Eaton BK/CB211-25 Automotive Circuit Breaker - Type I ATM
Part Number: BK/CB211-25
Quick Summary
Eaton BK/CB211-25 automotive circuit breaker protects automotive electrical circuits by interrupting faults at 14 Vdc up to 25 A. Engineers often face nuisance trips or undersized protection that can damage wiring and sensitive modules; this device provides precise trips and robust endurance. Certification considerations vary by market; consult Eaton's datasheet for CE, IP, or SIL ratings relevant to your region and confirm system compliance. Its compact Type I ATM footprint enables effortless drop-in replacement in standard automotive fuse blocks, while reliable 150 AIC interrupt performance reduces spare parts costs. The combination of 14 Vdc, 25 A rating and accessible packaging for bulk procurement supports streamlined purchasing and consistent field performance. As part of Eaton Bussmann's automotive protection lineup, BK/CB211-25 complements fuse alternatives for harness protection and control circuits.
Product Information
Extended Description
BK/CB211-25 Eaton: Eaton Bussmann series CB211 automotive circuit breaker, Packaging quantity 100, 14 Vdc, 25 A, 150 AIC, Type I ATM footprint
Product Name
Eaton Bussmann series CB211 automotive circuit breaker
Catalog Number
BK/CB211-25
UPC
051712846776
Product Length/Depth
0.49 in
Product Height
0.25 in
Product Width
1.42 in
Product Weight
0.1 lb
Compliances
Contact factory
Amperage Rating
25 A
Interrupt rating
150 AIC
Voltage rating
14 Vdc
Quantity
6
Special features
Packaging quantity 100
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Eaton Specification Sheet - BK/CB211-25
Feature: 14 Vdc voltage rating provides appropriate protection for standard automotive electrical systems. Business Impact: Enables safe operation of 12–14 V battery networks without over- or under-protection, reducing battery discharge risk and wiring damage. Application: Vehicle harnesses, auxiliary circuits, and sensor power lines. Feature: 25 A amperage rating supports mid-range load protection while avoiding nuisance trips on normal startup surges. Business Impact: Improves uptime and reduces unnecessary maintenance, lowering total cost of ownership. Application: ECU power feeds and accessory circuits in cars, trucks, and off-road equipment. Feature: 150 AIC interrupt rating ensures rapid clearing of high‑fault currents, protecting conductors from thermal damage. Business Impact: Enhances system safety margins and compliance with automotive fault-current requirements. Application: Main power feeds and critical control lines subject to short-circuit faults. Feature: Type I ATM footprint enables drop-in compatibility with common automotive fuse blocks. Business Impact: Simplifies replacement, reduces installation time, and minimizes rework costs. Application: Standardized automotive protection assemblies in aftermarket and OEM wiring looms. Feature: Packaging quantity of 100 aids procurement efficiency and spares management. Business Impact: Lowers per-unit handling costs and guarantees ready coverage for technicians and service fleets. Application: Inventory planning for service shops and fleet maintenance. Feature: Compact physical dimensions (0.49 in L × 0.25 in H × 1.42 in W) and light 0.1 lb weight support space-constrained installations. Business Impact: Facilitates packaging within tight enclosures, improving harness routing and reducing enclosure size. Application: Dense automotive electrical panels and compact fused circuits. Industry context: The CB211-25 sits in Eaton Bussmann’s automotive protection family, providing reliable, field-proven protection across light- and medium-duty vehicles, with compatibility considerations for standard automotive electrical systems and harness configurations.
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FAQs
BK/CB211-25 uses the Type I ATM footprint, a common automotive block standard. It measures 0.49 in long, 0.25 in tall, and 1.42 in wide, allowing straightforward drop-in replacement in compatible fuse boxes. Use the provided 6‑count packaging for bulk replacements and verify connector pin spacing matches your block for reliable seating and secure wiring.
The device is rated for 14 Vdc operation, with a 25 A continuous amperage rating and a 150 AIC interrupt rating. This combination supports typical automotive loads while providing fast fault clearance to protect wiring harnesses and sensitive electronics during short circuits or overload conditions.
Yes. The 25 A rating aligns with mid-range ECU and accessory power feeds, offering reliable protection without frequent nuisance trips. Engineered for automotive environments, it helps safeguard critical modules and reduces the risk of cascading failures in harnesses, sensors, and control lines.
Certification details can vary by market. The spec sheet notes Compliances as contact factory, so verify CE, IP, or SIL ratings with Eaton for your region and application. This ensures your installation meets local regulatory requirements and automotive safety standards before deployment.
Using a circuit breaker like BK/CB211-25 reduces nuisance trips and component damage, lowering warranty claims and maintenance downtime. The packaging quantity of 100 supports efficient stocking, faster replacements, and better uptime for fleets, service shops, and OEM assemblies, delivering smoother operations and long-term cost savings.