Eaton BK/CB185-100 Automotive Circuit Breaker - 3 kAIC
Part Number: BK/CB185-100
Quick Summary
The Eaton BK/CB185-100 automotive circuit breaker provides reliable overcurrent protection for 48 Vdc vehicle electrical systems. Engineers often struggle to find devices that fit tight spaces while delivering consistent trips under vibration and wet conditions. RoHS-compliant construction and waterproof housing support longevity in harsh environments, and the Type III, switchable design enables quick reset or replacement in the field. With a 100 A rating and a 3 kAIC interrupt capacity, this unit protects power distribution without nuisance trips, reducing downtime and component damage. Its flush-mount form, standard packaging, and SEMS-nut compatibility simplify installation and stock planning for vehicle fleets, OEMs, and service teams.
Product Information
Extended Description
BK/CB185-100 Eaton: Eaton Bussmann series C.B.185 automotive circuit breaker, 48 Vdc, 100A, 3 kAIC, Type III, Switchable, Waterproof
Product Name
Eaton Bussmann series CB185 automotive circuit breaker
Catalog Number
BK/CB185-100
UPC
051712621571
Product Length/Depth
1.9 in
Product Height
2.9 in
Product Width
1.68 in
Product Weight
0.23 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
100 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Material
Waterproof
Packaging Type
Standard
Mounting Method
Flush
Quantity
6
Used with
SEMS nuts
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Eaton Specification Sheet - BK/CB185-100
Feature 100 A protection with a 3 kAIC interrupt rating delivers fast fault clearance in automotive power circuits, reducing conductor overheating and downstream failures in harsh environments. This translates to lower maintenance costs and less downtime in fleets and industrial equipment. Business Impact improved reliability and uptime translate to lower total cost of ownership for OEMs and fleet operators. Application suitable for DC distribution in automotive environmental conditions, including off-road and marine uses. Feature 48 Vdc voltage rating ensures compatibility with typical automotive and DC distribution systems, preventing nuisance trips from undersized protective devices. Benefit reduces operational risk and avoids unnecessary system rework in critical power rails. Application ideal for vehicle battery networks, lighting, and control circuits where stable protection is essential. Feature Waterproof housing and RoHS compliance support reliability in wet or vibration-prone environments. Benefit prolongs component life and simplifies regulatory compliance, minimizing service interventions. Application well-suited for engine bays, exposed electrical enclosures, and outdoor equipment. Feature Type III switchable design enables quick re-arm or replacement after a trip. Benefit reduces repair time and accelerates maintenance routines. Application aligns with serviceable power distribution blocks and field-repair workflows in automotive and industrial settings. Feature Flush mounting with standard packaging and SEMS-nut compatibility simplifies installation and stocking. Benefit shortens assembly time and reduces hardware needs for panel builders. Application ideal for compact control panels and spaces with limited mounting depth. Feature Packaging quantity of six per package improves procurement efficiency for fleets and OEMs. Benefit lowers per-unit logistics and inventory management costs. Application supports multi-unit deployments across vehicles and regional service fleets.
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FAQs
The BK/CB185-100 uses flush mounting and is designed for compatibility with SEMS nuts, enabling quick, secure installation in tight panels. This combination reduces assembly time, minimizes hardware requirements, and simplifies servicing in fleet and OEM applications.
This breaker is rated for 100 A with a 3 kAIC interrupt capacity and operates at 48 Vdc. These ratings provide robust protection for DC distribution in automotive environments, ensuring rapid fault clearing while tolerating typical automotive transients.
Yes. The unit features a waterproof housing and RoHS compliance, supporting reliable performance in engine bays, exposed enclosures, and off-road or marine applications where moisture and vibration are common.
Absolutely. The BK/CB185-100 is packaged in standard quantity with six per package, which simplifies stocking, reduces procurement complexity, and speeds deployment across multiple vehicles or equipment fleets.
Because it is Type III and switchable, the breaker can be quickly reset or replaced after a trip. For maintenance, ensure the enclosure remains dry, verify RoHS compliance, and replace with a like-for-like unit to maintain electrical protection integrity.