Eaton CB123-30HB Automotive Circuit Breaker - 1.5 kAIC
Part Number: CB123-30HB
Quick Summary
Eaton CB123-30HB automotive circuit breaker protects 28 Vdc vehicle power networks from faults. Engineers often struggle with nuisance trips and space-constrained installations in automotive harnesses. This device delivers 1.5 kAIC at 12 Vdc and features Type III rugged construction with RoHS compliance. Its compact 0.55 in depth and #10-32 TPI stud connections simplify installation in tight automotive panels. With consistent protection from Eaton’s Bussmann series, procurement is streamlined and maintenance costs are reduced. This makes it an attractive option for fleets and service providers seeking durable automotive protection. Note RoHS compliance ensures regulatory alignment in Europe and Asia as part of your supply chain. Rugged design supports automotive environments with vibration and temperature variations typical in commercial vehicles. This combination of protection, size, and standard connections simplifies field retrofits.
Product Information
Extended Description
CB123-30HB Eaton: Eaton Bussmann series C.B.123-HB automotive circuit breaker, 28 Vdc, 30A, 1.5 kAIC at 12 Vdc, Type III, Heavy duty, 10-32 TPI stud
Product Name
Eaton Bussmann series CB123-HB automotive circuit breaker
Catalog Number
CB123-30HB
UPC
051712601665
Product Length/Depth
0.55 in
Product Height
2.1 in
Product Width
1.7 in
Product Weight
0.44 lb
Compliances
RoHS Compliant Contact factory
Amperage Rating
30 A
Interrupt rating
1.5 kAIC at 12 Vdc
Voltage rating
28 Vdc
Connection
#10-32 TPI stud
Bussmann series 4-foot automotive planogram no.10730
CB123-30HB~AUTOMOTIVE CIRCUIT BREAK
CB123-30HB~AUTOMOTIVE CIRCUIT BREAK
Bussmann series Fuseology
Eaton Specification Sheet - CB123-30HB
Feature: 28 Vdc operating voltage with a 30 A rating and 1.5 kAIC at 12 Vdc. Business Impact: Delivers rapid fault interruption to protect critical loads and minimize collateral damage in high-current automotive circuits. Application: Ideal for 28 Vdc vehicle power distribution in trucks, fleets, and equipment that demand reliable short-circuit protection. This aligns with long-tail terms like automotive circuit protection and high-current protection. Feature: Type III rugged construction with RoHS compliance. Business Impact: Enhances durability in vibration and temperature fluctuations, reducing unscheduled downtime and ensuring regulatory readiness. Application: Suitable for heavy-duty automotive applications where compliance and reliability matter, including fleet maintenance and on-site service. Feature: Compact footprint with 0.55 in depth and a 1.7 Ă— 2.1 in profile and #10-32 TPI stud connections. Business Impact: Facilitates installation in constrained panels and simplifies mounting in harness routing. Application: Beneficial for space-limited cabinets and module integrations in motorcycles, vans, and compact trucks. Feature: 10-32 TPI stud connection and robust mounting options. Business Impact: Enables quick, secure wiring and minimizes installation time, reducing total cost of ownership. Application: Works with standard automotive harnesses and service procedures, streamlining procurement and spares management. Feature: RoHS compliance and Bussmann-series compatibility. Business Impact: Supports environmental compliance and simplifies supplier management across global projects. Application: Ideal for multi-region deployment in Europe, Asia, and North America where RoHS conformity is a procurement criterion.
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FAQs
CB123-30HB uses standard #10-32 TPI stud connections and occupies a compact footprint (0.55 in depth, 1.7 in x 2.1 in). For installation, ensure panel clearance and proper stud grounding, use appropriate bus bars or mounting hardware, and route harnesses to minimize vibration exposure. The design supports vehicle-grade environments while maintaining reliable electrical contact in tight spaces.
1.5 kAIC at 12 Vdc is the interrupt rating, meaning the breaker can safely interrupt a short-circuit current up to 1,500 amperes at 12 Vdc. This provides robust protection for high-current automotive loads, helps prevent wiring insulation damage, and reduces the risk of cascading faults in power distribution networks.
Yes. The CB123-30HB is designed as a Type III, heavy-duty automotive circuit breaker rated for 28 Vdc, with a 30 A load rating and 1.5 kAIC interrupt capability. Its rugged construction, compact form factor, and RoHS compliance make it a reliable choice for fleets, off-road equipment, and other harsh-duty applications where space and durability matter.
The CB123-30HB is RoHS compliant, supporting environmental and regulatory alignment. For additional certifications beyond RoHS, consult Eaton directly or your regional distributor to confirm any region-specific approvals or testing that may be required for your application.
The CB123-30HB reduces maintenance overhead by delivering reliable, low-maintenance protection with a robust interrupt rating, durable Type III construction, and a compact footprint that simplifies installation. Its compatibility with the Bussmann series streamlines procurement, parts stocking, and service planning, contributing to lower downtime and a more predictable total cost of ownership.