Eaton CB185P-135 Automotive Circuit Breaker - 3 kAIC

Part Number: CB185P-135
Manufacturer
Eaton
Part number
CB185P-135

Quick Summary

The Eaton CB185P-135 automotive circuit breaker protects vehicle electrical systems by interrupting faults at 48 V DC. Engineers often face space constraints, frequent vibration, and the need for reliable protection in compact enclosures. This unit is RoHS compliant and designed for panel mounting, delivering a switchable solution with a 3 kAIC interrupt rating. Its 135 A current rating and rugged construction support durable automotive protection while minimizing downtime. By combining a proven Bussmann series design with Eaton’s reliability, it delivers regulatory alignment and operational resilience for fleet, off-road, and OEM applications.

Product Information

Extended Description

CB185P-135 Eaton: Eaton Bussmann series C.B.185P automotive circuit breaker, Switchable, 48 Vdc, 135A, 3 kAIC, Type III, High amp
Product Name
Eaton Bussmann series CB185P automotive circuit breaker
Catalog Number
CB185P-135
UPC
051712624565
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
135A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Mounting Method
Panel
Special features
Switchable
The CB185P-135 uses a 135 A amperage rating to deliver precise protection for high-current automotive circuits, reducing the risk of equipment damage and unplanned downtime. In practice, this translates to improved reliability in harsh automotive environments and lower maintenance costs over the lifecycle of the vehicle or equipment. The 48 V DC operating voltage aligns with standard automotive power systems, enabling straightforward integration with existing wiring harnesses and controllers while maintaining safe, predictable interrupt behavior. With a 3 kAIC interrupt rating, the device can safely interrupt fast transients and short circuits, protecting sensitive electronics and battery systems from fault currents. The switchable functionality provides easy reset or isolation during service events, enhancing serviceability and reducing vehicle downtime during maintenance windows. Panel mounting offers a compact footprint suitable for dense enclosures, enabling OEMs to optimize space without sacrificing protection or accessibility. RoHS compliance ensures regulatory alignment across multiple markets and supports responsible supply-chain management, while keeping procurement straightforward for distributors and maintenance teams. These features collectively improve efficiency, compliance, and total cost of ownership for automotive protection schemes.

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FAQs

The CB185P-135 is designed for panel mounting in automotive enclosures, allowing direct integration with standard wiring harnesses. Use the panel mounting method specified and secure with appropriate hardware. Its 48 Vdc rating and 3 kAIC interrupt capability support safe fault isolation, while the switchable feature enables easy servicing without removing the entire assembly.
Key specs include a 135 A amperage rating, 48 Vdc voltage rating, 3 kAIC interrupt rating, and a switchable, Type III design. These figures dictate protective thresholds, fault handling, and reset behavior, ensuring compatibility with automotive power systems and protecting high-current circuits from short circuits and faults.
Yes, the_CB185P-135 is RoHS compliant, aligning with regulatory requirements for hazardous substances. While RoHS compliance is confirmed, for additional certifications or region-specific requirements (such as CE or IP ratings), consult Eaton or the product catalog to determine availability and certification scope applicable to your application.
Plan for a panel-mount installation in compact automotive enclosures to maximize space efficiency. Ensure wiring follows the 48 Vdc circuit design, use appropriate gauge conductors, and provide adequate clearance for heat dissipation. The switchable feature simplifies maintenance by enabling rapid disconnection without full disassembly, reducing service time.
The 135 A, 3 kAIC protection reduces the likelihood of costly electrical faults and equipment damage, lowering downtime in fleets. The panel-mount design and switchable operation simplify routine maintenance and service, translating to lower labor costs and faster repair times, ultimately improving uptime and total cost of ownership.