Eaton CB185-25 automotive circuit breaker - 3 kAIC
Part Number: CB185-25
Quick Summary
The Eaton CB185-25 automotive circuit breaker protects 48 Vdc automotive circuits in demanding environments. In the field, owners wrestle with water exposure, vibration, and mounting constraints that lead to nuisance trips and costly downtime. Key certifications include RoHS compliance and waterproof construction, with additional approvals such as CE or IP ratings available through Eaton on request. Its compact flush-mount design and switchable functionality support reliable OEM integration and simplified spares planning, delivering long-term cost savings and improved system uptime.
Product Information
Extended Description
CB185-25 Eaton: Eaton Bussmann series C.B.185 automotive circuit breaker, Switchable, 48 Vdc, 25A, 3 kAIC, Type III, High amp, Waterproof
Product Name
Eaton Bussmann series CB185 automotive circuit breaker
Catalog Number
CB185-25
UPC
051712501408
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
25 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 - CB185-25
Feature: 25 A amperage rating with a 3 kAIC interrupt rating. Business impact: Provides robust short-circuit protection for 48 Vdc automotive circuits, reducing damage and downtime. Application: Ideal for automotive electrical protection in vehicles and equipment where high current draws occur. Feature: Waterproof housing with flush mounting. Business impact: Enhances reliability in engine bays, outdoor equipment, and marine environments, enabling secure installation in tight spaces. Application: Off-road vehicles and outdoor machinery requiring protected, space-efficient mounting. Feature: Switchable design. Business impact: Allows quick reset after a fault, minimizing service time and operational disruption. Application: Field maintenance scenarios in heavy-duty vehicles and industrial fleets. Feature: Compact footprint (1.9 in L Ă— 2.9 in H Ă— 1.68 in W) with standard packaging. Business impact: Eases integration into crowded electrical enclosures and simplifies stocking with standard packaging. Application: OEM panels and retrofit applications with limited space. Feature: RoHS compliant with standard packaging. Business impact: Reduces regulatory risk and streamlines supply chain compliance. Application: Mass production and regulated environments requiring traceable components.
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FAQs
Install CB185-25 using a flush-mount approach in an enclosure designed for 48 Vdc automotive circuits. Ensure proper thermal clearance, secure mechanical mounting, and use appropriate connectors that match the catalog specifications (CB185-25). Verify that wiring respects the 25 A rating and that the unit is oriented for optimal heat dissipation and water ingress protection in the intended environment.
3 kAIC means the breaker can interrupt up to 3 kiloamps of fault current at its rated voltage without sustaining damage. This provides meaningful protection against high-current short circuits, preserving upstream components, reducing the risk of meltdown, and enabling safe, predictable disconnection in automotive and harsh-environment installations.
Yes. The CB185-25 is designed for rugged automotive environments and features waterproof construction suitable for exposure to water, moisture, and vibration. It can be deployed in off-road, utility, and light marine applications where 48 Vdc protection and reliable switching are required, though for extreme marine IP ratings please confirm final approvals with Eaton.
CB185-25 is RoHS compliant, aligning with material and hazard-free requirements. For additional certifications such as CE or IP ratings, contact Eaton directly to confirm current approvals and any product variations. This helps ensure the part meets your project’s regulatory and environmental requirements before procurement.
The CB185-25 is a rugged, resettable automotive protection device with a switchable feature that simplifies fault handling. In routine service, replace only after a confirmed fault or when performance degrades, and store spares with standard Eaton catalogs. The result is lower maintenance costs and quicker field recovery due to straightforward reset or replacement in compatible 48 V systems.