Eaton BK/CB181F-40 Automotive Circuit Breaker - Waterproof Type I
Part Number: BK/CB181F-40
Quick Summary
Eaton CB181F-40 automotive circuit breaker protects electrical circuits in automotive and equipment environments. This device helps prevent nuisance trips and damage from moisture, vibration, and transient faults in demanding applications. The breaker features Type I waterproof construction and flush-mount installation to suit tight panels, while RoHS compliance adds regulatory assurance for automotive and industrial integrators. By deploying a rugged, single-protection solution, maintenance teams can reduce spare parts and simplify inventory. This approach supports reliable fleet and equipment protection with improved service intervals and lower total cost of ownership.
Product Information
Extended Description
BK/CB181F-40 Eaton: Eaton Bussmann series C.B.181F automotive circuit breaker, 40A, Type I, Waterproof
Product Name
Eaton Bussmann series CB181F automotive circuit breaker
Catalog Number
BK/CB181F-40
UPC
051712634434
Product Length/Depth
3.6 in
Product Height
2 in
Product Width
3.1 in
Product Weight
0.5 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
40 A
Material
Waterproof
Packaging Type
Standard
Mounting Method
Flush
Quantity
6
Used with
SEMS nuts
Bussmann series 4-foot automotive planogram no.10730
BK/CB181F-40~BK-CB181F-40~FLUSH MOUNT CIRCUIT BREAK
BK/CB181F-40~BK-CB181F-40~FLUSH MOUNT CIRCUIT BREAK
Bussmann series Fuseology
Eaton Specification Sheet - BK/CB181F-40
Feature: 40 A amperage rating provides reliable overload protection for automotive harnesses and control circuits. Business Impact: Reduces unplanned downtime and part replacement costs in fleet maintenance. Application: Ideal for automotive electrical protection and industrial control panels where stable current limiting is essential. Feature: Waterproof construction offers enhanced ingress protection against moisture and wash-down environments. Business Impact: Extends service life in harsh field conditions, lowering repair frequency and warranty claims. Application: Suitable for off-road, marine, and outdoor equipment where exposure to water is routine. Feature: Flush mounting method enables compact panel integration with minimal enclosure intrusion. Business Impact: Frees space in crowded control hatches, enabling denser wiring and cleaner layouts. Application: Perfect for OEM enclosures and retrofit panels requiring neat, low-profile protection. Feature: RoHS compliant material and manufacturing process ensure regulatory compliance. Business Impact: Helps meet supplier sustainability targets and simplifies downstream certification. Application: Critical for automotive assemblies and compliance-driven projects. Feature: SEMS nuts compatibility and standard packaging streamline installation and inventory management. Business Impact: Reduces installation time and maintenance stocking complexity. Application: Beneficial for field technicians and OEM assembly lines seeking repeatable, fast installs. Feature: 6-pack quantity and standard packaging support scalable procurement for projects and fleets. Business Impact: Improves procurement efficiency and reduces per-unit logistics costs. Application: Suitable for large-scale deployments across multiple vehicles or machines.
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FAQs
The BK/CB181F-40 uses a flush mounting method designed for tight automotive enclosures and is specified as compatible with SEMS nuts. This combination simplifies panel installation, reduces installation time, and supports secure clamping in high-vibration environments commonly found in vehicles and heavy equipment.
Key specs include a 40 A amperage rating and a waterproof construction for Type I protection. This combination ensures reliable interruption of fault currents above 40 A while resisting moisture ingress, helping prevent electrical fires and component damage in harsh environments typical of automotive and outdoor industrial applications.
Yes. The CB181F-40 is designed as a waterproof, Type I automotive circuit breaker with flush-mount capability, making it suitable for wet, dusty, and vibration-prone environments. Its rugged build minimizes nuisance trips and extends life in fleets, construction machinery, and off-road equipment.
The unit is RoHS compliant with factory confirmation. While UL/CE listings are not explicitly stated in the provided data, RoHS compliance ensures restricted use of hazardous substances, aligning with regulatory expectations in many automotive and industrial supply chains.
Choosing this 40 A, waterproof, flush-mount breaker reduces downtime from electrical faults, lowers spare part variety, and simplifies stocking with a standard packaging format. Its rugged reliability translates to fewer service calls, faster repairs, and lower total cost of ownership across multiple vehicles or machines.