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P1 Momentary Switches

From $23.70 to $24.85
MIL No. Otto No. Description Part Number Price Buy
MS25089-1CRP1-32121Threaded Bezel, Red
11-00748
$24.50
Quantity
MS25089-1CP1-32122Threaded Bezel, Black
11-00749
$23.70
Quantity
MS25089-1CWP1-32129Threaded Bezel, White
11-00750
$24.85
Quantity
MS25089-1ALP1-12121Press Fit, Red
11-00745
$24.85
Quantity
MS25089-1AP1-12122Press Fit, Black
11-00746
$24.85
Quantity
MS25089-1AWP1-12129Press Fit, White
11-00747
$24.50
Quantity
Subtotal $0.00
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Overview

The P1 is a sealed, dustproof, snap action, military grade switch ideal for switching low level up to 10 amps. It features screw terminals, and includes screws, lockwashers, and solder lugs. MIL qualified. Dustproof, snap action, screw terminals, rugged reliable construction.

Electrical: (at 28VDC or 115VAC, 60/400 Hz.)
Load Amperes Life (Nominal)
Resistive 10 25,000 cycles
Inductive/Motor 5 25,000 cycles
Lamp 3 25,000 cycles
   
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Features

  • Button sealed with patented “rolling sleeve” principle
  • Contact area sealed at button & terminals
  • Less than 25mΩ contact resistance
  • Ideal for low level switching as well as up to 10 amp duty
  • Positive tactile feedback
  • Frequently Purchased With
  • Customers Also Viewed

Reviews

These look to be a great improvement over the micro switches that are being replaced. I really appreciated the outstanding customer service provided.

Dennis N Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

January 2, 2024

Built like a tank! Should last for years. A little bigger then you might think.

Phil W Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

November 8, 2023

Excellent Built Robust Switch. I used it for a autopilot disconnect switch on a Dynon Skyview install. I like that the wires attach by screws with lock washers. It comes with everything needed to attach switch and wires.

Jack S Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

April 22, 2023

Very nice switch but turned out to be too large. Returned.

James A Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

April 9, 2023

Substantial “click’ when pressed lets me know it is working. Well built switch!

John B Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

January 18, 2023

Replaced old small push to talk switches in the yoke. This is a great replacement option however, ensure you have enough space in the yoke as these are slightly wider and taller than others. Really nice feel and look. A real pilots PTT.

Nicholas Verified Purchase

P1 MOMEN. SWITCH P1-12122 BLK

May 27, 2022

I havent used the button yet, but it appears and feels very high quality, button has great snap action. The button was shipped quickly and packaged well. I would and plan to purchase more of these buttons.

Christopher G Verified Purchase

P1 MOMEN. SWITCH P1-12121 RED

March 30, 2022

As expected...quality part. Includes the tiny screws as well

Stuart S Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

January 6, 2022

I have not installed it yet but it appears to be heavy duty. Its not cheap, I think this push to talk is going to go the distance. For those who may from time to time be a little heavy on the button push this one if for you! I cant wait to install it as I think it will be the last PTT I ever need to put in (after I purchase another one for the back seat as well). This switch is not for the tender trigger fingered, definite not going to press this one down by accident even if you are palming the stick and its on top. No need for a safety on this one )

Charles M Verified Purchase

P1 MOMEN. SWITCH P1-32122 BLK

December 8, 2021

Solid PTT switch with a good responsive feel.

Nicholas W Verified Purchase

P1 MOMEN. SWITCH P1-32121 RED

October 16, 2021

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: For part number 11-00745 what is the diameter size of the button press fit body and is the whole item red or just the actual button?

The diameter size of the button press fit body is 9/16"(.562") and the button is red while the body is black.

Q: What does momentary mean? What does press fit mean? What does SPDT mean?

Momentary means you have to hold the switch down to activate it. As soon as you release the switch it turns off. Press fit means that there are no threads and simply pushes into an exact size hole. SPDT means single pole double throw. This is a switch that only has a single input and can connect to and switch between 2 outputs.

Q: Are the two P1 switch terminal posts (or terminal flanges) marked ground & positive?Im not very knowledgeable about these matters. By the way, 1/2 was too small, I drilled a 9/16 into my airplane control yoke & wrapped a piece of scotch tape around the cylinder and the switch fit perfectly and tightly.

No, this switch can be wired in either direction.

Q: For example, otto no. P1-12121 (spruce pn 11-00745) - according to the spec. sheet the first 2 to the right of the hyphen indicates a screw connection not a solder connection, yet your description for all these switches says they have solder connections. The otto no of this switch with a solder connection should be P1-11121. Please confirm whether 11-00745 has a solder or screw connection?

The switch has screw terminals. Included with the switch are screws, lockwashers, and solder lugs.

Q: Any reason why this shouldnt work with a 14V system?

No, this should work fine in a 14 volt system.

Q: What size mounting hole does the P1-12122 require?

.625 minimum.

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