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AB 30MM 3 POS SS SPRING RET CEN STD KNOB

AB 30MM 3 POS SS SPRING RET CEN STD KNOB
Part # : C.AB30.J91
Weight: 0.2 LB
Any
ALLEN-BRADLEY 30MM THREE POSITION SELECTOR SWITCH. Standard knob with spring return to center.

ASMB AB 30MM 3 POS SS SP RC STD W/1NO1NC

ASMB AB 30MM 3 POS SS SP RC STD W/1NO1NC
Part # : A.AB30.J91A
Weight: 0.1 LB
Any

ASMB AB 30MM 3 POS SS SP RC STD W/2NO2NC

ASMB AB 30MM 3 POS SS SP RC STD W/2NO2NC
Part # : A.AB30.J91B
Weight: 0.1 LB
Any

30mm Selector Switches for Compactor Panels

Replacement 30mm selector switches for industrial trash compactor control panels. 2-position and 3-position rotary selectors for function and mode selection. Drop-in for standard 30mm panel cutouts.

What this page covers

Selector switches let the operator choose between functions — typically running mode (manual vs. automatic), cycle direction (forward vs. reverse), or sub-system selection (which cylinder to actuate). They're rotary switches with a knob handle, distinct from key switches (which use a key) and push buttons (which are momentary).

PRT stocks 30mm selector switches in 2-position and 3-position configurations with standard contact block options.

How to choose

Match by position count, contact arrangement (maintained vs. spring-return), and handle style (standard knob, lever, or guarded).

For multi-position selectors on cycle-critical functions, consider spring-return designs that revert to a safe default position when released.

In stock options

  • 2-position selector switchOff/on or A/B function selection.
  • 3-position selector switchThree-mode operation.
  • Maintained positionHolds selected position until manually changed.
  • Spring-returnReturns to a default position when released.
  • Standard knob handleMost common operator interface.
  • Guarded handlePrevents accidental position change.

Frequently asked questions

What's the difference between a selector switch and a key switch?

Selector switches are knob-operated for function selection. Key switches require a key for authorization. Both can have multiple positions.

Should I choose maintained or spring-return selector switches?

Maintained for mode selection (the switch stays where you put it). Spring-return for momentary functions (the switch returns to default when released).

Are PRT 30mm selector switches OEM-compatible?

Yes. Standard 30mm panel cutout means direct drop-in for Marathon, PTR, Wastequip, Harmony, and SP Industries compactor panels.

How many positions can a 30mm selector switch have?

Standard configurations are 2-position and 3-position. 4-position selectors exist for specialty applications — available on order.