Eaton CBT-20N Automotive Circuit Breaker - Type II RoHS

Part Number: CBT-20N
Manufacturer
Eaton
Part number
CBT-20N

Quick Summary

CBT-20N automotive circuit breaker from Eaton provides fast, reliable protection for automotive electrical circuits. Engineers often struggle with nuisance trips and space constraints in crowded harnesses; this compact device offers precise 2 A protection without sacrificing performance. It is RoHS compliant and designed for automotive use; for CE, IP ratings, or SIL certifications, please contact the factory for confirmation. In addition to reliability, the CBT-20N streamlines procurement and installation, supported by Eaton’s specification sheets and robust engineering documentation. This combination helps OEMs reduce lead times and maintain consistent electrical protection across vehicle platforms.

Product Information

Extended Description

CBT-20N Eaton: Eaton Bussmann series C.B.T-N automotive circuit breaker, 2A, Type II
Product Name
Eaton Bussmann series CBT-N automotive circuit breaker
Catalog Number
CBT-20N
UPC
051712601047
Product Length/Depth
1.3 in
Product Height
0.15 in
Product Width
0.52 in
Product Weight
0.2 lb
Compliances
RoHS Compliant Contact factory
Amperage Rating
2 A
Feature: The CBT-20N delivers a precise 2 A amperage rating, engineered to protect small automotive circuits from overcurrent events without unnecessary trips. Business impact: This targeted protection reduces nuisance trips and minimizes wear on sensitive controllers, lowering maintenance costs. Application: Ideal for sensor lines, signaling circuits, and microcontroller-powered modules within dashboard and body electronics. Feature: Type II electrical protection class provides robust interruption capability while remaining compatible with automotive harnesses in demanding environments. Business impact: It minimizes risk of cascading faults in power distribution networks and supports safer maintenance windows. Application: Use in wired environments with limited clearance, inside compact fuse blocks or modular protection panels. Feature: Very compact footprint measures 1.3 inches long, 0.52 inches wide, and 0.15 inches high, with a per-unit weight of 0.2 pounds. Business impact: The small form factor reduces enclosure size and total system weight, enabling slimmer vehicle architectures and easier routing. Application: Suitable for tight automotive compartments, under-dash modules, and integrated power rails where space is at a premium. Feature: RoHS compliant construction aligns with modern regulatory expectations for material content and end-of-life recyclability. Business impact: This ensures smoother global approvals, fewer compliance bottlenecks, and lower regulatory risk for OEMs. Application: Critical for vehicles sold in multiple regions and in programs emphasizing sustainability. Feature: Clear part identification with UPC 051712601047 and access to Eaton specification sheets supports procurement and maintenance. Business impact: Improves stocking accuracy, reduces part misidentification, and speeds repair cycles. Application: Useful for supply chain teams, fleet maintenance, and field service operations across automotive programs.

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FAQs

CBT-20N is designed for integration in standard automotive harnesses and panel blocks. Its 1.3 in L x 0.52 in W x 0.15 in H footprint fits tightly into compact enclosures and fuse blocks used across OEMs. The part uses a standard form factor compatible with Eaton Bussmann protection solutions, and the UPC simplifies stocking and reordering.
The CBT-20N uses a 2 A rating to clamp currents just above normal operating levels, preventing thermal damage without nuisance trips during typical load transients in automotive circuits. This balance reduces cycling wear on relays and controllers, while ensuring critical modules stay powered during startup surges. This is well-suited for sensors, microcontrollers, and small actuators.
Yes, the CBT-20N is RoHS compliant, aligning with modern material restrictions for electronics. For other certifications such as CE, IP, or SIL status, please contact Eaton for confirmation and applicable documentation. Certification availability varies by batch and region, so procure with current datasheets to ensure compliance for your vehicle program.
CBT-20N protects low-current automotive circuits such as dashboard sensors, signaling lines, and control modules where space is limited. Its Type II design provides robust protection in harnesses and small panels, while the compact form factor simplifies integration with OEM power distribution strategies and modular protection blocks.
CBT-20N requires no routine field maintenance beyond periodic inspection for mechanical wear or overheating indicators. Replace after a trip event or if the device shows signs of sticking or cracking in the housing. Always reference Eaton’s specification sheet for installation torque, mounting, and compatibility guidelines, and ensure replacement parts match the 2 A, Type II rating for reliable operation.