Eaton CBC-20HB Automotive Circuit Breaker - 1.5 kAIC
Part Number: CBC-20HB
Quick Summary
CBC-20HB automotive circuit breaker is designed to protect vehicle electrical circuits from faults in demanding automotive environments. Engineers often wrestle with mounting fit and consistent interruption performance in vibration-prone layouts; CBC-20HB addresses these pains with rugged #10-32 TPI stud connections and a proven Type I design. Compliance details vary by region and application, so always verify current approvals with Eaton, as some specs are listed as 'Contact factory.' With a 14 Vdc rating and a 20 A interrupt capacity, this device supports reliable protection in modern DC automotive networks, helping reduce downtime and warranty costs while aligning with Bussmann-series protection strategies.
Product Information
Extended Description
CBC-20HB Eaton: Eaton Bussmann series CBC-HB automotive circuit breaker, 14 Vdc, 20 A, 1.5 kAIC, Type I, 10-32 TPI stud
Product Name
Eaton Bussmann series CBC-HB automotive circuit breaker
Catalog Number
CBC-20HB
UPC
051712595445
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
20 A
Interrupt rating
1.5 kAIC
Voltage rating
14 Vdc
Connection
#10-32 TPI stud
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Eaton Specification Sheet - CBC-20HB
Feature → Business Impact → Application: 14 Vdc rating combined with a 20 A current capacity ensures fast, predictable interruption of faulted circuits in vehicle electrical systems, reducing the risk of collateral damage and downtime. This translates to improved reliability for battery feeds, alternator circuits, and accessory distributions, supporting OEM performance targets while meeting rugged automotive operating conditions. Feature → Business Impact → Application: The CBC-20HB uses a #10-32 TPI stud connection and a compact 13.31 in length with 9.63 in height, enabling straightforward integration into tight engine compartments and retrofit installations. Benefit: simplified installation under vibration, reduced labor time, and compatibility with Eaton Bussmann-series protection components for scalable vehicle protection. Feature → Business Impact → Application: Type I trip behavior and automotive-grade construction improve durability against temperature swings and mechanical shocks, delivering consistent protection across a wide operating envelope, which lowers service calls and warranty costs. Feature → Business Impact → Application: Compliance data is managed through Eaton’s certification program; verify regional requirements with the factory to ensure alignment with CE/UL expectations where applicable, supporting regulatory compliance and customer acceptance in targeted markets.
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FAQs
CBC-20HB uses a #10-32 TPI stud connection designed for secure, vibration-resistant mounting in tight automotive harnesses. Ensure adequate clearance around the unit for service access and cooling, verify stud engagement with the mounting hardware, and follow Eaton’s installation guidelines. The unit length (13.31 in) and overall footprint should be accounted for when planning space in engine compartments or protected enclosures. Use appropriate hardware to avoid back-off under operational vibration, and confirm wiring polarity and protection zone placement to maintain system integrity.
The CBC-20HB is rated for 14 Vdc, 20 A, with an interrupt rating of 1.5 kAIC. This combination supports rapid interruption of fault currents in DC automotive circuits, minimizing damage to wires and components. The 20 A rating suits battery feeds and distribution points typical in 12–14 V systems, while the 1.5 kAIC capacity provides a robust margin for transient faults common in automotive environments.
Yes. The CBC-20HB is designed for automotive use with a Type I trip characteristic and rugged construction tailored for vehicle environments. The #10-32 stud connection and compact footprint aid secure mounting in challenging spaces, reducing movement-related wear. This makes it well-suited for engines, chassis electronics, and auxiliary power circuits where vibration and temperature fluctuations are routine, helping maintain consistent protection without frequent maintenance.
Compliance details for CBC-20HB are not publicly listed in the data provided; Eaton specifies 'Contact factory' for compliances. For regional CE/UL or industry-specific approvals, contact Eaton to obtain the latest certificates and verification documents. Verifying current approvals is essential to meet local regulatory requirements and customer project specifications before deployment.
The CBC-20HB provides durable, no-fuse protection with a fixed 20 A rating, reducing fuse-related nuisance faults and associated service calls. Its DC automotive design minimizes downtime in battery and distribution circuits, while the rugged mounting reduces mounting-related failures. Over the lifecycle, this protection can lower warranty costs and improve system availability, particularly in fleets or OEM programs with extended operation in harsh conditions.