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Home /Compactor Parts /Electrical Parts /Buttons/Switches/Keys/Legends /30 MM

30 MM Key Switch

30 MM Selector Switch

30 MM Push Only Switch

30 MM Legends

30 MM Contacts And Replacement Keys

30mm Push Buttons, Key Switches & Emergency Stops

30mm push buttons, key switches, selector switches, emergency stops, and legend plates for industrial trash compactor control panels. The classic industrial standard size — used on most pre-2015 commercial and industrial compactors. OEM-compatible with Marathon, PTR, Wastequip, Harmony, and SP Industries.

What this page covers

30mm is the panel hole diameter for the classic industrial push-button standard. The size has been used for decades because it's large enough to operate reliably with work gloves on, visible from across the room, and tolerant of mounting-hole imperfections. Most pre-2015 commercial and industrial compactors use 30mm.

PRT stocks the full range of 30mm components: push buttons (flush, extended, mushroom), key switches, selector switches, emergency stops, contact blocks, and legend plates. All use the same snap-in contact block design so you can rebuild a panel without specialty tools.

How to choose

Order by function (push button, key, selector, e-stop), color (for push buttons — red = stop, green = start, yellow = warning, blue = info, white = neutral), and voltage (for illuminated buttons — typically 24V DC or 120V AC).

If you're rebuilding a control panel and not sure which contact block configuration fits, PRT customer service can recommend based on the panel's wiring schematic.

30mm products in stock

  • 30mm Key Switch2-position and 3-position operator authorization switches.
  • 30mm Selector Switch2-position and 3-position function selectors.
  • 30mm Push Only SwitchStandard momentary and maintained push buttons.
  • 30mm Mushroom Emergency StopMushroom-head e-stops with push-pull or twist-release reset.
  • 30mm LegendsLabeled face plates for all 30mm button types.
  • 30mm Contact Blocks1-NO, 1-NC, 2-NO, 1-NO/1-NC standard configurations.
  • 30mm Replacement KeysStandard and tamper-resistant key configurations.

Frequently asked questions

How do I know if my compactor uses 30mm or 22.5mm buttons?

Measure the panel hole diameter. 30mm is the larger classic size; 22.5mm is the smaller modern size. They're not interchangeable. Most pre-2015 compactors use 30mm.

Can I mix 30mm and 22.5mm buttons in the same control panel?

Yes, if the panel has both sizes of holes. But it's unusual — most panels are designed for one size or the other. If you're rebuilding, pick one size and stay consistent.

Do PRT 30mm buttons fit Allen Bradley and Schneider control panels?

Yes. 30mm is an industry-standard panel cutout — PRT buttons fit any panel cut for 30mm hardware, regardless of original brand.

Are 30mm illuminated push buttons available?

Yes. LED-illuminated 30mm buttons are stocked in standard colors (red, green, yellow, blue, white) at 24V DC and 120V AC.

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