Part# 0146


This high-quality rheostat is used in production aircraft to dim instrument panel lights. Size: 1-9/16" dia. x 2-1/4" long . Mounts in 3/8" dia. panel hole. Shaft is 1/4" dia. with flat for knob set screw. New manufac. Power Rating: 25W.
0-8 OHM or 0-15 OHM models available.
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WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.

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This is a well made switch.

Nick W
October 21, 2020

Smooth operation and easy to install. Quality materials.

Thayne R
September 22, 2020

You gotta love Ohmite! Solid product at a low cost.

Don W
August 25, 2018

I gave it 5 stars because it works just as described, but it has one drawback that I didnt foresee. It does not turn off. At the lowest setting, the panel lights are always on dim. I needed a rheostat with an off position and this didnt fit that need. The description does not indicate that it has no off position.

Dan J
December 30, 2015

Nice switch/rheostat, built well. As others have said there is no off position. I will bet its not returnable, so Im out $60.Im going to look for another rheostat instead of wiring in an on/off switch.

William B
August 17, 2020

Disappointed that the product does not come with a knob. Description could have been more explicit that a knob is needed.

Steven G
September 13, 2018

Susceptible to the coils severing if there is any sort of a short in the lighting system. $60 down the drain.

Tanner M Verified Purchase


February 5, 2022


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: Can these dimmers be used for 220VAC and 24VDC systems?

Yes, they will work for both.

Q: Does this rheostat include a switch as in a Piper?

It does not have a on-off switch. It is power in, power out and the ground.

Q: Will the Panel Light Dimming Rheostat PN# 0144 works in a 12VDC system?

This part is based on watts not voltage as it has a power rating of 25W so can be used in a 12 or 24 volt system.

Q: For the panel dimming rheostat 0144 or 0146, explain why one would choose one ohm model over another?

The lower the ohms the higher the amps. 8 ohm is 1.77 amps and the 15 ohm is 1.29 amps.

Q: Will turning the rheostat all the way down turn the lights off?

For the rheostat, this will not turn off the lights, it will only dim.

Q: Is this FAA PMA approved?

This product does not hold any FAA/PMA approval.

Q: Will either of these rheostats work with the electro luminescent lighting systems you sell?

This lighting systems require the 6002 dimmer.

Q: Does the rheostat come with a wiring diagram?

No it does not.

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