Leviton 20A 3-Way Extra Heavy-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.01
Leviton 20A 3-Way Extra Heavy-Duty Industrial/Specification Grade Toggle Switch, 120/277V

Leviton 20A 3-Way Extra Heavy-Duty Industrial/Specification Grade Toggle Switch, 120/277V

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Model: 1221-SI

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

$4.01
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Leviton 20A 3-Way Extra Heavy-Duty Industrial/Specification Grade Toggle Switch, 120/277V

The Leviton 20A 3-Way Extra Heavy-Duty Industrial/Specification Grade Toggle Switch delivers rugged, code-compliant switching for demanding commercial and industrial environments. Rated 120/277-Volt AC at 20-Amp, this Specification Grade toggle switch is engineered as an AC Quiet Switch for smooth, silent operation in high-traffic facilities. Built to Extra Heavy-Duty standards, it is designed for professionals who need dependable performance across frequent daily switching cycles. This family is available across multiple toggle switch configurations to match a variety of circuit and control requirements.

Key Features

  • Electrical Rating: 120/277-Volt AC, 20-Amp rating supports demanding commercial and industrial branch circuits.
  • 3-Way Switching: 3-Way configuration allows control of a single fixture or circuit from two separate locations.
  • Specification Grade: Built to Specification Grade standards for reliability in professional and industrial installations.
  • Extra Heavy-Duty Construction: Extra Heavy-Duty Industrial/Specification Grade build for long-term durability under frequent use.
  • Quiet Operation: AC Quiet Switch mechanism provides smooth, low-noise toggle action.
  • Model Family Range: Offered across multiple toggle switch configurations to suit different pole and switching arrangements.

Technical Specifications

  • Grade: Specification
  • Voltage: 120/277V
  • list_batch: LEV-VARMACHINE-20260803

Typical Applications

  • Commercial and Industrial Lighting Control
  • Multi-Location 3-Way Switching Circuits
  • Panelboard and Electrical Room Installations
  • Extra Heavy-Duty Industrial Facilities
  • Renovation and New Construction Electrical Work

Why Leviton?

Leviton Extra Heavy-Duty Industrial/Specification Grade toggle switches are engineered for professionals who demand reliable, code-compliant performance on every job. With Specification Grade construction and a 120/277-Volt, 20-Amp rating, this AC Quiet Switch is built to withstand frequent use in commercial and industrial electrical systems while delivering consistent, silent operation.

Manufacturer Resources

Product Specs

Voltage Rating:
120/277V
Grade:
Specification
Product Type:
3-Way Toggle Switch
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Toggle Switches

Leviton 1221-SI – Frequently Asked Questions

1) Will a Leviton 1221/1222/1223 series toggle switch work on a 277V lighting circuit?
Yes. These Leviton extra heavy-duty industrial/specification grade toggle switches are rated 120/277V AC at 20A, so they run on either a standard 120V branch circuit or a 277V commercial lighting circuit fed from a 480/277V system. That dual rating is why they show up on office, warehouse and school lighting jobs where the fixtures are 277V.
2) What does 3-way switching mean, and do I need two of these switches?
A 3-way setup controls one light or circuit from two separate locations, so yes, you need a pair of 3-way switches wired with a traveler pair between them. Typical use is a corridor with a switch at each end or a stairwell top and bottom. If you only ever switch the load from one spot, a single-pole device is what you want instead.
3) What can I use instead of a Leviton 1223 three-way toggle switch if I need a different brand?
The closest cross-brand match ZenSupply carries is the Eaton Arrow Hart industrial grade three-way toggle switch, also rated 20A at 120/277V. Pass & Seymour has two specification grade 20A options as well: the PS20AC3W, an industrial extra heavy duty specification grade toggle in white, and the CS20AC3I commercial specification grade toggle in ivory. Any of those keep you in the same duty class for a commercial lighting circuit.
4) Can I use a Bryant 4801W instead of a Leviton 1221 3-way switch?
No, not on a 3-way circuit. The Bryant 4801W is a single-pole 15A 277V AC toggle switch, so it has neither the three-way switching arrangement needed to control a fixture from two locations nor the 20A rating the Leviton family carries at 120/277V. Use the 4801W only where a single-pole device at 15A is what the circuit calls for; for a two-location control point, stay with a three-way device.
5) What is the closest cross-brand equivalent to the Leviton 1221 series 20A 3-way toggle switch?
The Eaton Arrow Hart industrial grade three-way toggle switch is the closest direct match: it is a three-way toggle rated 20A at 120/277V, the same switching configuration and electrical rating as the Leviton 1223 3-way models. Both are built to industrial duty for commercial lighting control. Confirm color and strap style against what is already installed in the room, since a 3-way circuit depends on both ends of the travelers being wired to compatible devices.
6) Is a specification grade switch worth it over a residential builder-grade toggle for a commercial building?
For commercial and industrial work, yes. This Leviton line is built to specification grade, extra heavy-duty standards, meaning the contacts and mechanism are made for frequent daily switching rather than the handful of cycles a home switch sees. It also carries the 277V rating that residential-grade devices do not, so it is the device that actually works on a commercial lighting feeder. In a break room, corridor or shop floor where the switch gets hit dozens of times a day, that is the difference between a device that lasts and a callback.
7) What Leviton model numbers are in this extra heavy-duty toggle switch family?
The family covers Leviton 1221-2, 1221-SI, 1221-SW, 1222-2I, 1222-2W, 1223-2I, 1223-2R, 1223-SR and 3031-2W. The base number identifies the switching arrangement and the letters after it identify the color, so if you are matching devices already installed in a building, order by the full number including the suffix rather than just the four digits.
8) What is the difference between a Pass and Seymour TradeMaster toggle switch and the Leviton extra heavy-duty industrial switch?
The Pass and Seymour 660G and 663LAG are TradeMaster grounding toggle switches in thermoplastic, offered in brown satin and light almond respectively. The Leviton 1221 family is built to extra heavy-duty industrial/specification grade and is rated 120/277V. TradeMaster devices are a general-purpose grounding switch line; the Leviton devices are aimed at frequent-cycle commercial and industrial switching. If your drawing specifies specification grade, the TradeMaster is not the device that satisfies it.
9) Is a commercial grade toggle switch the same as an industrial extra heavy duty one?
They are not the same duty class even when both are specification grade. The Pass and Seymour CS20AC3I is described as commercial 20A specification grade, while the PS20AC3W is industrial extra heavy duty specification grade. The Leviton 1221 family is the extra heavy-duty industrial/specification grade build intended for frequent daily switching cycles. For a high-cycle corridor, gym, or plant floor, the extra heavy duty devices are the ones written for that service; a commercial grade device is aimed at lighter cycle counts.
10) I need an ivory 20A specification grade toggle switch - what are my options besides Leviton?
The Pass and Seymour CS20AC3I is a commercial 20A specification grade toggle switch in ivory. On the Leviton side, ivory appears in the family as the 1222-2I and 1223-2I models. Both routes give you a 20A specification grade device; choose based on which pole configuration the circuit needs and which brand your facility already standardizes on for spare stock.
11) Why is it called an AC quiet switch?
The mechanism is an AC quiet design, which gives a smooth toggle action without the loud snap of an older mechanical switch. That matters in occupied spaces, offices, classrooms, patient areas and hotel corridors, where a hard clack every time someone flips a light gets noticed. The switching performance is the same 20A, 120/277V rating either way.
12) Are these Leviton toggle switches available in more than one color for matching existing devices?
Yes. The suffix on each model number sets the color, and the range spans several, so you can match ivory, white or other existing device colors already in the building. Order the complete number, for example 1223-2I or 1223-2R, rather than the base 1223, or you may get a color that does not match the rest of your wallplates.
13) For a light almond or brown device to match existing plates, what toggle switch should I order?
The Pass and Seymour 663LAG TradeMaster grounding toggle is light almond thermoplastic and the 660G is brown satin thermoplastic, which covers those two colors. The Leviton extra heavy-duty family runs in colors including ivory, white, and red across models such as 1221-SI, 1221-SW, and 1223-2R. If color match to an existing fleet of plates is the driver, pick the color first, then confirm the pole configuration and rating match the circuit.
How fast can I get the Leviton 1221-SI 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 1221-SI come with a warranty?
Absolutely. The Leviton 1221-SI 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 1221-SI?
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 1221-SI from ZenSupply?
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