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Manufacturer Resources
Spec Sheet
Product Specs
- Amperage Rating:
- 55A
- Certifications:
- UL Listed
- Circuit Breaker Type:
- QC
- Connection:
- Cable-in/cable-out
- Interrupt Rating:
- 10 kAIC
- Number Of Poles:
- Single-pole
- Product Height:
- 5 IN
- Product Length Depth:
- 3.8 IN
- Product Weight:
- 3 LB
- Product Width:
- .5 IN
- Trip Type:
- Thermal-magnetic
- Voltage Rating:
- 120/240V
- Department:
- Electrical
- Product Group:
- Electrical Components
- Product Subgroup:
- Circuit Breakers
- Product Type:
- Industrial miniature circuit breaker
- Product Details:
- Industrial miniature circuit breaker
B-LINE QC1055 – Frequently Asked Questions
1) Is the QC1055 breaker a single-pole or two-pole, and what amperage?
The Eaton QC1055 is a single-pole thermal-magnetic breaker rated 55 amps at 120/240V. Single-pole means it lands on one bus stab and protects one hot conductor, so if you are feeding a 240V two-wire load you need a two-pole device instead, not this one.
2) Does the QC1055 breaker terminate with lugs or does it plug onto a bus?
Cable-in/cable-out. The QC1055 accepts a conductor on the line side and a conductor on the load side rather than stabbing onto a panel bus, which is how these industrial miniature breakers get used as standalone or enclosed branch protection. Plan your wireway and conductor routing accordingly.
3) What part number do I order to replace an existing Eaton QC series 55 amp breaker?
QC1055 is the manufacturer part number. It is an Eaton QC type breaker, so it matches an existing QC series 55A single-pole installation. If the breaker coming out is a different type designation stamped on its face, QC1055 is not a drop-in and you should match the type letter exactly before ordering.
4) Is the Eaton QC1055 UL Listed for commercial and institutional work?
The QC1055 is UL Listed. For a facility maintenance or government specification that calls out listed overcurrent devices, that listing plus the 10 kAIC interrupting rating and the 120/240V rating are the three values an inspector or reviewer will look for.
5) What does a thermal-magnetic trip on the QC1055 actually protect against?
Two things in one device. The thermal element responds to sustained overload, an inverse-time trip that lets a motor or inrush load pass briefly without nuisance tripping. The magnetic element responds instantly to a short circuit. That combination is why the QC1055 suits general branch and feeder protection rather than a purely instantaneous application.
How fast can I get the B-LINE QC1055 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 B-LINE QC1055 come with a warranty?
Absolutely. The B-LINE QC1055 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 B-LINE QC1055?
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 B-LINE QC1055 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.