Leviton 7277 Transient Voltage...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$417.57
$3.21
Leviton 7277 277 VAC 50/60 HZ max. Transient voltage surge suppression module used for hi panel protection system. Continuous Voltage 320 VAC

Leviton 7277 Transient Voltage Surge Suppression Module, 277 VAC

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Model: 7277

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

$417.57
$3.21
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Leviton 7277 Transient Voltage Surge Suppression Module, 277 VAC

The Leviton 7277 is a transient voltage surge suppression module rated 277 VAC at 50/60 Hz max, engineered for use within a hi panel protection system. This module carries a continuous voltage rating of 320 VAC, making it suited for integration into panelboard-level surge protection setups where reliable transient clamping is required. As a wiring device module, the 7277 is designed to slot into supported panel protection systems to help guard connected circuits against damaging voltage spikes.

Key Features

  • Voltage Rating: 277 VAC, 50/60 Hz maximum operating voltage for standard branch circuit applications.
  • Continuous Voltage: Rated for 320 VAC continuous voltage, supporting stable performance under sustained line conditions.
  • Surge Suppression Function: Transient voltage surge suppression module designed to protect downstream equipment from voltage transients.
  • System Integration: Used specifically within a hi panel protection system for coordinated, panel-level surge protection.
  • Module Format: Compact module design intended for installation as part of a larger panelboard protection assembly.

Technical Specifications

Typical Applications

  • Panelboard Surge Protection Systems
  • Commercial and Industrial Electrical Panels
  • 277 VAC Branch Circuit Protection
  • Transient Voltage Surge Suppression Retrofits
  • Wiring Device Panel Modules

Why Leviton?

Leviton engineers the 7277 surge suppression module to deliver dependable transient voltage protection at 277 VAC with a 320 VAC continuous voltage rating, giving electrical professionals a trusted component for hi panel protection systems. Choosing Leviton for panel-level surge suppression supports consistent, code-conscious performance across commercial and industrial installations.

Manufacturer Resources

Technical Information

Product Specs

Department:
Electrical
Product Subgroup:
Unassigned Modules
Product Group:
Wiring Devices
Product Type:
Surge Protector

Leviton 7277 – Frequently Asked Questions

1) Will the Leviton 7277 surge module work on a 277 volt circuit?
Yes. The 7277 is rated 277 VAC at 50/60 Hz maximum, which is the standard line-to-neutral voltage on a 277/480V wye commercial service. It also carries a 320 VAC continuous voltage rating, so it holds up under sustained line conditions above nominal without going into its clamping range.
2) Can I wire a Leviton 7277 surge suppression module directly into a panelboard like a standard SPD?
No. The 7277 is a module used within a hi panel protection system, not a standalone panel-mounted suppressor. It slots into a supported panel protection assembly, so you need the host system in place for it to do anything. If you are protecting a panel that has no such assembly, you are looking for a complete panel-mounted SPD, not this module.
3) I have a failed surge module in an existing Leviton panel protection assembly. Is the 7277 a direct replacement?
The 7277 is the 277 VAC module for a hi panel protection system, so it replaces a 277 VAC module in that system. Pull the failed unit and match the manufacturer part number 7277 and the voltage marking before ordering. If the module you removed is marked for a different voltage, such as a 120V or 480V leg, the 7277 is the wrong part for that position.
4) What is the difference between the 277 VAC rating and the 320 VAC continuous rating on the Leviton 7277?
They describe two different things. 277 VAC at 50/60 Hz is the nominal operating voltage of the circuit the module is applied to. 320 VAC is the maximum continuous operating voltage the module will sit on without conducting, which gives headroom above nominal for normal line swing and temporary overvoltage. If your measured line-to-neutral voltage is routinely climbing toward 320, you have a power quality problem to address before the suppressor becomes the fix.
5) Where in a building would a 277 VAC surge module like this be used?
277 VAC is the common lighting voltage in commercial and industrial buildings fed from a 480/277 wye service, so this module lands in panelboards feeding fluorescent and LED lighting branch circuits, mechanical room panels, and similar 277V distribution. Typical uses are panelboard surge protection, 277 VAC branch circuit protection, and transient suppression retrofits on existing panels.
6) Does the Leviton 7277 module protect the whole panel or just one circuit?
It handles transient clamping at one 277 VAC position within the panel protection assembly. Whole-panel coverage comes from the host hi panel protection system as a whole, with modules populating the positions it supports. On a multi-phase panel you will need a module for each protected leg, not a single 7277.
7) How do I confirm I am ordering the right Leviton surge module?
Go by the manufacturer part number. This is Leviton 7277, and the module itself is marked 277 VAC 50/60 Hz max with a 320 VAC continuous voltage. Leviton's surge module numbering tracks voltage closely, so a single digit difference is a different voltage module. Read the face of the unit you are replacing and match it exactly.
8) Is there a spec sheet for the Leviton 7277 I can hand to the engineer of record?
Yes, Leviton publishes technical information for the 7277 and ZenSupply carries that PDF on the product record. It is the document to attach for submittal review alongside the panel protection system data, since the module's 277 VAC and 320 VAC continuous ratings are what the engineer will be checking against the panel schedule.
How fast can I get the Leviton 7277 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 Leviton 7277 come with a warranty?
Absolutely. The Leviton 7277 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 Leviton 7277?
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 Leviton 7277 from ZenSupply?
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