Eaton CB123-50HB automotive circuit breaker - Type III
Part Number: CB123-50HB
Quick Summary
The Eaton CB123-50HB automotive circuit breaker protects 25 Vdc DC circuits in vehicle power systems while delivering reliable interruption up to 50 A. This solution addresses the common challenge of selecting rugged, compact protection for space-constrained automotive enclosures without sacrificing performance. With Type III heavy-duty construction and RoHS compliance, it stands up to vibration, temperature swings, and regulatory requirements typical of modern vehicles. The combination of a robust 1.5 kAIC interrupt rating at 12 Vdc and a durable #10-32 TPI stud connection delivers dependable protection for critical wiring and components, helping reduce downtime and maintenance costs. Its compatibility with Bussmann series catalogs and clear technical documentation further accelerates sourcing and installation for engineering and procurement teams.
Product Information
Extended Description
CB123-50HB Eaton: Eaton Bussmann series C.B.123-HB automotive circuit breaker, 25 Vdc, 50A, 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
CB123-50HB
UPC
051712601689
Product Length/Depth
0.55 in
Product Height
2.1 in
Product Width
1.7 in
Product Weight
0.44 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
50 A
Interrupt rating
1.5 kAIC at 12 Vdc
Voltage rating
25 Vdc
Connection
#10-32 TPI stud
Bussmann series 4-foot automotive planogram no.10730
Bussmann series full line retail catalog no. 5084
Bussmann series full line retail catalog no. 5084
Bussmann series full line retail catalog no. 5084
Bussmann series Fuseology
Eaton Specification Sheet - CB123-50HB
Feature: 50 A amperage rating with 25 Vdc voltage rating and 1.5 kAIC interrupt rating at 12 Vdc. Business Impact: Protects high-priority DC circuits while enabling fast fault interruption to minimize electrical system damage and downtime. Application: Ideal for vehicle power distribution and auxiliary circuits in 12–24 V systems. The Eaton CB123-50HB provides reliable protection for critical loads in cars, trucks, and commercial vehicles without oversizing the protection device. Feature: #10-32 TPI stud connection and compact dimensions (0.55 in depth, 2.1 in height, 1.7 in width). Business Impact: Simplifies installation in tight automotive harness spaces and reduces mounting complexity. Application: Fits standard automotive fuse blocks and protected harnesses with easy replacement in service bays. Feature: Type III heavy-duty construction. Business Impact: Delivers rugged performance in high-vibration environments common to machinery and mobile equipment, reducing nuisance trips and ensuring consistent protection. Application: Heavy-duty automotive environments, including off-road and fleet operations. Feature: RoHS compliance. Business Impact: Supports regulatory compliance and environmental stewardship while enabling cross-border sourcing with electronics supply chains. Application: All RoHS-based manufacturing and repair workflows across automotive and industrial segments. Feature: Documentation and catalog compatibility. Business Impact: Streamlines procurement and BOM alignment with Bussmann series catalogs and Eaton datasheets, reducing sourcing time and technical risk. Application: Engineer-to-order environments requiring traceable specifications and fast part replacement. Feature: 25 Vdc operating range with 1.5 kAIC at 12 Vdc interrupt capacity. Business Impact: Keeps low-voltage automotive systems safe from short circuits and arcing, protecting wiring insulation and sensitive electronics. Application: DC power rails in vehicle electrical architectures, including battery management subsystems.
Get a Quick Quote for a Eaton CB123-50HB
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton CB123-50HB?
Enquire Now
FAQs
The CB123-50HB uses a #10-32 TPI stud connection, which aligns with standard automotive harnesses and protection blocks. Its compact dimensions support installation in tight vehicle enclosures, and the unit’s rugged Type III construction reduces the likelihood of vibration-induced nuisance trips. This combination supports straightforward retrofits and new builds with common DC power distributions.
Key specs include a 50 A amperage rating, 25 Vdc voltage rating, and a 1.5 kAIC interrupt rating at 12 Vdc. The device features a #10-32 TPI stud terminal for secure connections and a compact footprint (0.55 in depth, 2.1 in height, 1.7 in width). RoHS compliance ensures regulatory alignment across regions.
Yes. The CB123-50HB is designed with Type III heavy-duty construction and RoHS compliance, delivering reliable performance in vibration, temperature swings, and road conditions typical of automotive and fleet applications. Its rugged build supports long service life in trucks, buses, and off-road equipment while protecting critical DC circuits.
The CB123-50HB is RoHS compliant, aligning with environmental and regulatory standards for modern electronics. Documentation is available through Eaton’s specification sheets and catalog references, including the CB123-50HB datasheet and Bussmann series catalogs, which facilitate sourcing, BOM alignment, and installation planning.
By delivering fast, reliable fault interruption at 50 A and 25 Vdc, the CB123-50HB minimizes wiring damage, reduces unplanned downtime, and lowers maintenance costs. Its compact form, rugged build, and RoHS compliance support lower total cost of ownership through longer service life, easier replacements, and smoother regulatory compliance across fleets.