New Potter & Brumfield (Tyco) 20A / 20 Amp Thermal Trip Circuit Breakers, Maximum Voltage 32VDC / 250VAC, Panel Mount Snap-In, Part Number W28-XQ1A-20.  Each bid quantity is for a Lot of Two (2) Breakers.  You may bid / buy any number of lots, up to the total quantity available above.

These were purchased at an electronics supplier liquidation recently, and they were brand new in the original factory boxes.  We packaged them in heavy Ziplok bags for resale.  These are not used as a switch; rather they remain set continuously, and only trip when there is an overcurrent condition in the circuit.  This allows you to use an ordinary toggle or rocker switch elsewhere in the circuit, without having to trip and reset your circuit breaker each time you turn something off and on.  Breakers can be located remotely to avoid tampering and equipment damage caused by inexperienced operators.  Takes up very little space on your control panel, yet the white trip indicator (picture #1) is clearly visible, even in low light conditions.

For mounting panels thicker than .062" / 1.574 MM, use Tyco part number 55-025B Internal Tooth Push-On Lockwasher (not included).

According to the calipers:

Bezel (face) dimensions:  .750" x .750" (19.05 MM x 19.05 MM)

Body profile:  .602" x .524" (15.30 MM x 13.32 MM)
[Takes about a 5/8" / 15.88 MM diameter round or square mounting hole]

Mounted depth, including terminals:  1.890" / 48.00 MM

Terminals:  1/4" / .250" / 6.35 MM Quick Connect (or solder)