Eaton CB185P-25 Automotive Circuit Breaker - 3 kAIC
Part Number: CB185P-25
Quick Summary
The Eaton CB185P-25 automotive circuit breaker protects 48 Vdc vehicle circuits from overloads and short circuits. Engineers often face reliability challenges in compact, vibration-prone panels where space is limited and downtime is costly. RoHS compliant and designed for panel-mount installation, this CB185P-25 helps maintain electrical integrity in mobile equipment. While manufacturers push higher amperage, the 25 A rating paired with a 3 kAIC interrupt capacity provides fast protection without nuisance trips. This solution also aligns with Bussmann series standards for automotive protection, offering predictable performance in harsh environments. For procurement teams, the compact form factor and straightforward replacement reduce maintenance costs while ensuring compliant, safe operation.
Product Information
Extended Description
CB185P-25 Eaton: Eaton Bussmann series C.B.185P automotive circuit breaker, Switchable, 48 Vdc, 25A, 3 kAIC, Type III, High amp
Product Name
Eaton Bussmann series CB185P automotive circuit breaker
Catalog Number
CB185P-25
UPC
051712614771
Product Length/Depth
1.9 in
Product Height
2.9 in
Product Width
2.1 in
Product Weight
0.18 lb
Compliances
Contact factory RoHS Compliant
Amperage Rating
25 A
Interrupt rating
3 kAIC
Voltage rating
48 Vdc
Mounting Method
Panel
Special features
Switchable
Bussmann series 4-foot automotive planogram no.10730
CB185P-25~TYPE 3 HI AM PANEL MOUNT CB - 25 AMP
CB185P-25~TYPE 3 HI AM PANEL MOUNT CB - 25 AMP
Bussmann series Fuseology
Eaton Specification Sheet - CB185P-25
Feature 25 A current rating with a 3 kAIC interrupt capacity. Business impact Delivers dependable protection against short circuits in 48 Vdc vehicle circuits, reducing wiring damage and arc energy, which translates to higher uptime and lower repair costs. Application Ideal for automotive harnesses and mobile equipment where quick disconnection of fault currents is critical. Feature Switchable operation for easy reset and control. Business impact Simplifies maintenance and diagnostics by allowing intentional reset from the panel, limiting downtime during fault events. Application Useful in panel-mounted control boxes and compact automotive enclosures where space is at a premium. Feature Panel mounting method. Business impact Enables secure, vibration-tolerant installation with a sturdy, fixed position that resists shock and bounce. Application Suited for dashboard, engine bay, and mobile equipment panels where reliable mounting is essential. Feature RoHS compliance. Business impact Supports regulatory compliance and sustainability goals while reducing hazardous substance exposure in assembly and end-of-life disposal. Application Fits in modern, eco-conscious vehicle production lines. Feature Compact dimensions (1.9 in L Ă— 2.1 in W Ă— 2.9 in H) and light weight (0.18 lb). Business impact Frees panel space and simplifies integration in tight electrical rooms, cutting installation time and material costs. Application Beneficial for space-constrained railway, marine, and fleet applications. Feature 48 Vdc voltage rating. Business impact Aligns with common automotive and industrial vehicle power architectures, ensuring compatible protection without over-design. Application Works with 48 V power rails in electric and hybrid vehicles, as well as mobile machinery.
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FAQs
CB185P-25 is designed for panel mounting in 48 Vdc vehicle electrical enclosures. Ensure the breaker sits in its panel slot with the terminals accessible for wiring. Connect the input to the positive power rail and the load to the output side, then secure the module to minimize vibration paths. Verify that the installation location provides adequate cooling and proximity to routed conductors to prevent heat buildup.
The CB185P-25 provides a 25 A amperage rating, a 3 kAIC interrupt capacity, and a 48 Vdc voltage rating. These ratings determine the maximum current it can safely carry, its ability to interrupt fault currents without destructive arcing, and its compatibility with typical 48 V automotive circuits. Designers should select this part to protect sensitive loads while accommodating startup surges common in mobile equipment.
Yes, CB185P-25 is well-suited for automotive and mobile equipment where vibration is common. Use the panel mounting method to secure the unit firmly, minimize loose wiring, and ensure proper strain relief on all terminations. Keeping the breaker away from direct engine heat and securing adjacent components reduces wear and improves long-term reliability in harsh operating conditions.
The data indicates RoHS compliance for CB185P-25. There are no listed CE, UL, or IP certifications in the provided specification. For projects requiring additional certifications, consult Eaton or the authorized distributor to confirm current ratings and any tests or approvals applicable to your region and industry.
Adopting CB185P-25 can lower maintenance costs by reducing nuisance trips and protecting critical loads in 48 Vdc systems, which minimizes wiring and relay damage. The switchable feature simplifies fault diagnosis and reset after trips, shortening downtime. Its compact size supports higher wiring density, potentially reducing panel space and overall enclosure costs.