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.
You gotta love Ohmite! Solid product at a low cost.
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.
Disappointed that the product does not come with a knob. Description could have been more explicit that a knob is needed.
Yes, they will work for both.
It does not have a on-off switch. It is power in, power out and the ground.
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.
The lower the ohms the higher the amps. 8 ohm is 1.77 amps and the 15 ohm is 1.29 amps.
For the rheostat, this will not turn off the lights, it will only dim.
This product does not hold any FAA/PMA approval.