Eaton CBC-40 Automotive Circuit Breaker - 1.5 kAIC
Part Number: CBC-40
Quick Summary
CBC-40 automotive circuit breaker is a rugged DC protection device designed for automotive electrical systems. Engineers rely on dependable protection for high-current DC buses without nuisance trips or bulky hardware. Compliance expectations in automotive power electronics vary by region and model, so verify with the factory for the CBC-40’s status on standards such as CE, UL, or IP ratings. This solution delivers a 14 Vdc rating, 40 A current capacity, and a 1.5 kAIC interrupt rating, supporting safe operation in demanding vehicle environments while fitting in compact layouts. In business terms, selecting the CBC-40 translates into fewer field failures and reduced warranty costs.
Product Information
Extended Description
CBC-40 Eaton: Eaton Bussmann series CBC automotive circuit breaker, 14 Vdc, 40 A, 1.5 kAIC, Type I, 10-32 TPI stud
Product Name
Eaton Bussmann series CBC automotive circuit breaker
Catalog Number
CBC-40
UPC
051712271035
Product Length/Depth
14.75 in
Product Height
7.5 in
Product Width
9.25 in
Product Weight
0.5 lb
Compliances
Contact factory
Amperage Rating
40 A
Interrupt rating
1.5 kAIC
Voltage rating
14 Vdc
Connection
#10-32 TPI stud
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Eaton Specification Sheet - CBC-40
14 Vdc operating rating ensures compatibility with common automotive electrical architectures, reducing the risk of mis-match in 12- to 14-volt systems. This translates to more reliable power delivery for essential loads such as lighting, actuators, and control modules in commercial and passenger vehicles. 40 A current capacity protects medium‑demand circuits while allowing for efficient circuit design and reduced wire gauge. A 1.5 kAIC interrupt rating delivers robust short‑circuit protection, limiting damage and accelerating fault isolation in harnesses and power distribution networks. Type I trip classification offers predictable response characteristics, improving diagnostic clarity during faults and minimizing unnecessary trips in transient conditions. The #10-32 TPI stud connection simplifies mounting and terminal integrity, supporting quick field installation and consistent electrical contact. Overall, the CBC-40 supports compact layouts and straightforward service, aligning with cost‑per‑amp goals in vehicle programs.
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FAQs
CBC-40 uses a #10-32 TPI stud connection, so plan for secure stud mounting in a compatible terminal block or panel. Ensure proper torque on the studs and provide adequate clearance for heat and vibration. Verify compatibility with standard automotive mounting practices to maintain serviceability and reliable contact integrity.
The CBC-40 operates at 14 Vdc, provides a 40 A amperage rating, and has a 1.5 kAIC interrupt rating. It is classified as Type I and uses a #10-32 TPI stud for connections, making it suitable for DC automotive protection applications and straightforward installation with common components.
Yes, the CBC-40 is designed for automotive use and is accompanied by rugged dimensions and a robust connection scheme. While specific certifications should be confirmed with Eaton, the design supports reliable operation under typical vehicle vibration and thermal cycling found in engine compartments and chassis routes.
Compliances for CBC-40 are listed as Contact factory, so certification status may vary by market. For exact approvals (such as CE, UL, or IP ratings) and current compliance documentation, request the latest Eaton specification sheet or contact Eaton’s technical support to confirm the product’s certification portfolio for your region.
By delivering precise DC protection with a clear fault‑isolation path, the CBC-40 reduces wiring damage and catastrophic failure risks, lowers warranty costs, and minimizes downtime in service and maintenance. Its compact footprint and straightforward installation help shorten build times and improve overall system reliability in automotive power distribution.