Bussmann CBT Series Automotive...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$31.59
Bussmann CBT Series Automotive Type II Circuit Breaker, Resettable

Bussmann CBT Series Automotive Type II Circuit Breaker, Resettable

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Model: CBT-15N

In Stock (leaves warehouse same day if ordered before 3pm ET)

$31.59
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Bussmann CBT Series Automotive Type II Circuit Breaker, Resettable

The Bussmann CBT Series is a family of automotive Type II circuit breakers engineered for resettable overcurrent protection in mobile and marine electrical systems, available in ratings from 15A to 30A. Built for use in boats, buses, RVs and trucks, these rugged circuit breakers give installers a reusable alternative to single-use fuses on demanding on-board circuits. Their compact automotive-grade construction supports dependable overcurrent protection across marine, transit and mobile vehicle applications, and each breaker can be reset after tripping rather than replaced with a new part.

Key Features

  • Amperage Rating: Available in 15A, 25A and 30A ratings to match a range of 30-amp-class mobile electrical circuit demands.
  • Automotive Type II Design: Automotive, type II construction provides resettable circuit protection suited to mobile and marine electrical systems.
  • Broad Mobile Application: Engineered for use in boats, buses, RVs and trucks, covering a wide range of mobile and marine electrical installations.
  • Compact Footprint: Measures 1.3 IN in length, .52 IN in width and .15 IN in height for space-efficient mounting in tight electrical panels and junction boxes.
  • Lightweight Build: Weighs just .2 LB, keeping added mass minimal in weight-sensitive mobile and marine installations.
  • Resettable Protection: Type II automotive circuit breaker construction allows the breaker to be reset after tripping, reducing the need for replacement parts and simplifying field maintenance.

Technical Specifications

  • Product Type: Automotive, type II
  • Application: Boats, buses, RVs and trucks
  • Amp Rating Options: 15A, 25A, 30A
  • Product Length: 1.3 IN
  • Product Width: .52 IN
  • Product Height: .15 IN
  • Product Weight: .2 LB

Typical Applications

  • Marine Electrical Systems (Boats)
  • Bus Electrical Circuits
  • RV and Motorhome Wiring
  • Truck and Heavy-Duty Vehicle Circuits
  • Mobile and Automotive Overcurrent Protection
  • Panel and Junction Box Circuit Protection in Mobile Installations

Why Bussmann?

Bussmann circuit breakers are engineered for dependable, resettable overcurrent protection in demanding automotive and mobile electrical environments. The CBT Series' automotive Type II construction, available in 15A, 25A and 30A ratings, makes it a practical choice for boats, buses, RVs and trucks that need rugged, reusable circuit protection instead of one-time-use fuses. Its compact 1.3 IN by .52 IN by .15 IN footprint and .2 LB weight make it easy to integrate into space-constrained mobile electrical panels, giving installers consistent, reliable performance across mobile and marine electrical systems and dependable, code-conscious protection for professional electrical work.

Manufacturer Resources

Product Specs

Product Width:
.52 IN
Product Length:
1.3 IN
Product Details:
Automotive, type II
Product Type:
Circuit Breaker
Product Subgroup:
Automotive Fuses
Product Group:
Fuses
Product Height:
.15 IN
Department:
Electrical
Product Weight:
.2 LB
Application:
Boats, buses, RVs and trucks
Series:
CBT
Amperage Rating:
15A-30A

Bussmann CBT-15N – Frequently Asked Questions

1) What amp ratings does the Bussmann CBT Series automotive circuit breaker come in?
Three ratings are offered in the CBT Series: 15A (CBT-15N), 25A (CBT-25N) and 30A (CBT-30N). Pick the rating to match the wire and load on the circuit you are protecting, not the largest one available.
2) Does a Type II circuit breaker reset itself, or do I have to reset it by hand?
Type II is the modified-reset style: the CBT breaker stays tripped until the circuit is de-energized or reset, rather than cycling on and off on its own like a Type I auto-reset. That is what you want on a circuit where you need to know something faulted and go find it, instead of having a load chatter in and out.
3) Can I use a CBT breaker instead of a blade fuse on a boat or truck circuit?
That is the point of it. The CBT is a resettable automotive breaker meant as a reusable alternative to a one-time fuse on boat, bus, RV and truck circuits. On a circuit that nuisance-trips or sits somewhere awkward to reach with a spare fuse, the breaker saves you carrying stock and pulling panels. Match the breaker amp rating to the fuse rating the circuit was designed around.
4) I need a 40A or 50A circuit breaker for a truck accessory circuit. Does the CBT go that high?
No. The CBT tops out at 30A, so it covers 30-amp-class circuits and below. For anything above that you need a larger-frame automotive breaker; do not put a 30A CBT on a 40A or 50A load, it will trip under normal current.
5) Will the Bussmann CBT breaker fit in a tight RV or marine panel?
It is a small flat breaker, 1.3 inches long by .52 inches wide by .15 inches high, weighing .2 lb, so it goes into crowded panels and junction boxes where a larger housed breaker will not. Measure the stud or terminal spacing in your panel against that 1.3 inch length before you commit.
6) Which Bussmann CBT part number do I order for a 25 amp circuit?
CBT-25N is the 25 amp version. The family follows the same pattern across the range: CBT-15N for 15A and CBT-30N for 30A. The amp rating is the only thing that changes between them.
7) Can I standardize on one CBT breaker across a fleet of buses and RVs?
Yes, within the 15A to 30A window. The CBT Series is one physical format (1.3 by .52 by .15 inches) across all three ratings, so a fleet or marina shop can stock 15A, 25A and 30A units that mount the same way and swap by rating alone. Circuits above 30A will need a different breaker family.
How fast can I get the Bussmann CBT-15N delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann CBT-15N come with a warranty?
Absolutely. The Bussmann CBT-15N is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann CBT-15N?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Bussmann CBT-15N from ZenSupply?
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