Please login to find your pricing, which may be different
Cart Register/Login
Login
HOME BREAKDOWNS: Automated Tarp System QUICK RE-ORDER CATALOG ABOUT US SUPPORT
Home /Compactor Parts /Electrical Parts /Buttons/Switches/Keys/Legends

30 MM

22.5 MM

Compactor Push Buttons, Key Switches & Emergency Stops

Industrial push buttons, key switches, emergency stop buttons, and legend plates for trash compactor control panels. Available in 30mm and 22.5mm standard sizes. OEM-compatible with Marathon, PTR, Wastequip, Harmony, and SP Industries.

What this page covers

Push buttons, key switches, and emergency stops are the operator's primary interface with the compactor. Push buttons start the cycle and select functions. Key switches restrict cycle authorization to trained operators. Emergency stops cut the cycle instantly when a safety event happens. Legend plates label everything so the operator knows what they're touching.

These components fail predictably from operator wear, vandalism, weather exposure, and contamination. PRT stocks replacements in the two industry-standard sizes — 30mm (the classic 'big button' size) and 22.5mm (the more compact modern standard) — with contact blocks rated for industrial compactor applications.

How to choose

Identify the button or switch by its size (30mm or 22.5mm — measure the panel hole diameter), its function (start, stop, e-stop, key, selector), and its contact rating. Sizes are not interchangeable; the panel hole determines which size fits.

If you're replacing a vandal-damaged or weather-degraded button, consider upgrading to an IP69K-rated industrial-grade button for longer service life. PRT can recommend OEM-equivalents and upgraded options.

Button and switch categories

  • 30mm Push ButtonsThe classic industrial standard — flush, extended, and mushroom-head emergency stops.
  • 22.5mm Push ButtonsCompact modern standard — same functions in a smaller panel footprint.
  • Key SwitchesOperator-authorization switches. 2-position and 3-position.
  • Selector SwitchesMulti-position function selectors.
  • Emergency Stop ButtonsMushroom-head e-stops with push-pull or twist-release reset.
  • Legend PlatesLabeled face plates for buttons, switches, and e-stops.
  • Contact BlocksSnap-in contact blocks for any 30mm or 22.5mm button.

Frequently asked questions

What's the difference between a 30mm and 22.5mm push button?

30mm refers to the panel hole diameter. 22.5mm is the smaller modern standard. They're not interchangeable — the panel hole determines which size fits. 30mm is classic industrial; 22.5mm is more common on newer equipment.

Do PRT push buttons work with Marathon, PTR, and Wastequip compactor control panels?

Yes. The two standard sizes (30mm and 22.5mm) are used industry-wide. PRT buttons mount to standard panel holes and connect to standard contact blocks.

How do I replace an emergency stop button on a compactor?

Cut power, unscrew the existing button from the panel, transfer the contact block to the new button, and re-mount. Verify the e-stop wiring connects to the safety circuit (not just the cycle-start circuit) — if it's a basic stop button instead of a safety-rated e-stop, replace with a safety-rated unit.

Are illuminated push buttons available?

Yes. PRT stocks LED-illuminated buttons in standard colors (red, green, yellow, blue, white) for both 30mm and 22.5mm sizes. Specify the voltage (typically 24V DC or 120V AC) when ordering.

Related parts categories