Eaton QHPX1040 Industrial Thermal-Magnetic Circuit Breaker - 42 kAIC
Part Number: QHPX1040
Quick Summary
Eaton Quicklag thermal magnetic circuit breaker protects industrial power systems by delivering fast overcurrent protection for panels and feeders. Across demanding environments, nuisance trips and slow response can drive costly downtime and risk equipment damage. UL Listed, CSA Certified, and HACR Rated, this unit meets essential safety and efficiency standards for modern facilities. With a 40 A rating and 42 kAIC interrupt capability, it integrates cleanly into 120/240 V feeders, reducing wiring complexity and maintenance overhead. Plug-on mounting and a compact footprint support rapid deployment across multiple control panels, delivering clear business value through improved reliability and lower total cost of ownership.
Product Information
Extended Description
QHPX1040 Eaton: Eaton Quicklag Type QHP Industrial Thermal-Magnetic Circuit Breaker,Industrial circuit breaker,40 A,42 kAIC,Single-pole,120/240 V,Thermal-magnetic,Q17,QHPX,Non-Interchangeable
Product Name
Eaton Quicklag thermal magnetic circuit breaker
Catalog Number
QHPX1040
UPC
786679152102
Product Length/Depth
3 in
Product Height
1 in
Product Width
3 in
Product Weight
0.3 lb
Warranty
1 year
Compliances
HACR Rated
Certifications
UL Listed CSA Certified
Circuit breaker type
QHPX
Mounting Method
Plug-on
Number of poles
Single-pole
Type
Industrial circuit breaker
Amperage Rating
40 A
Interrupt rating
42 kAIC
Trip Type
T268
Voltage rating
120/240 V
Options
Non-Interchangeable
Quantity
17
Feature → Business Impact → Application: The Eaton Quicklag QHPX1040 employs thermal-magnetic trip technology to provide precise overload protection and instantaneous fault interruption, improving system reliability and reducing equipment wear. In practical terms, this means fewer nuisance trips and shorter downtime during high-demand operation, especially on 40 A circuits feeding motors or automation loads. Application: ideal for 120/240 V single-pole circuits in industrial panels where uptime and protection are critical. Feature → Business Impact → Application: The plug-on mounting design simplifies installation, enabling quick squarely aligned placement and secure bus-bar connections with minimal wiring complexity. Resulting efficiency gains translate to faster panel commissioning and easier panel swaps in multi-panel environments. Application: suitable for retrofit projects and new builds where fast deployment reduces project timelines. Feature → Business Impact → Application: UL Listed and CSA Certified status, along with HACR rating, ensures compliance with major safety standards, aiding audits and reducing procurement risk. This supports enterprise-wide sourcing programs and minimizes third-party testing needs. Application: preferred for regulated facilities, conveyors, and packaging lines that demand certified, reliable protection. Feature → Business Impact → Application: The 42 kAIC interrupt rating delivers strong short-circuit protection for demanding loads, guarding downstream equipment and minimizing arc-flash exposure during faults. Application: critical for high-energy industrial feeders, machine centers, and robotics cells that require robust protection. Feature → Business Impact → Application: A compact 3 in L by 3 in W footprint and light 0.3 lb weight improve cabinet density and reduce enclosure space requirements, enabling leaner panel designs. Application: suitable for multi-breaker configurations and tight-control panels in manufacturing environments. Feature → Business Impact → Application: The 1-year warranty reinforces supplier support and total cost of ownership assurances, helping procurement justify standardization across sites. Application: ongoing maintenance programs and long-term asset management in facilities with frequent panel servicing.
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FAQs
QHPX1040 uses a plug-on mounting approach that simplifies installation by allowing secure deflection-free connection to standard panel rails. Ensure the mounting area accommodates its compact 3 in by 3 in footprint and aligns with the panel’s bus connections. Follow Eaton’s datasheet for torque guidance and sequence to prevent cross-talk in dense panel layouts.
The device combines a bimetallic thermal element for overload protection with a magnetic element for instantaneous fault interruption. This dual mechanism yields selective tripping on sustained overloads and short-circuit events, reducing damage to downstream equipment while limiting fault expansion within 120/240 V circuits rated at 40 A and up to 42 kAIC.
Yes. The QHPX1040 is HACR rated, meaning it complies with heat, air, cooling, and refrigeration equipment protective requirements. This makes it suitable for motor control centers, HVAC systems, and other commercial/industrial applications where HACR approval supports compliant protection and safer operation, alongside UL Listed and CSA Certified conformity.
The QHPX1040 carries UL Listed and CSA Certified markings, confirming adherence to recognized safety standards. These certifications simplify supplier qualification, streamline audits, and support cross-site procurement programs, reducing the time and cost required to validate protection devices for regulated manufacturing and processing environments.
Investing in QHPX1040 can lower total cost of ownership through reduced nuisance trips, faster panel deployments, and longer equipment life due to robust overcurrent protection. The 1-year warranty adds supplier confidence, while the high interrupt rating of 42 kAIC minimizes fault damage, contributing to lower maintenance and downtime costs over time.