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Manufacturer Resources
Product Specs
- Amperage Rating:
- 45A
- Circuit Breaker Type:
- QC
- Connection:
- Cable-in/Cable-out
- Interrupt Rating:
- 10 kAIC
- Number Of Poles:
- Single-pole
- Trip Type:
- Non-Interchangeable
- Voltage Rating:
- 120/240V
- Department:
- Electrical
- Product Type:
- Quicklag
- Product Length:
- 12 IN
- Product Details:
- Quicklag
- Product Height:
- 5 IN
- Product Weight:
- .4 LB
- Product Width:
- 7.5 IN
B-LINE QC1045 – Frequently Asked Questions
1) Is the B-Line QC1045 Quicklag breaker a single-pole 45 amp breaker, and what voltage can it be used on?
The QC1045 is a single-pole, 45 amp Quicklag thermal-magnetic breaker rated 120/240V. Single-pole means it lands on one bus phase and protects one hot conductor, so on a 120/240V single-phase panel it gives you a 120V branch circuit. For a 240V two-wire load you need a two-pole device instead.
2) Can the trip unit on the B-Line QC1045 be changed or adjusted in the field?
No. The QC1045 uses a non-interchangeable trip, so the 45 amp thermal-magnetic trip is fixed at the factory and cannot be swapped or field adjusted. If the circuit needs a different amperage, you replace the whole breaker with the QC frame in that rating rather than re-rating this one.
3) How does the QC1045 Quicklag breaker connect to the circuit conductors?
It is a cable-in/cable-out breaker, so both the line and the load side terminate on wire lugs rather than the breaker plugging onto a panel bus stab. Plan your wire routing and terminations accordingly; this is not a drop-on plug-in style connection.
4) What is the exact part number to order for the 45A single-pole Quicklag breaker?
Order by manufacturer part number QC1045, a B-Line Quicklag QC type breaker. One model covers it; there are no finish, trip, or terminal options to specify. The QC prefix is the frame family, 1 the pole count, and 45 the amperage.
5) Why does a thermal-magnetic breaker like the Quicklag QC1045 matter for motor and industrial loads?
A thermal-magnetic breaker uses two trip elements: a thermal element that responds slowly to sustained overload, and a magnetic element that trips fast on a short circuit. That combination lets a 45 amp circuit ride through normal inrush on a motor or transformer start while still clearing a bolted fault instantly. The trip on the QC1045 is fixed, so it protects to 45 amps and nothing else.
How fast can I get the B-LINE QC1045 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 QC1045 come with a warranty?
Absolutely. The B-LINE QC1045 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 QC1045?
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 QC1045 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.