Eaton CB185P-150 Automotive Circuit Breaker - 3 kAIC
Part Number: CB185P-150
Quick Summary
The Eaton CB185P-150 automotive circuit breaker protects high-current automotive and panel circuits, safeguarding power trains and control systems. In harsh vehicle environments, mis-sizing breakers or cramped panel space can derail protection strategies and extend downtime. The unit is RoHS compliant and rated for 48 Vdc systems, delivering 150 A with a 3 kAIC interrupt rating, and it features a switchable Type III mechanism for easy reset after a fault. This combination supports reliable, code-compliant protection across automotive OEMs and retrofit installations. By aligning with the Eaton Bussmann series, it delivers common hardware interfaces, straightforward installation, and predictable performance, helping procurement standardize parts, reduce stocking complexity, and accelerate engineering deployment in demanding environments.
Product Information
Extended Description
CB185P-150 Eaton: Eaton Bussmann series C.B.185P automotive circuit breaker, Switchable, 48 Vdc, 150A, 3 kAIC, Type III, High amp
Product Name
Eaton Bussmann series CB185P automotive circuit breaker
Catalog Number
CB185P-150
UPC
051712593021
Product Length/Depth
1.9 in
Product Height
2.9 in
Product Width
2.1 in
Product Weight
0.18 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
150 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Mounting Method
Panel
Special features
Switchable
Bussmann series 4-foot automotive planogram no.10730
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Eaton Specification Sheet - CB185P-150
Feature → Business Impact → Application: The CB185P-150 delivers 150 A continuous rating with a 3 kAIC interrupt capacity for 48 Vdc circuits, enabling robust short-circuit protection without nuisance trips in demanding automotive and industrial control applications. This level of current handling supports power trains, chassis networks, and panel-fed protection, reducing risk of equipment damage and unscheduled downtime. In practice, engineers assign this breaker to feeders and distribution blocks where reliable, fast interruption is essential to meet OEM tolerances and warranty commitments. Switchable Type III design provides a manual reset capability after a fault, facilitating rapid diagnostics and reducing maintenance cycles. The predictable re-closure behavior minimizes operational surprises and supports service teams in high-demand environments. This translates to lower service costs and faster return-to-service in critical automotive and machinery installations. Panel mounting with a compact footprint supports ease of installation in constrained control panels, instrument clusters, and harness enclosures. The 1.9 in length, 2.9 in height, and 2.1 in width footprint, along with a lightweight 0.18 lb weight, simplifies routing and reduces panel depth requirements. RoHS compliance ensures alignment with regulatory standards across Europe and North America, helping engineers avoid late-stage design changes. This, combined with standard Bussmann series compatibility, reduces sourcing risk and accelerates procurement cycles for value-driven projects. Compatibility and ecosystem advantages include established Eaton Bussmann planograms and readily available datasheets, enabling consistent part numbering, ease of replacement, and streamlined field service.
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FAQs
CB185P-150 uses a panel-mount configuration designed to fit standard automotive protection panels. For installation, secure the unit in the designated panel slot, connect the input and output terminals to the appropriate power and load harnesses, and confirm the switchable mechanism is in the 'off' position before wiring. After wiring, re-check all connections and reset the switch to restore protection. The catalog number is CB185P-150 and the UPC is 051712593021 for ordering and inventory accuracy.
CB185P-150 provides a 150 A current rating, a 3 kAIC interrupt rating, and a 48 Vdc voltage rating. This means it can safely interrupt short-circuit events up to 3 kA at 48 Vdc, protecting automotive and panel circuits from damage due to overcurrent conditions. The 150 A rating ensures the device supports high-current feeders without nuisance tripping during normal operation.
Yes, CB185P-150 is designed for automotive 48 Vdc networks and panel protection, making it suitable for compact control panels, harness protection, and power-distribution points in vehicles and mobile equipment. Its switchable Type III mechanism aids maintenance and diagnostics, while its 3 kAIC interrupt rating provides robust protection against short circuits in demanding automotive environments.
CB185P-150 is RoHS compliant, addressing restrictions on hazardous substances in electrical equipment. The data does not specify SIL, CE, or IP certifications for this exact model. For broader regulatory alignment, confirm RoHS compliance and consult Eaton’s datasheet (CB185P-150) and factory support for any region-specific requirements or additional certifications that may be needed for your application.
With its switchable mechanism and panel-mount design, CB185P-150 simplifies fault isolation and post-trip servicing, reducing downtime. The 150 A, 3 kAIC ratings ensure reliable protection of high-current feeders, potentially lowering repair costs and extending equipment life. Standardization within the Eaton Bussmann family also supports lower spare-part diversity and faster procurement, contributing to a favorable return on investment over the device’s life cycle.