Bussmann CB187P-100 Eaton seri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$338.20
$337.28
Bussmann CB187P-100 Eaton series CB187P marine rated circuit breaker, 48 Vdc, 100A, 5 kAIC, Automotive, type III, marine-rated, 5/16 in-18 TPI copper terminal

Bussmann CB187P-100 Eaton series CB187P marine rated circuit breaker, 48 Vdc, 100A, 5 kAIC, Automotive, type III, marine-rated, 5/16 in-18 TPI copper terminal

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Model: CB187P-100
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$338.20
$337.28
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Bussmann CB187P-100 Eaton series CB187P marine rated circuit breaker, 48 Vdc, 100A, 5 kAIC, Automotive, type III, marine-rated, 5/16 in-18 TPI copper terminal.

  • Amp rating: 187 A
  • Interrupt rating: 5 kAIC
  • Product type: Circuit Breaker
  • Dimensions (L x W x H): 3.4 x 2.26 x 2.51 in

Genuine Bussmann part number CB187P-100.

Manufacturer Resources

Product Specs

Amperage Rating:
100 A
Compliances:
Contact factory
Connection:
5/16 inch - 18 TPI copper terminal
Interrupt Rating:
5 kAIC
Mounting Method:
Panel
Product Height:
2.51 in
Product Length Depth:
3.4 in
Product Weight:
.39 lb
Product Width:
2.26 in
Voltage Rating:
48 Vdc
Department:
Electrical
Product Type:
Circuit Breaker
Product Group:
Fuses
Product Subgroup:
Automotive Fuses

Bussmann CB187P-100 – Frequently Asked Questions

1) What amperage and voltage is the Bussmann CB187P-100 circuit breaker rated for?
The CB187P-100 is a 100 amp breaker rated 48 Vdc, with a 5 kAIC interrupting rating. That DC-only rating means it belongs on battery, inverter input, thruster, winch and house-bank feeds at 12, 24, 36 or 48 volts, not on an AC branch circuit.
2) What size lugs or cable terminals fit the Bussmann CB187P-100 breaker?
Both studs are 5/16 inch - 18 TPI copper terminals, so you need ring lugs with a 5/16 inch bolt hole and 18 TPI nuts. Copper studs are what let it carry 100 amps continuously, and crimped copper ring terminals on the cable are the right match. Size the cable for the 100 amp rating and the run length, not for the stud.
3) Can I use the Bussmann CB187P-100 on a 120V or 240V AC circuit?
No. The CB187P-100 carries a 48 Vdc rating only, so it is a DC device. For AC branch or feeder protection you need a breaker rated for that AC system voltage. Putting a DC-rated breaker on AC leaves the arc-interruption unverified for that duty.
4) Is this a fuse or a resettable circuit breaker?
It is a circuit breaker, not a fuse, so after a trip it is reset rather than replaced. That is the practical reason to choose it over a bolt-down fuse on a circuit that nuisance trips, like a winch, thruster or inverter feed where you do not want to carry spare fuses.
5) Is the Bussmann CB187P-100 approved for marine use?
It is sold as a marine rated breaker in the Eaton CB187P series and is built for DC marine and vehicle power circuits. For a specific agency listing or approval document against your survey or inspection, Bussmann directs those requests to the factory.
6) What part number do I order to get the exact same breaker again?
Order Bussmann CB187P-100. That is the genuine manufacturer part number for the 100 amp, 48 Vdc version with the 5/16 inch - 18 TPI copper studs, which matters when you are standardizing a fleet of vessels or vehicles on one breaker and one lug size.
How fast can I get the Bussmann CB187P-100 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 CB187P-100 come with a warranty?
Absolutely. The Bussmann CB187P-100 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 CB187P-100?
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
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