Eaton Quicklag QC Three-Pole T...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$597.51
Eaton Quicklag QC Three-Pole Thermal-Magnetic Industrial Circuit Breaker, 240V, 10 kAIC

Eaton Quicklag QC Three-Pole Thermal-Magnetic Industrial Circuit Breaker, 240V, 10 kAIC

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Model: QC3040H

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

$597.51
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Eaton Quicklag QC Three-Pole Thermal-Magnetic Industrial Circuit Breaker, 240V, 10 kAIC

The Eaton Quicklag QC Three-Pole Thermal-Magnetic Industrial Circuit Breaker delivers dependable overcurrent protection for industrial electrical systems. Rated 40 A with a 240V voltage rating and a 10 kAIC interrupt rating, this three-pole thermal-magnetic breaker is built for demanding industrial circuit protection applications. The QC-type breaker features a cable-in/cable-out connection and a non-interchangeable trip design for consistent, code-compliant performance.

Key Features

  • Amperage Rating: 40 A rating provides reliable overcurrent protection for industrial circuits.
  • Three-Pole Configuration: Three-pole design supports three-phase industrial circuit protection.
  • Thermal-Magnetic Trip: Thermal-magnetic trip mechanism protects against both overload and short-circuit conditions.
  • Voltage Rating: Rated 240V for compatibility with standard industrial electrical systems.
  • Interrupt Rating: 10 kAIC interrupt rating for dependable fault-current interruption.
  • Cable-In/Cable-Out Connection: Simplifies wiring in industrial panelboards and load centers.
  • Non-Interchangeable Trip: Non-interchangeable trip option ensures a dedicated, consistent protection setting.
  • QC Circuit Breaker Type: Quicklag QC-type construction engineered for industrial-grade reliability.

Technical Specifications

  • Connection: Cable-in/cable-out
  • Voltage Rating: 240 V - 240 V
  • Type: Industrial circuit breaker
  • Number of Poles: Three-pole
  • Options: Non-interchangeable
  • Interrupt Rating: 10 kAIC
  • Circuit Breaker Type: QC
  • Trip Type: Thermal-magnetic
  • Warranty: 1 year

Typical Applications

  • Industrial Electrical Distribution Panels
  • Three-Phase Motor and Equipment Protection
  • Commercial and Industrial Load Centers
  • Panelboard and Switchboard Circuit Protection
  • Renovation and New Industrial Construction Projects

Why Eaton?

Eaton's Quicklag QC Series thermal-magnetic circuit breakers are engineered for dependable, code-compliant performance in demanding industrial environments. With a 240V, 10 kAIC rating and durable three-pole construction, this breaker delivers the reliable circuit protection professional electricians expect from Eaton. Backed by a 1-year warranty, it's a trusted choice for industrial panelboard and load center installations.

Manufacturer Resources

Product Specs

Connection:
Cable-in/cable-out
Voltage Rating:
240V
Product Type:
Circuit Breaker
Warranty:
1 year
Number of poles:
Three-pole
Option Details:
Non-interchangeable
Interrupt rating:
10 kAIC
Circuit breaker type:
QC
Trip Type:
Thermal-magnetic
Department:
Electrical
Amperage Rating:
40A
Configuration:
3-Pole
Connection Type:
Cable-in/Cable-out
Series:
QC
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

Eaton QC3040H – Frequently Asked Questions

1) What amp ratings does the Eaton Quicklag QC three-pole breaker come in?
Five ratings across the three-pole QC line: 30A (QC3030H), 40A (QC3040H), 50A (QC3050H), 70A (QC3070H) and 90A (QC3090H). All are 240V, 10 kAIC, thermal-magnetic, with a non-interchangeable trip, so the amperage is fixed at the breaker and cannot be changed in the field. Order by the specific catalog number for the amperage your circuit calls for.
2) Can I use a QC3040H on a 480V panel?
No. The QC three-pole breakers are rated 240V only, so they belong on 240V systems (including 240V three-phase). A 480V or 480Y/277V panel needs a breaker rated for that system voltage; putting a 240V-rated device on it is a misapplication regardless of the amp rating.
3) How does the QC breaker wire in, and does it bolt to a bus?
Cable-in/cable-out. Conductors land on lugs at both ends of the breaker rather than the breaker plugging or bolting onto a panel bus. That makes it suited to enclosed or standalone circuit-protection applications where you are feeding through with cable, and it means you should not plan on it snapping into a load center bus stab.
4) Will a three-pole QC breaker protect a three-phase motor circuit?
Yes, the three-pole configuration switches and protects all three phases together, which is what a 240V three-phase motor or equipment feeder needs. The thermal-magnetic trip handles both sustained overload and short circuits. Motor circuits are commonly sized above the motor full-load amps under NEC rules, so pick the amperage from your branch-circuit calculation rather than matching the motor nameplate amps one to one.
5) What does non-interchangeable trip mean on the Eaton QC breaker, and can I change the amp rating later?
It means the trip unit is fixed. The amp rating is set at the factory and cannot be swapped or adjusted in the field, so a 30A QC3030H stays 30A for its life. If the load grows, you replace the breaker with a higher-rated catalog number, up to 90A in the three-pole QC line. The upside is that nobody can quietly upsize the protection on your circuit during maintenance.
6) Thermal-magnetic or electronic trip for a 240V three-phase branch circuit?
For a straightforward 240V branch or feeder, thermal-magnetic is the normal choice and it is what the QC three-pole breaker uses: a bimetal element for sustained overload and a magnetic element for short circuits, with no settings to dial in. Electronic trip units earn their cost where you need adjustable long-time, short-time and instantaneous pickups to coordinate selectively with downstream devices, or metering built in. If nobody is going to tune the curve, the fixed thermal-magnetic unit is the simpler install.
7) Can I use one pole of a three-pole QC breaker for a single 120V circuit?
That is not the right part for it. The three-pole QC is built as a single device with all three poles tied to a common trip for three-phase work at 240V. Breaking out one pole for a single-phase 120V load wastes two poles and leaves a mechanically linked handle controlling circuits you did not intend. For a single-phase load, order a one- or two-pole breaker of the appropriate rating instead.
8) I need to standardize breakers across several buildings. Are the QC three-pole units all the same family?
They are, which is what makes them straightforward to stock. Every three-pole QC in the range shares the same 240V rating, 10 kAIC interrupting rating, thermal-magnetic trip and cable-in/cable-out terminations; only the amperage changes across the 30, 40, 50, 70 and 90 amp catalog numbers. For an MRO crib that means one spec sheet and five part numbers rather than mixed constructions.
How fast can I get the Eaton QC3040H 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 Eaton QC3040H come with a warranty?
Absolutely. The Eaton QC3040H 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 Eaton QC3040H?
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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