marine, agricultural, or heavy-duty automotive contexts. Application: use in outdoor harnesses, weather-exposed panels, and wet workshop environments. Feature → Business Impact → Application: Flush mounting and compact form factor simplify integration into tight control panels and crowded junction boxes, accelerating installation and reducing panel depth. Application: suited for compact automotive controllers and engine bay protection modules. Feature → Business Impact → Application: Standard packaging (6 units) supports easy stocking and quick replacement, reducing downtime during routine maintenance and battery protection upgrades. Application: procurement-ready for fleets and OEMs seeking modular protection solutions. Feature → Business Impact → Application: RoHS compliance ensures regulatory alignment and easier supplier qualification, lowering risk during audits and cross-border manufacturing. Application: compliance-focused deployments across automotive and industrial electronics.
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FAQs
Yes. BK/CB185-50 is designed for flush mounting in standard automotive panels and is specified for use with SEMS nuts, enabling quick, secure mounting in crowded enclosures and control cabinets common to vehicle electrical systems.
The device is a 50 A, 48 Vdc automotive circuit breaker with a 3 kAIC interrupt rating. It protects DC power circuits from overcurrent faults, reducing the risk of wiring insulation damage and component failure in automotive power distribution networks.
Ideal for 48 V DC automotive harnesses, engine bay power circuits, and rugged outdoor or marine installations where waterproof protection and reliable overcurrent interruption are required, particularly in fleets or OEM integration projects.
The unit is RoHS compliant, supporting regulatory alignment for modern electronics and automotive assemblies. For additional certifications beyond RoHS, users should contact the factory to confirm project-specific requirements.
With robust protection, waterproof construction, and standard packaging, BK/CB185-50 minimizes unplanned outages and simplifies stocking for quick replacements. This leads to reduced maintenance costs, faster service turnaround, and improved overall fleet uptime.