Eaton CB285P-50 Marine Rated Circuit Breaker - Waterproof
Part Number: CB285P-50
Quick Summary
The Eaton CB285P-50 marine rated circuit breaker protects 48 Vdc power circuits in challenging marine and rugged vehicle environments. This single-pole, switchable device addresses the pain of unpredictable surges and water exposure by delivering reliable overcurrent protection in a compact package. Built for harsh conditions, it leverages waterproof construction and a Type III high-amp design to minimize nuisance trips and maintenance. RoHS compliant and cataloged as part of Eaton’s Bussmann series, the CB285P-50 balances performance with serviceability. For engineers and procurement teams, this means fewer component changes, easier panel integration, and predictable protection aligned with automotive and marine electrical standards.
Product Information
Extended Description
CB285P-50 Eaton: Eaton Bussmann series C.B.285P marine rated circuit breaker, Switchable, 48 Vdc, 50A, 3 kAIC, Automotive, Type III, High amp, Single-pole, Waterproof
Product Name
Eaton Bussmann series CB285P marine rated circuit breaker
Catalog Number
CB285P-50
UPC
051712741118
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
50 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 complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - CB285P-50
Feature: 50 A amperage rating with a 3 kAIC interrupt rating provides solid overcurrent protection for typical marine and automotive load profiles. Business impact: Reduces the risk of electrical fires and equipment damage during transient faults, improving overall system reliability in harsh environments. Application: Ideal as main or branch protection for 48 Vdc circuits in boats, commercial vehicles, and rugged industrial panels; supports protective coordination with other Bussmann series devices. Feature: Single-pole, switchable design with Type III high-amp protection delivers easy control and selective tripping. Business impact: Operators can isolate a circuit quickly without disrupting adjacent loads, lowering downtime during maintenance. Application: Suitable for panel-mounted protection in compact electrical enclosures where space is at a premium in marine or off-road electrical systems. Feature: Waterproof housing and marine-rated construction resist moisture ingress and corrosion. Business impact: Extends service intervals and reduces corrosion-related failures in saltwater or humid installations. Application: Fortified for boat electrical systems, outdoor equipment, and RVs where exposure to water is routine. Feature: Compact footprint with panel mounting method (1.9 in depth, 1.77 in width, 2.91 in height) and light 0.175 lb weight. Business impact: Enables easy retrofit and low-added mass in lightweight applications, improving installation speed and reliability. Application: Fits tight panel bays in electrical control cabinets and instrument panels without rework. Feature: RoHS compliant and comes from Eaton's Bussmann series with standard catalog references. Business impact: Ensures regulatory alignment and easier procurement; compatibility with existing fuses and breakers improves lifecycle management. Application: Widely compatible with automotive, marine, and industrial control architectures seeking standards compliance. Feature: Diverse documentation and data, including UPC and full specification sheets. Business impact: Provides traceability and fast reference during design validation and field support; improves sourcing confidence for procurement teams. Application: Useful across engineering design reviews and maintenance planning.
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FAQs
Install CB285P-50 by mounting it in a standard single-pole panel cutout designed for Bussmann series breakers and securing it with the panel mounting method. The unit measures 1.9 in deep, 1.77 in wide, and 2.91 in tall, weighing 0.175 lb. Connect the line to the input and the load to the output, verify 48 Vdc, and energize.
The CB285P-50 offers a 50 A amperage rating, 3 kAIC interrupt rating, and 48 Vdc voltage rating. It is a single-pole, switchable device with waterproof construction, delivering reliable overcurrent protection while allowing straightforward isolation for maintenance in demanding environments.
Yes. The CB285P-50 is specifically designed for marine electrical systems and rugged automotive or industrial panels where exposure to water and vibration is common. Its 48 Vdc rating matches typical marine/automotive power supplies, and the switchable design simplifies maintenance and system troubleshooting in harsh environments.
RoHS compliance is specified for this model, supporting regulatory alignment. For additional certifications such as CE or IP ratings, confirm with Eaton directly, as the available data emphasizes RoHS and marine applicability. Always verify project-specific regulatory requirements with the supplier before procurement.
Using CB285P-50 can reduce downtime by delivering reliable protection and quick circuit isolation. Its compact, panel-friendly footprint simplifies installation, while the precise 50 A/3 kAIC rating helps optimize protection budgets. Over time, this can lower spare-part costs and improve fleet or vessel uptime in demanding environments.