Eaton CB185-90 Automotive Circuit Breaker - 3 kAIC
Part Number: CB185-90
Quick Summary
The Eaton CB185-90 automotive circuit breaker protects 48 V DC electrical systems in automotive and mobile equipment. When wiring harnesses experience surges or moisture, nuisance trips and downtime can spike, driving maintenance costs and unwelcome idle time. This device leverages RoHS-compliant construction and a rugged waterproof housing to withstand harsh environments, while its switchable design simplifies servicing. While additional regional approvals like CE or IP ratings should be confirmed with the factory, the CB185-90 is built for reliable performance in controlled automotive panels. In practice, it supports efficient panel design and fleet maintenance programs by reducing unexpected outages and enabling straightforward part replacement in the field.
Product Information
Extended Description
CB185-90 Eaton: Eaton Bussmann series C.B.185 automotive circuit breaker, Switchable, 48 Vdc, 90A, 3 kAIC, Type III, High amp, Waterproof
Product Name
Eaton Bussmann series CB185 automotive circuit breaker
Catalog Number
CB185-90
UPC
051712621519
Product Length/Depth
1.9 in
Product Height
2.9 in
Product Width
1.68 in
Product Weight
0.23 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
90 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Material
Waterproof
Packaging Type
Standard
Mounting Method
Flush
Special features
Switchable
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Eaton Specification Sheet - CB185-90
Feature → Business Impact → Application: The CB185-90 delivers a 90 A amperage rating with a 3 kAIC interrupt capacity, enabling reliable protection for high-draw automotive circuits and minimizing wiring damage during fault events. This translates to reduced warranty costs and less downtime for fleets and service providers, especially in emergency response or field operations where reliability is critical. Application context includes automotive control panels, off-road vehicles, and electric power distribution within mobile equipment, where rapid fault isolation is essential. Feature → Business Impact → Application: Waterproof housing and durable construction improve environmental resilience in wet or dusty conditions, lowering the risk of moisture-related trips and corrosion. This supports long service intervals and lower maintenance labor costs in marine, farming, and construction environments. Feature → Business Impact → Application: Switchable functionality and flush mounting simplify installation and retrofit projects, enabling faster commissioning and easier diagnostics in both new builds and legacy systems. Feature → Business Impact → Application: The compact Bussmann series form factor and standard packaging enable compatibility with existing automotive fuse boards and control panels, reducing redesign costs and stock diversity. Feature → Business Impact → Application: RoHS compliance ensures regulatory alignment across regions, easing procurement and supporting sustainability goals, while “Contact factory” guidance for additional approvals helps ensure proper safety certification in regulated markets. Feature → Business Impact → Application: The 1.9 in depth, 2.9 in height, and 1.68 in width provide a balanced footprint for crowded enclosures, allowing engineers to optimize space without sacrificing protection or performance.
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FAQs
Yes. CB185-90 is designed for flush mounting, aligning with standard automotive control panels. Its compact dimensions (1.9 in depth, 2.9 in height, 1.68 in width) and 90 A rating support integration into crowded enclosures while preserving accessibility for switching and testing without requiring major panel redesign.
CB185-90 provides a 90 A amperage rating, a 3 kAIC interrupt rating, and a 48 Vdc voltage rating. These specifications enable reliable protection for automotive DC circuits, fast fault isolation, and compatibility with 48 V vehicle electrical architectures typically found in modern automotive and off-road applications.
Yes. The unit’s waterproof construction and rugged build are suited for harsh conditions found in off-road and rugged vehicle applications. Its switchable functionality allows quick resets after fault clearance, reducing downtime and enabling rapid field service in demanding environments.
CB185-90 is RoHS compliant, with the manufacturer recommending confirmation of additional approvals (such as CE or specific IP ratings) with Eaton for regional requirements. This approach helps ensure regulatory alignment in different markets while maintaining confidence in environmental and safety standards.
The switchable, high-capacity breaker reduces downtime by enabling quick isolation and replacement, while the rugged waterproof design cuts corrosion-related failures in wet or dusty conditions. Its compact footprint and standard packaging lower stocking complexity and maintenance costs, delivering favorable total cost of ownership over fleet lifecycles.