Eaton CB185P-120 Automotive Circuit Breaker - 3 kAIC
Part Number: CB185P-120
Quick Summary
Eaton CB185P-120 automotive circuit breaker protects 48 Vdc circuits in automotive and off-road systems. Engineers often battle nuisance trips and inconsistent protection in 48 V systems, especially where switchable protection is needed. RoHS compliant (factory confirmation); for broader certifications such as CE or IP ratings, confirm with Eaton on request. When you specify CB185P-120, you gain reliable protection with a compact panel-mount form factor, aligning with Bussmann series compatibility and long-term maintenance cost reductions.
Product Information
Extended Description
CB185P-120 Eaton: Eaton Bussmann series C.B.185P automotive circuit breaker, Switchable, 48 Vdc, 120A, 3 kAIC, Type III, High amp
Product Name
Eaton Bussmann series CB185P automotive circuit breaker
Catalog Number
CB185P-120
UPC
051712593014
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
120 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Mounting Method
Panel
Special features
Switchable
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Eaton Specification Sheet - CB185P-120
The CB185P-120 delivers 120 A protection with a 3 kAIC interrupt rating, enabling robust overcurrent protection for 48 Vdc automotive circuits, which reduces the risk of wiring damage and component failure. This translates into fewer field failures and lower warranty costs, while keeping critical vehicle electronics safe in demanding environments. The switchable feature simplifies maintenance and service intervals, allowing quick reselection of protection after inspection or replacement without disassembly. In panel-mount form, the unit fits standard automotive enclosures and Bussmann-series layouts, speeding up installation and reducing integration time for OEMs and service teams. RoHS compliance further minimizes hazardous substances in assemblies, supporting sustainability goals and regulatory alignment. The compact dimensions (1.9 in depth, 2.9 in height, 2.1 in width) and light 0.18 lb weight optimize space planning in crowded or compact harnesses. This product is designed for compatibility with Bussmann-series components, ensuring reliable spares availability and reduced stocking complexity for procurement teams.
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FAQs
CB185P-120 uses a panel mounting method designed to fit standard Bussmann-series enclosures. Its compact dimensions (1.9 in depth, 2.9 in height, 2.1 in width) facilitate easy integration into tight automotive harness spaces. Ensure the panel is rated for 48 Vdc and that the wiring harness matches the 120 A load profile to avoid overheating or nuisance trips.
CB185P-120 provides 120 A continuous current protection with a 3 kA interrupt rating (3 kAIC) and is rated for 48 Vdc. It is switchable, enabling field reset or reconfiguration after maintenance. These specs support dependable protection for critical 48 V automotive circuits while minimizing risk of damage during fault conditions.
The CB185P-120 is RoHS compliant with factory confirmation. While RoHS is confirmed, other certifications such as CE or IP ratings should be verified with Eaton for specific regional or application requirements. This ensures the part meets your regulatory and reliability standards before deployment in regulated environments.
Ideal for 48 Vdc automotive circuits, CB185P-120 suits powertrains, chassis electronics, and accessory networks in passenger cars, trucks, and off-road vehicles. It also fits industrial equipment with 48 Vdc rails, where space-constrained, switchable protection is valuable for rapid maintenance and consistent protection against short-circuits.
Switchable operation reduces service time by enabling quick reselection of protection after inspections. The high interrupt rating minimizes fault propagation, lowering downstream repair costs. RoHS compliance supports longer-term regulatory alignment and potential savings from fewer hazardous-material concerns, while the compact form factor simplifies inventory and spare-part management for procurement teams.