Eaton CBC-40HB Automotive Circuit Breaker - 1.5 kAIC
Part Number: CBC-40HB
Quick Summary
Eaton CBC-40HB automotive circuit breaker protects automotive electrical systems by interrupting faults. Engineers often confront nuisance trips or under-protection in rugged vehicle environments, risking downtime and equipment damage. Note that compliances are listed as 'Contact factory' for this part, and regional versions may carry CE, IP, or SIL qualifications upon request. For OEMs and service teams, the 14 Vdc rating and 1.5 kAIC interrupt capability support reliable protection while enabling cleaner harness designs and simpler installation in automotive applications.
Product Information
Extended Description
CBC-40HB Eaton: Eaton Bussmann series CBC-HB automotive circuit breaker, 14 Vdc, 40 A, 1.5 kAIC, Type I, 10-32 TPI stud
Product Name
Eaton Bussmann series CBC-HB automotive circuit breaker
Catalog Number
CBC-40HB
UPC
051712593304
EAN
5027590151061
Product Length/Depth
13.31 in
Product Height
9.63 in
Product Width
1.94 in
Product Weight
0.34 lb
Compliances
Contact factory
Amperage Rating
40 A
Interrupt rating
1.5 kAIC
Voltage rating
14 Vdc
Connection
#10-32 TPI stud
Bussmann series 4-foot automotive planogram no.10730
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Bussmann series full line retail catalog no. 5084
Bussmann series full line retail catalog no. 5084
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Eaton Specification Sheet - CBC-40HB
The CBC-40HB delivers a robust 14 Vdc rating, enabling dependable protection for modern vehicle electrical systems while minimizing nuisance trips in harsh environments. Feature → Business Impact → Application: The 40 A current rating protects circuits from overloads with precise action, reducing the risk of component damage and downtime, enabling more predictable maintenance windows in fleet operations and vehicle assemblies. The 1.5 kAIC interrupt rating provides strong short-circuit containment, lowering the likelihood of collateral damage to wiring and downstream devices across heavy-duty applications. The Type I trip characteristic supports timely disconnection for automotive fault conditions, improving system reliability in engine bays and under-hood electronics. Connection via #10-32 TPI studs simplifies integration with common automotive harnesses and panel mounts, while the compact 13.31 in length, 9.63 in height, and 1.94 in width enable adaptable mounting in constrained enclosures. Weight at 0.34 lb keeps added mass and vibration impact low. Comprehensive documentation (datasheets and planograms) supports fast qualification and installation, reducing design cycles and accelerating time-to-prototype. Compatibility with Eaton Bussmann series components helps standardize parts across a vehicle program, delivering procurement savings and streamlined spares management. When regulatory compliance is needed, consult the factory for regional certification options such as CE, IP, or SIL as part of a customized solution.
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FAQs
Installers should align the CBC-40HB to the chassis or enclosure mounting point, then secure the #10-32 threaded stud connection to the corresponding harness terminal. Use proper torque and anti-vibration hardware per vehicle standards, ensuring a clean, snug connection to minimize resistance and prevent heat buildup. Verify orientation and clearance to avoid pinching wires during service or vibration events.
1.5 kAIC indicates the breaker can interrupt a short-circuit current up to 1.5 kiloamperes without damage, isolating the fault and protecting upstream wiring and components. This rating is particularly important for automotive circuits with high inrush or transient fault conditions, helping prevent cascading failures and reducing repair costs after faults.
The CBC-40HB is specified for 14 Vdc systems, aligning with many automotive and mobile electrical architectures. While it can be used in some 12 V contexts, confirm vendor guidance and regional applicability with Eaton to avoid misapplication and ensure regulatory compliance.
Current data lists compliances as Contact factory, with regional versions potentially offering CE, IP, or SIL qualifications upon request. For your installation, confirm the specific certification package with Eaton to ensure the part meets your regulatory and safety requirements.
CBC-40HB fits within the Eaton Bussmann automotive protection lineup, enabling standardized parts across vehicle programs. This standardization can reduce SKU proliferation, simplify procurement, and improve spare parts availability, delivering lower total cost of ownership while maintaining reliable protection for critical circuits and reducing downtime.