Eaton CBC-50B Automotive Circuit Breaker - 1.5 kAIC Type I
Part Number: CBC-50B
Quick Summary
CBC-50B automotive circuit breaker from Eaton protects 14 Vdc automotive circuits, delivering reliable DC protection for harnesses and power rails. Engineers often struggle with space constraints, vibration, and maintaining reliable interrupt performance in compact vehicle systems. Compliance details vary by market; typical automotive protection devices align with CE markings and generic IP/SIL expectations, so confirm regional certifications with Eaton. Beyond protection, this device supports straightforward installation with standard #10-32 TPI studs and a compact form factor, enabling faster deployment and predictable lifecycle costs. With 14 Vdc operation, 50 A rating, and a 1.5 kAIC interrupt rating, the CBC-50B delivers proven reliability for critical DC circuits in vehicles.
Product Information
Extended Description
CBC-50B Eaton: Eaton Bussmann series CBC-B automotive circuit breaker, 14 Vdc, 50 A, 1.5 kAIC, Type I, 10-32 TPI stud
Product Name
Eaton Bussmann series CBC-B automotive circuit breaker
Catalog Number
CBC-50B
UPC
051712271240
Product Length/Depth
14.75 in
Product Height
7.5 in
Product Width
9.25 in
Product Weight
0.5 lb
Compliances
Contact factory
Amperage Rating
50 A
Interrupt rating
1.5 kAIC
Voltage rating
14 Vdc
Connection
#10-32 TPI stud
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Eaton Specification Sheet - CBC-50B
Feature: 14 Vdc voltage rating aligns with common automotive power rails; Business Impact: Ensures compatible protection for everyday engine bay circuits and battery feeds; Application: 12-24 V automotive DC systems and harnesses. Feature: 50 A amperage rating; Business Impact: Provides robust protection for high-current loads while minimizing nuisance trips; Application: power distribution to starters, pumps, and accessory circuits. Feature: 1.5 kAIC interrupt rating; Business Impact: Fast fault clearance reduces wiring damage and risk of fire in fault conditions; Application: short-circuit protection in rugged vehicle environments. Feature: Type I trip characteristic; Business Impact: Predictable opening behavior reduces unexpected outages and simplifies diagnostics; Application: inline protection for critical DC circuits. Feature: #10-32 TPI stud connection; Business Impact: Easy, secure mounting and reliable electrical contact with standard hardware; Application: engine compartments and protected enclosures. Feature: CBC-B automotive line compatibility; Business Impact: Streamlines parts selection and stocking with a consistent protection family; Application: systems that require coordinated DC protection across multiple branches. Feature: Dimensions and packaging support installation planning; Business Impact: Clearancing and mounting considerations are straightforward for enclosure design and service access; Application: retrofits and new automotive control architectures.
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FAQs
Install CBC-50B using standard #10-32 tightening hardware with appropriate torque per Eaton’s installation guidelines. Ensure the stud connections are clean and snug to maintain low contact resistance. Plan for adequate clearance around the 14.75 in depth and provide vibration-resistant mounting to preserve contact integrity in engine compartments.
CBC-50B operates at 14 Vdc with a 50 A current rating and an interrupt rating of 1.5 kAIC. It features a Type I trip characteristic and a #10-32 TPI stud connection. Verify these ratings align with your circuit’s maximum load, allowable fault current, and long-term durability requirements in your 12–24 V automotive DC system.
Yes, for typical automotive DC protection contexts, including engine bay and harness protection. The device’s 1.5 kAIC interrupt rating supports rapid fault clearance, while the Type I trip provides predictable operation under vibration and temperature variations common in vehicles. Always confirm regional certifications with Eaton to meet local regulatory requirements.
Compliances for CBC-50B are listed as contact factory, so certification availability (such as CE, IP, or SIL) can vary by market. To ensure your installation meets regional requirements, request current certification data from Eaton for your location and application, and document the exact standards adopted in your procurement package.
The CBC-50B delivers durable DC protection with a clear fault-clear path, reducing wiring damage and downtime during faults. Its robust connection (10-32 studs) and compatibility within the CBC-B family simplify stocking and maintenance, lowering total cost of ownership through fewer reseats, reduced field faults, and faster service in fleet operations.