Leviton 1257 20A SPDT Momentar...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$67.71
Leviton 1257 20A SPDT Momentary Contact Toggle Switch, Back & Side Wired

Leviton 1257 20A SPDT Momentary Contact Toggle Switch, Back & Side Wired

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Model: LEV1257

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

$67.71
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Leviton 1257 20A SPDT Momentary Contact Toggle Switch, Back & Side Wired

The Leviton 1257 is a 20A SPDT momentary contact toggle switch engineered for applications that require a spring-return, push-to-activate control rather than a standard maintained on/off switch. Featuring both back and side wiring terminals, this switch gives electricians flexibility during installation, allowing conductors to be terminated using whichever method best suits the box configuration and workflow on the job. Built to handle a 20A load, the Leviton 1257 is suited for commercial and industrial control circuits, door buzzers, momentary signaling circuits, and other applications where the switch must automatically return to its normal position once released.

Key Features

  • Amperage Rating: Rated for 20A, supporting demanding control and switching circuits.
  • Switching Configuration: SPDT (single-pole, double-throw) momentary contact design springs back to its normal position once the actuator is released, ideal for momentary signaling and control functions.
  • Wiring Flexibility: Back and side wired terminals allow installers to choose the most efficient termination method for the application and box layout.
  • Professional-Grade Toggle Design: Standard toggle-style actuator for straightforward, tactile operation in control panels, equipment, and signaling circuits.
  • Leviton Reliability: Manufactured by Leviton, a recognized name in wiring devices for commercial and industrial electrical work.

Technical Specifications

  • Amperage: 20A
  • Switch Type: SPDT Momentary Contact
  • Wiring: Back & Side Wired
  • Model: 1257

Typical Applications

  • Momentary Control and Signaling Circuits
  • Commercial and Industrial Equipment Panels
  • Door Buzzer and Bell Circuits
  • Push-to-Test and Reset Control Applications
  • General Electrical Renovation and New Construction Wiring

Why Leviton?

Leviton wiring devices are built for dependable, repeatable performance in demanding commercial and industrial environments. The 1257's 20A rating and SPDT momentary contact design make it a practical choice for control and signaling circuits where a spring-return switching action is required, while the back & side wiring options simplify installation for electricians in the field.

Manufacturer Resources

Product Specs

list_batch:
LEV-20260924
Product Type:
Toggle Switch
Amperage Rating:
20A
Configuration:
SPDT Momentary Contact
Connection Type:
Back & Side Wired
Department:
Electrical
Product Subgroup:
Toggle Switches
Product Group:
Wiring Devices

Leviton LEV1257 – Frequently Asked Questions

1) Will the Leviton 1257 toggle switch stay on when I flip it, or does it spring back?
It springs back. The Leviton 1257 is a momentary contact switch, so the toggle returns to its normal position the moment you let go. If you need a switch that holds the circuit on until you flip it again, this is the wrong part, you want a maintained toggle such as the Pass & Seymour CS20AC3I commercial 20A specification grade switch.
2) What does SPDT mean on the Leviton 1257 and how do I wire it for a door buzzer?
SPDT is single pole, double throw: one common terminal and two travelers, so pressing the toggle transfers the common from one contact to the other and it transfers back on release. For a door buzzer or bell you land the hot on common and the buzzer leg on the contact that closes when the toggle is pushed, leaving the other throw unused. That transfer action is also what lets it drive push to test and reset functions where one circuit drops as another makes.
3) I need a 20A toggle switch that stays on instead of springing back - what should I order instead of the Leviton 1257?
The 1257 is a momentary contact device and will not hold its position. For a maintained 20A toggle, the Pass & Seymour CS20AC3I is a commercial 20A specification grade toggle switch in ivory, and the Pass & Seymour PS20AC3W is an industrial extra heavy duty specification grade toggle in white. Both are standard on/off devices rather than spring-return, so pick by the grade and finish your spec calls for.
4) Is the Pass & Seymour PS20AC3W a direct replacement for the Leviton 1257 momentary switch?
No. The Leviton 1257 is a 20A SPDT momentary contact toggle switch, meaning the actuator springs back to its normal position when released. The Pass & Seymour PS20AC3W is an industrial extra heavy duty specification grade toggle switch, a maintained-position device that stays where you put it. If the circuit depends on spring return - a door buzzer, a push-to-test or reset function - the PS20AC3W will not reproduce that behavior. Use it only where a standard maintained on/off switch is what the opening calls for.
5) What is the difference between the Leviton 1257 and a three-way switch like the Eaton Arrow Hart AH1223GY?
Both are single-pole-double-throw in the sense of having two travelers, but they do different jobs. The Leviton 1257 is a 20A SPDT momentary contact switch that returns to its normal position on release, so it is used for signaling and control pulses. The Eaton Arrow Hart industrial grade three-way toggle switch is rated 20A, 120/277V and is a maintained three-way device used to control one load from two locations. A three-way lighting leg needs the Eaton; a buzzer or reset pulse needs the 1257.
6) Can I use the Leviton 1257 momentary switch on a 20 amp circuit?
The 1257 carries a 20A rating, so it handles a 20 amp control or switching load. That rating is the switch's capacity, not a requirement, it will run lighter signaling and control circuits just as well.
7) Does the Leviton 1257 have screw terminals on the side or push-in holes in the back?
Both. The 1257 is back and side wired, so you can push conductors into the back terminals or wrap them under the side screws, whichever suits how tight the box is and how the conductors come in. Useful on retrofit work where existing wire lengths dictate the termination method.
8) Is the Leviton 1257 suitable for an equipment control panel rather than room lighting?
Yes, that is its intended ground. The 1257 is built for commercial and industrial control circuits, equipment panels, momentary signaling, and push to test or reset functions. For general room lighting you want a maintained switch instead, such as the Pass & Seymour PS20AC3W industrial extra heavy duty specification grade toggle.
9) Can the Bryant 4903W be used where the Leviton 1257 is specified?
Only if the circuit does not need momentary action. The Bryant 4903W is a 3-way AC toggle switch rated 20A 277V, commercial grade - a maintained switch for two-location control. The Leviton 1257 is a 20A momentary contact device whose actuator spring-returns once released. They share the 20A class but not the switching behavior.
10) Is the Bryant 4801W an alternative to the Leviton 1257 for a control circuit?
They are not interchangeable. The Bryant 4801W is a 4-Series single-pole 15A 277V AC toggle switch in white, a maintained single-pole device at 15A. The Leviton 1257 is rated 20A and is SPDT momentary contact. A circuit sized for a 20A device and relying on spring return needs the 1257; the 4801W suits straightforward 15A single-pole switching.
11) What is a simpler alternative to the Leviton 1257 for a basic grounded switch replacement?
If the job is a plain grounded toggle swap and no momentary function is involved, the Pass & Seymour 660 Trademaster grounding toggle switch covers it. The Leviton 1257 is a 20A SPDT momentary contact switch with back and side wired terminals, built for spring-return signaling and control duty rather than general-purpose on/off switching.
12) What is the Leviton part number for this momentary toggle switch so I can order the right one?
Order it as Leviton 1257. That is the manufacturer part number for the 20A SPDT momentary contact toggle with back and side wiring.
13) Which of these 20A toggle switches offer back and side wiring like the Leviton 1257?
The Leviton 1257 lists back and side wired terminals, letting the installer terminate whichever way the box layout favors. Among the 20A alternatives, the Pass & Seymour CS20AC3I is a commercial 20A specification grade toggle and the PS20AC3W is an industrial extra heavy duty specification grade toggle - confirm the termination style on those against the panel before committing, and specify the 1257 where the dual back-and-side option is the deciding factor.
How fast can I get the Leviton LEV1257 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 LEV1257 come with a warranty?
Absolutely. The Leviton LEV1257 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 LEV1257?
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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