Eaton CB123-20HB automotive circuit breaker - 1.5 kAIC

Part Number: CB123-20HB
Manufacturer
Eaton
Part number
CB123-20HB

Quick Summary

CB123-20HB automotive circuit breaker protects DC power lines in automotive and industrial control systems. Engineers often grapple with nuisance trips, wiring damage, and downtime from overcurrent events, which this device helps prevent. RoHS compliant, Type III construction with a rugged 26 Vdc rating and 1.5 kAIC at 12 Vdc provides robust, regulatory-aligned protection. Lightweight yet durable, it delivers reliable performance without compromising installation flexibility in panels or enclosures. For procurement teams, this translates to predictable maintenance intervals, reduced repair costs, and smoother integration into DC power distribution schemes.

Product Information

Extended Description

CB123-20HB Eaton: Eaton Bussmann series C.B.123-HB automotive circuit breaker, 26 Vdc, 20A, 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
CB123-20HB
UPC
051712601658
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
20 A
Interrupt rating
1.5 kAIC at 12 Vdc
Voltage rating
26 Vdc
Connection
#10-32 TPI stud
Feature: 26 Vdc voltage rating and 20 A amperage rating. Business Impact: Delivers precise overcurrent protection for DC circuits, reducing the risk of electrical damage and downtime. Application: Ideal for DC power distribution in automotive and industrial control panels, including 12 V and 26 Vdc systems. Feature: 1.5 kAIC interrupt rating at 12 Vdc. Business Impact: Ensures rapid interruption of fault currents, minimizing wiring insulation wear and component stress. Application: Vital for high-current automotive loads and harsh automotive environments where transient faults are common. Feature: Type III, heavy-duty construction. Business Impact: Enhanced vibration tolerance and mechanical resilience, extending service life in harsh environments. Application: Automotive under-hood and rugged industrial applications where consistent protection is required. Feature: RoHS compliant. Business Impact: Supports regulatory compliance and safer procurement, reducing potential compliance risks. Application: Parts consolidation for regulated manufacturing and electronics assembly. Feature: #10-32 TPI stud connection. Business Impact: Simplifies installation and improves mechanical reliability with standard automotive fasteners. Application: Quick field replacement and reliable connections in tight electrical housings. Feature: Compact dimensions (0.55 in depth, 2.1 in height, 1.7 in width) and 0.44 lb weight. Business Impact: Enables space-saving installation in compact control cabinets and vehicle junction boxes. Application: Enabling DC protection in constrained enclosures and tight automotive wiring layouts. Feature: Eaton Bussmann series ecosystem including datasheets and planograms. Business Impact: Streamlined procurement, compatibility, and access to installation resources. Application: Design and spec phases for engineers and buyers in automation projects.

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FAQs

CB123-20HB uses a standard #10-32 TPI stud connection, facilitating straightforward panel or enclosure mounting. Its compact depth of 0.55 in and overall footprint (2.1 in high, 1.7 in wide) allow installation in tight automotive and industrial control cabinets. The 0.44 lb weight helps minimize mounting strain while providing reliable mechanical retention.
The device is rated for 26 Vdc with a 20 A current rating and an interrupt capacity of 1.5 kAIC at 12 Vdc. These ratings enable robust protection for DC power circuits in automotive and industrial environments, and they support frequent switching and fault conditions without compromising system integrity.
Yes. The CB123-20HB is designed for automotive DC protection, offering Type III heavy-duty performance and a rugged 26 Vdc rating. Its RoHS compliance and standard stud connection simplify integration into vehicle electrical harnesses and DC distribution blocks, delivering dependable protection against overcurrent in demanding automotive applications.
CB123-20HB is RoHS compliant, helping customers meet regulatory and sustainability requirements for electronic components. The data does not specify CE, SIL, or IP certifications; for confirmation on additional certifications, consult the factory or Eaton’s technical resources.
Key resources include the Eaton Specification Sheet for CB123-20HB, Bussmann catalogs and planograms, and the Bussmann Fuseology video. Access links include the Eaton product page, the full-line catalog, and the planogram PDF, along with the YouTube Fuseology resource for practical installation guidance.