Bussmann CB123-30HB Eaton seri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$79.23
$33.41
Bussmann CB123-30HB Eaton series CB123-HB automotive circuit breaker, 28 Vdc, 30A, 1.5 kAIC at 12 Vdc, Automotive, type III, heavy duty, #10-32 TPI stud

Bussmann CB123-30HB Eaton series CB123-HB automotive circuit breaker, 28 Vdc, 30A, 1.5 kAIC at 12 Vdc, Automotive, type III, heavy duty, #10-32 TPI stud

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Model: CB123-30HB
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$79.23
$33.41
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Bussmann CB123-30HB Eaton series CB123-HB automotive circuit breaker, 28 Vdc, 30A, 1.5 kAIC at 12 Vdc, Automotive, type III, heavy duty, #10-32 TPI stud.

  • Amp rating: 123 A
  • Interrupt rating: 1.5 kAIC at 12 Vdc
  • Product type: Circuit Breaker
  • Dimensions (L x W x H): 0.55 x 1.7 x 2.1 in

Genuine Bussmann part number CB123-30HB.

Manufacturer Resources

Product Specs

Amperage Rating:
30 A
Compliances:
RoHS Compliant
Connection:
#10-32 TPI stud
Interrupt Rating:
1.5 kAIC at 12 Vdc
Product Height:
2.1 in
Product Length Depth:
.55 in
Product Weight:
.44 lb
Product Width:
1.7 in
Voltage Rating:
28 Vdc
Department:
Electrical
Product Type:
Circuit Breaker
Product Group:
Fuses
Product Subgroup:
Automotive Fuses

Bussmann CB123-30HB – Frequently Asked Questions

1) What amperage is the Bussmann CB123-30HB circuit breaker rated for?
The CB123-30HB is a 30 amp automotive breaker rated to 28 Vdc, with a 1.5 kAIC interrupting rating at 12 Vdc. That covers the usual 12-volt vehicle and equipment systems as well as 24-volt truck and bus systems up to the 28 Vdc ceiling. Anything above that voltage needs a different device.
2) How do the wires attach to the CB123-30HB breaker - is it a stud or a spade terminal?
Stud terminals, threaded #10-32 TPI. You land ring terminals over the studs and secure them with the nuts, so crimp your battery and load leads with #10 ring lugs rather than push-on spades. If the harness you are replacing used quick-connect blades, you will need to re-terminate.
3) What does Type III mean on a Bussmann automotive circuit breaker?
Type III is the manually resettable style. The CB123-30HB stays tripped until someone pushes the reset, unlike a Type I auto-reset breaker that cycles on its own or a Type II modified-reset that stays open while power is applied. Pick Type III when you want a fault to stay off until it is investigated, such as on winches, inverters, and accessory feeds.
4) Can I use a circuit breaker like the CB123-30HB instead of an inline fuse on a 12V accessory circuit?
Yes, and that is the usual reason to spec one. A fuse is a one-time device that has to be carried as a spare and swapped in the field; the CB123-30HB is a 30 A resettable breaker with stud terminals, so a nuisance trip is cleared by pressing the reset button instead of replacing a part. The tradeoff is size and cost per circuit, so fuses still make sense where you have many low-current loads in a block.
5) Is this breaker suitable for a 24-volt truck or bus system?
Yes. The CB123-30HB carries a 28 Vdc rating, which covers nominal 24-volt systems including charging voltage. Its 1.5 kAIC interrupt rating is specified at 12 Vdc, so on a 24-volt system size your source fault current against that published figure.
6) Is the Bussmann CB123-30HB RoHS compliant for a fleet or government purchase order?
It is RoHS compliant. For procurement paperwork the orderable part number is CB123-30HB, from the Eaton Bussmann CB123-HB heavy duty series.
How fast can I get the Bussmann CB123-30HB 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 CB123-30HB come with a warranty?
Absolutely. The Bussmann CB123-30HB 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 CB123-30HB?
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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