Eaton BK/CB185-80 automotive circuit breaker - 3 kAIC
Part Number: BK/CB185-80
Quick Summary
The Eaton BK/CB185-80 automotive circuit breaker provides essential overcurrent protection for 48 V automotive electrical systems. Engineers often struggle with reliable, weatherproof protection in tight, harsh vehicle environments where space is limited and downtime is costly. This unit is RoHS compliant and designed for waterproof operation, featuring an 80 A rating and a 3 kAIC interrupt capacity for robust short-circuit protection. With flush mounting and SEMS-nut compatibility, it installs quickly in compact panels, supporting easy maintenance and serviceability in fleet and off-road applications.
Product Information
Extended Description
BK/CB185-80 Eaton: Eaton Bussmann series C.B.185 automotive circuit breaker, 48 Vdc, 80A, 3 kAIC, Type III, Switchable, Waterproof
Product Name
Eaton Bussmann series CB185 automotive circuit breaker
Catalog Number
BK/CB185-80
UPC
051712846660
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
80 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/CB185-80
Feature: 48 Vdc, 80 A electrical rating provides robust overcurrent protection for 48 V automotive power buses. Business impact: minimizes risk of wiring damage, battery drain during faults, and costly downtime. Application: suitable for protected circuits in automotive control modules, lighting, sensors, and accessory power in fleets and rugged vehicles. Feature: 3 kAIC interrupt rating delivers high fault-current endurance. Business impact: reduces cascading failures and protects downstream components in automotive harnesses. Application: ideal for protection of power distribution networks where fault currents can spike. Feature: Waterproof housing and sealed contacts improve reliability in wet or dusty environments. Business impact: maintains protective performance in outdoor and exposed installations, lowering maintenance needs. Application: suitable for under-hood, exterior panels, and off-road vehicle enclosures. Feature: RoHS compliant ensures regulatory alignment across multiple regions. Business impact: simplifies supplier qualification and OEM procurement. Application: appropriate for automotive original equipment and aftermarket assemblies meeting environmental standards. Feature: Flush mounting and standard packaging (six units per package) streamline panel design. Business impact: reduces installation time, space usage, and assembly costs. Application: practical for compact control panels in fleets and commercial vehicles. Feature: SEMS-nut compatibility enhances field serviceability. Business impact: enables quick, secure mounting and easier replacement in service operations. Application: integrates with common automotive enclosure hardware for rapid maintenance.
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FAQs
The BK/CB185-80 is designed for flush mounting and uses SEMS nuts for fast, secure installation. With a 1.9 in depth, 2.9 in height, and 1.68 in width footprint, it fits tight panels while maintaining reliable contact integrity. Ensure proper sealing to preserve waterproof performance in exposed locations.
Key ratings are 48 Vdc operating voltage, 80 A continuous current, and a 3 kAIC interrupt capacity. These values protect automotive power distribution and accessory circuits from overcurrent and short-circuit faults, reducing damage to wiring harnesses and critical components.
Yes. Its 48 Vdc rating, high interrupt capacity, waterproof construction, and rugged mounting options make it well suited for fleet vehicles, off-road equipment, and other demanding automotive environments where reliable protection and ease of maintenance are essential.
The unit is RoHS compliant, aligning with environmental and regulatory requirements in many regions. For additional certifications such as CE or IP ratings, please confirm with the factory to ensure compatibility with your specific application and region.
By delivering robust protection with high fault-current tolerance and waterproof durability, the BK/CB185-80 reduces downtime, limits wiring and component damage, and simplifies field servicing with easy mounting. This translates to lower maintenance costs and more reliable vehicle operation over the lifecycle.