Eaton CB123-15B circuit breaker - Type III, Heavy Duty
Part Number: CB123-15B
Quick Summary
The Eaton CB123-15B circuit breaker protects DC automotive circuits by interrupting faults in 23 Vdc systems. Engineers often grapple with nuisance trips and wiring damage caused by transient spikes in power networks, leading to downtime and repair costs. RoHS compliance is ensured, and additional certifications can be requested through Eaton for broader regulatory coverage. By choosing this device, you gain reliable protection against shorts and overloads, improved uptime, and streamlined maintenance when used with other Bussmann series components in vehicle harnesses and power distribution layouts. Compact form factor—0.58 in depth—facilitates installation in tight enclosures, while the 10-32 TPI stud connection simplifies mounting and minimizes loose connections. The 23 Vdc rating aligns with common automotive DC networks, reducing the need for adapters or conversions.
Product Information
Extended Description
CB123-15B Eaton: Eaton Bussmann series C.B.123-B automotive circuit breaker, 23 Vdc, 15A, 1.5 kAIC at 12 Vdc, Type III, Heavy duty, 10-32 TPI stud
Product Name
Eaton Bussmann series CB123-B automotive circuit breaker
Catalog Number
CB123-15B
UPC
051712601702
Product Length/Depth
0.58 in
Product Height
1.35 in
Product Width
1.8 in
Product Weight
0.54 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
15 A
Interrupt rating
1.5 kAIC at 12 Vdc
Voltage rating
23 Vdc
Connection
#10-32 TPI stud
Bussmann series 4-foot automotive planogram no.10730
CB123-15B~AUTOMOTIVE CIRCUIT BREAK
CB123-15B~AUTOMOTIVE CIRCUIT BREAK
Bussmann series Fuseology
Eaton Specification Sheet - CB123-15B
Feature: 15 A amperage rating and 23 Vdc rating provide precise overload protection for DC automotive systems. Business Impact: Quick fault clearance minimizes arcing and insulation wear, reducing the risk of fire and costly downtime. Application: Ideal for DC power distribution in vehicles, battery management, and motor control harnesses. Feature: #10-32 TPI stud connection offers secure, low-resistance terminations. Business Impact: Enhances reliability under vibration and simplifies field maintenance. Application: Compatible with standard automotive enclosures and Eaton Bussmann series harnesses. Feature: Type III heavy-duty construction delivers rugged performance. Business Impact: Supports long service life in harsh environments with consistent protection levels. Application: Suitable for heavy-duty automotive and industrial DC networks. Feature: Compact footprint and moderate weight (0.58 in depth, 1.8 in width, 1.35 in height, 0.54 lb). Business Impact: Saves space in crowded control boxes and reduces overall system weight. Application: Fits tight harnesses and compact power distribution assemblies. Feature: RoHS compliant with documentation available on request. Business Impact: Supports sustainability goals and regulatory alignment. Application: Global automotive and industrial DC installations requiring compliant protection.
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FAQs
Install CB123-15B using a #10-32 TPI stud connection, securely mounting in an enclosure with minimal vibration. Ensure correct orientation so the load side aligns with the circuit. Use appropriate torque per Eaton guidelines and verify isolation before servicing. The compact 0.58 in depth helps fit tight spaces.
The device is rated for 15 A continuous current at 23 Vdc, providing protection for DC automotive rails. It offers a 1.5 kAIC interrupt rating at 12 Vdc, enabling fast fault clearance. This combination supports peak transients while safeguarding wiring and components from short circuits.
Yes. CB123-15B is part of Eaton Bussmann's automotive circuit protection family and is referenced in Bussmann catalogs. For layout and stocking, consult the full line catalog and planograms to ensure fit with existing harnesses, connectors, and planogram slots.
CB123-15B is RoHS compliant, ensuring lead-free materials and safer disposal. For CE, SIL, IP or other regulatory certifications, contact Eaton to confirm current approvals and documentation for your target market and industry segment.
Using CB123-15B reduces downtime by reliably interrupting fault currents and protecting wiring, motors, and controllers. Its rugged Type III construction and secure terminal connection improve long-term reliability, lowering maintenance costs and warranty claims while simplifying compliance with RoHS and global automotive standards.