Eaton CB285P-120 Marine Rated Circuit Breaker - 3 kAIC
Part Number: CB285P-120
Quick Summary
The Eaton CB285P-120 marine rated circuit breaker delivers reliable overcurrent protection for 48 Vdc systems in marine, automotive, and offshore installations. Engineers often struggle with waterproof enclosures, salt air, and compact panel spaces where fast, dependable trips are essential. This RoHS compliant unit is designed for marine duty, featuring a 3 kAIC interrupt rating and switchable operation to simplify maintenance. By combining rugged waterproof construction with a compact panel footprint, it helps protect critical circuits while reducing downtime and service costs. For businesses, it means safer, compliant power distribution with easier installation and consistent performance in harsh environments.
Product Information
Extended Description
CB285P-120 Eaton: Eaton Bussmann series C.B.285P marine rated circuit breaker, Switchable, 48 Vdc, 120A, 3 kAIC, Automotive, Type III, High amp, Single-pole, Waterproof
Product Name
Eaton Bussmann series CB285P marine rated circuit breaker
Catalog Number
CB285P-120
UPC
051712741811
Product Length/Depth
1.9 in
Product Height
2.91 in
Product Width
1.77 in
Product Weight
0.175 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
120 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Material
Waterproof
Number of poles
Single-pole
Packaging Type
Standard
Mounting Method
Panel
Special features
Switchable
Bussmann series full line retail catalog no. 5084
Bussmann series full line retail catalog no. 5084
Bussmann series Fuseology
Eaton Specification Sheet - CB285P-120
Feature → Business Impact → Application: 48 Vdc rating and 120 A capacity deliver precise protection for high-current, low-voltage marine circuits, reducing nuisance trips and extending component life in boat and offshore equipment. This enables more reliable starting and operation of critical systems such as lighting, navigation, and propulsion controls in demanding environments. Feature → 3 kAIC interrupt rating provides robust fault protection against short circuits, improving crew safety and minimizing collateral damage in engine rooms and control panels. Application: marine electrical protection in engine compartments, auxiliary power panels, and vehicle electrical bays. Feature → Waterproof, single-pole design with panel mounting supports rugged, corrosion-resistant installations in confined spaces; installation is straightforward, minimizing commissioning time. Application: compact panel upgrades and retrofits in marine dashboards and control enclosures. Feature → Switchable functionality offers quick reset/disable for maintenance cycles without replacing fuses, lowering maintenance costs and downtime. Application: serviceable protection for critical circuits in offshore rigs and boats. Feature → RoHS compliant construction ensures regulatory alignment and traceable material sourcing, aiding compliance documentation and supplier audits. Application: procurement and quality programs for industrial fleets and marine equipment.
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FAQs
The CB285P-120 uses a panel mounting method designed for compact enclosures common in marine and automotive panels. Its single-pole construction and standard dimensions (1.9 in depth, 2.91 in height, 1.77 in width) simplify retrofit projects and allow straightforward integration with existing Bussmann series protection schemes. Ensure panel cutouts and mounting hardware align with the unit's footprint for secure operation.
The CB285P-120 is rated for 48 Vdc operation with a 120 A amperage rating and a 3 kAIC interrupt rating. These specs enable effective protection for high-current 48 V systems while providing fast, reliable interruption of fault currents to minimize damage in marine and automotive power circuits.
Yes. The CB285P-120 is designed as a marine rated, waterproof circuit breaker for 48 Vdc circuits up to 120 A. Its rugged construction, switchable feature, and single-pole configuration make it ideal for protecting critical marine electronics, navigation systems, and auxiliary power circuits within harsh, salt-air environments.
The CB285P-120 is RoHS compliant, ensuring restricted use of hazardous substances and supporting sustainability and regulatory reporting. For additional standards or certifications beyond RoHS, consult the manufacturer or product datasheet to confirm suitability for your specific jurisdiction or project requirements.
Switchable operation, robust waterproof construction, and a 3 kAIC interrupt rating reduce downtime during servicing and limit damage from faults, contributing to lower maintenance and replacement costs. Its panel-mount design also accelerates installation and upgrades, delivering faster time-to-protection and improved fleet reliability in marine environments.