Square D GJL Shunt Trip, 480VA...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$11.47
Square D GJL Shunt Trip, 480VAC, 13mA

Square D GJL Shunt Trip, 480VAC, 13mA

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Model: SQUGSH

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

$11.47
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Square D GJL Shunt Trip, 480VAC, 13mA

The Square D GJL Shunt Trip is a factory-installed circuit breaker accessory rated 480-480 V AC, engineered to remotely trip a compatible GJL-frame breaker on command from an external control or protective relay circuit. Drawing 13mA at rated voltage, this shunt trip provides fast, reliable remote disconnection for critical circuit protection in commercial and industrial electrical systems. Backed by UL Listing and CSA certification, it delivers dependable performance for code-compliant panelboard and switchgear installations.

Key Features

  • Rated Voltage: 480-480 V AC for compatibility with 480V distribution systems.
  • Trip Coil Current: 13mA draw at rated voltage for efficient remote tripping.
  • Shunt Trip Function: Enables remote, electrically initiated tripping of the associated GJL circuit breaker from a control switch, fire alarm system, or protective relay.
  • Tightening Torque: 0.7-1.0 N.m for secure, properly torqued terminal connections during installation.
  • Field-Installed Accessory: Designed as a factory or field-installable trip unit for Square D GJL-series breakers.
  • Listed & Certified: UL Listed and CSA certified for use in North American electrical installations.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • California Prop 65 Warning: this product can expose users to chemicals including DINP and DIDP, known to the State of California to cause cancer and reproductive harm; see www.p65warnings.ca.gov for details.

Technical Specifications

  • Serviceability: No
  • Warranty: 18 months
  • Warranty Period: 18 months
  • Returnability: No
  • Sustainable Packaging: No
  • Traceability: No
  • ROHS Eur In Scope: No
  • Return Indicator: N
  • Legacy WEEE Scope: Out

Typical Applications

  • Remote Circuit Breaker Tripping in Panelboards and Switchgear
  • Fire Alarm and Life-Safety Trip Interlocks
  • Commercial and Industrial Electrical Distribution Systems
  • Emergency Power Disconnect Circuits
  • Protective Relay-Initiated Breaker Tripping

Why Square D?

Square D shunt trip accessories are built to the same rigorous standards as the GJL breakers they serve, with UL Listing and CSA certification confirming safe, reliable operation. For electrical professionals specifying remote trip functionality on 480VAC systems, this accessory delivers the dependable, code-compliant performance Square D is known for.

Manufacturer Resources

Product Specs

Product Type:
Shunt Trip & Auxiliary Contact
Series:
GJL
Voltage Rating:
480V
Amperage Rating:
13mA
Listing:
UL Listed
Standards:
CSA
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

Square D SQUGSH – Frequently Asked Questions

1) What does the Square D GSH shunt trip actually do on a breaker?
The GSH is an accessory coil for Square D GJL-frame breakers that trips the breaker on an electrical signal from somewhere else in the building. Energize the coil from a control switch, fire alarm relay, or protective relay contact and the breaker opens. It does not sense current or fault conditions itself, so it adds no protection on its own, only remote and interlocked tripping.
2) Will the GSH shunt trip work on a 277V or 120V control circuit?
No. The GSH coil is rated 480 V AC and that is the voltage the control circuit has to supply. If your trip signal comes from a 120V control transformer or a 277V leg, this coil is the wrong one and you need a shunt trip matched to that control voltage. Coil draw is 13mA at rated voltage, so the contact or relay initiating the trip only has to carry a very small current.
3) Is this shunt trip acceptable for a fire alarm elevator shutdown or emergency disconnect in a commercial building?
It is intended for exactly that kind of duty: fire alarm and life-safety trip interlocks, emergency power disconnect circuits, and relay-initiated breaker tripping in panelboards and switchgear. It carries UL Listing and is CSA certified for North American installations. The interlock must be driven from a 480 V AC trip signal to match the coil.
4) What is the difference between the Square D GSH shunt trip and the Eaton Power Defense shunt trip accessory?
Both are shunt trip accessories that let an external control circuit trip the breaker they are mounted in, but they serve different breaker platforms and different control voltages. The Square D GSH is a GJL-series accessory rated 480 V AC with a 13 mA trip coil draw, UL Listed and CSA certified. The Eaton accessory is built for Eaton's Power Defense series and is rated 110-130 V AC / 125 V DC with screw terminal connections. So the control voltage available at the panel is the deciding factor: use the GSH where the trip circuit is 480 V AC on a Square D GJL frame, and the Eaton unit where the trip signal is nominal 120 V AC or 125 V DC on a Power Defense breaker.
5) What torque should the shunt trip terminals be tightened to?
Terminal screws on the GSH take 0.7 to 1.0 N.m. Use a torque screwdriver on the control wiring; a 13mA coil circuit gives you no thermal margin from a loose joint, and an unseated lead means the breaker simply will not trip when the alarm calls for it.
6) Can this shunt trip be added in the field, or does it have to be ordered with the breaker?
It can go in either way. Square D lists the GSH as a factory or field installable trip unit for GJL-series breakers, so you can retrofit remote trip onto a GJL breaker already in service rather than replacing the breaker. Note it is not a serviceable part, so a failed coil is replaced, not repaired.
7) Is a shunt trip the right choice, or should I be looking at an undervoltage release?
A shunt trip like the GSH opens the breaker when you energize the coil, so it needs a live 480 V AC signal present at the moment you want the trip. An undervoltage release does the opposite, tripping when control voltage disappears, which is what you want for fail-safe loss-of-power schemes. For fire alarm shutdown, elevator recall, and remote pushbutton disconnect, where a relay contact closes to command the trip, the shunt trip is the correct accessory.
8) My fire alarm trip circuit runs on 120 V AC - what shunt trip should I use instead of the Square D GSH?
The Square D GSH coil is rated 480 V AC, so it is intended for a 480 V trip signal rather than a 120 V control circuit. For a nominal 120 V AC or 125 V DC trip signal, the Eaton Power Defense shunt trip accessory is rated 110-130 V AC / 125 V DC and uses screw terminals, but it mounts only in Eaton Power Defense breakers. If your breaker is a Square D GJL frame, confirm the control voltage at the interlock before ordering, since the coil rating has to match the signal your fire alarm or relay panel supplies.
9) Is a shunt trip the same thing as an undervoltage release or auxiliary switch?
No. A shunt trip such as the Square D GSH trips the breaker only when it is energized by an external command - a control switch, fire alarm system, or protective relay - drawing 13 mA at its rated 480 V AC. An undervoltage release does the opposite, tripping when control power is lost, and an auxiliary switch only reports breaker position without tripping anything. The Eaton Power Defense unit in the same family of accessories is likewise a shunt trip, rated 110-130 V AC / 125 V DC. If the design intent is to trip on loss of power rather than on a signal, a shunt trip is not the right accessory.
10) What part number do I order for the Square D GJL shunt trip?
Order it as GSH, the Square D GJL-frame shunt trip rated 480 V AC with a 13mA coil. There is one configuration, so there is no separate voltage or terminal option to specify.
11) Does the Square D GSH carry a Prop 65 warning?
Yes. Square D notes this accessory can expose users to DINP and DIDP, which California lists as causing cancer and reproductive harm. Details are at www.p65warnings.ca.gov. Facilities buyers in California maintaining a chemical disclosure file should record it against the part.
How fast can I get the Square D SQUGSH 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 Square D SQUGSH come with a warranty?
Absolutely. The Square D SQUGSH 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 Square D SQUGSH?
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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