Eaton GHQ Series Thermal Magne...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$121.19
Eaton GHQ Series Thermal Magnetic Circuit Breaker

Eaton GHQ Series Thermal Magnetic Circuit Breaker

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Model: GHQ1020

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

$121.19
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Eaton GHQ Series Thermal Magnetic Circuit Breaker 277V 14kAIC GDB Frame

Professional Circuit Protection with Thermal-Magnetic Technology

The Eaton GHQ Series thermal-magnetic circuit breaker delivers reliable circuit protection at 277V with 14kAIC interrupt rating. Built on the proven GDB frame platform, this UL 489 certified breaker provides dependable overcurrent protection with non-interchangeable trip characteristics and includes integrated shunt trip capability for enhanced control applications.

Professional Features & Benefits

  • Thermal-Magnetic Trip Operation: Provides precise overcurrent protection for a range of circuit loads with reliable thermal-magnetic trip operation.
  • 277V Design: Optimized for commercial and industrial lighting circuits and loads requiring higher voltage capacity.
  • 14kAIC Interrupt Rating: Safely interrupts fault currents up to 14,000 amperes, ensuring system protection under high fault conditions.
  • GDB Frame Construction: Compact 1" per-pole width design maximizes panel space utilization while maintaining robust mechanical performance.
  • UL 489 Certification: Meets stringent safety and performance standards for molded case circuit breakers in commercial applications.
  • Shunt Trip Capability: Integrated 120-240V shunt trip enables remote breaker operation for emergency shutdown and control system integration.
  • Load Clip Included: Complete installation package includes 4A33462H01 load clip for secure panel mounting and connection.

Technical Specifications

  • Catalog Notes: Includes 4A33462H01 load clip.
  • Certifications: UL 489
  • Circuit Breaker Type: GHP
  • Frame Size: GDB
  • Interrupt Rating: 14 kAIC
  • Product Details: Thermal-magnetic circuit breaker
  • Product Height: 2.9 in
  • Product Length Depth: 2.9 in
  • Product Weight: .4 lb
  • Product Width: 1 in per pole
  • Shunt Trip: 120-240V
  • Trip Type: Non-Interchangeable
  • Voltage Rating: 277V

Professional Applications

  • Commercial Lighting Circuits
  • Industrial Control Panels
  • HVAC Equipment Protection
  • Motor Control Centers
  • Emergency Power Systems
  • Building Automation Systems
  • Electrical Distribution Panels

Why Choose Eaton Quality?

Eaton circuit breakers deliver proven reliability with UL 489 certification and robust GDB frame construction. The compact design and integrated shunt trip capability provide professional-grade circuit protection with enhanced control system compatibility for demanding commercial and industrial applications.

Variant Specifications

Number of PolesAmperage OptionSKU
Single-Pole20AGHQ1020
Two-Pole20AGHQ2020
Two-Pole30AGHQ2030

Manufacturer Resources

Product Specs

Frame Size:
GDB
Catalog Notes:
Includes 4A33462H01 load clip.
Department:
Electrical
Product Type:
Circuit Breaker
Certifications:
UL 489
Trip Type:
Non-Interchangeable
Interrupt Rating:
14 kAIC
Product Group:
Circuit Protection
Circuit Breaker Type:
GHP
Product Details:
Thermal-magnetic circuit breaker
Product Subgroup:
Circuit Breakers

Eaton GHQ1020 – Frequently Asked Questions

1) Will the Eaton GHQ breaker work on a 277V lighting circuit?
Yes. The GHQ Series is rated 277V, which is the common commercial lighting leg off a 480/277V wye system. Interrupting rating is 14 kAIC, so it can clear a fault up to 14,000 amps at that voltage. Two-pole versions (GHQ2020, GHQ2030) cover 480V-class two-wire loads on the same frame.
2) Can I change the amp rating on a GHQ breaker after it's installed?
No. The trip unit is non-interchangeable, so the amperage is fixed at the factory. If the load changes you replace the whole breaker, not a trip module. Order the rating you need up front: 20A single-pole, 20A two-pole, or 30A two-pole.
3) Does the Eaton GHQ breaker support remote tripping for an emergency shutdown?
It does. The GHQ carries an integrated shunt trip rated 120-240V, so a remote contact, fire alarm relay, or BMS output can trip the breaker without anyone at the panel. Wire the shunt coil to a control source inside that 120-240V band.
4) Is the GHQ a branch-circuit breaker or a supplementary protector?
It's a true branch-circuit breaker. The GHQ is listed to UL 489, which is the molded case circuit breaker standard, not UL 1077 supplementary protection. That distinction matters on an inspection: UL 1077 devices cannot serve as branch-circuit overcurrent protection, UL 489 devices can.
5) Is anything else needed to mount a GHQ breaker, or is the load clip included?
The 4A33462H01 load clip ships with the breaker, so the line-side connection hardware is in the box. No separate clip order is required.
6) Thermal-magnetic vs electronic trip - which should I use for a motor or HVAC circuit?
The GHQ is thermal-magnetic: a bimetal element handles sustained overloads and a magnetic element handles short circuits instantly. That combination rides through normal motor inrush while still clearing a bolted fault, which is why it suits HVAC equipment, motor control centers, and control panels. Electronic trip units are what you go to when you need adjustable pickup and delay settings for coordination; the GHQ's curve is fixed and non-interchangeable.
7) How do I identify the right Eaton GHQ part number for a two-pole 30 amp circuit?
GHQ2030. The numbering runs GHQ, then the pole count, then the amperage: GHQ1020 is one pole at 20A, GHQ2020 is two poles at 20A, GHQ2030 is two poles at 30A. All three sit on the GDB frame with the same 14 kAIC rating.
How fast can I get the Eaton GHQ1020 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 GHQ1020 come with a warranty?
Absolutely. The Eaton GHQ1020 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 GHQ1020?
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 Eaton GHQ1020 from ZenSupply?
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