Circuit Breakers Source

[Dave S]

Fred,

I second DF4's recommendation for Stein air. Excellent service, they know what they are doing and have a solid background and a tremendous interest in experimental aviation. They have been my go to guys for encoder calibration also.

As to adapting auto fuses to aviation use - maybe some have been done with success; however, I have seen a few more corrosion issues/high resistance connections with auto fuse holders and adaptations than I would care get involved with. Just my opinion.

[Eric Page]

It depends a bit on what kind of breakers you're after. If you want the kind that can be pulled to open the circuit (like the Tyco W23 or one of the various Klixons), you're pretty much stuck at $20/ea., minimum.

If you're happy with a fuse-replacement style breaker that is only push-to-reset, there are other options that are much cheaper:

- Tyco W54: 5A - 30A, $4 - $6 ea.

- Tyco W57: 5A - 20A, $3 - $6 ea.

- Tyco W58: 1A - 30A, $7 - $11 ea.

If you have the space and want a snap-in mounting style with a bezel:

- Tyco W28: 250mA - 20A, $5 - $10 ea.

Whatever you choose, look at the time-vs-current trip curves in the datasheet to be sure they're in the same ballpark as typical "aviation" CBs like the Tyco W23 and the Klixons (hint: they're virtually identical).

In all cases, watch part numbers carefully to be sure you're getting the type of plunger markings, mounting bushing, hardware and terminals you want (don't rely on the photos).

[4Hummer]

I get mine here in Canada|

https://www.mouser.ca/Circuit-Protec...reaker&FS=True

[Delta Whisky]

Why leave behind your prior approach? Considerations of required panel area, cost, terminations, weight, simplicity, etc. made me go with a fuse panel. Not my original idea, saw something similar in a RV-12. I use lighted fuses that light up when they blow. Just thinking out loud.Attachment 27899

[Maverick]

I looked thru all 32 pages of the Show Us Your Panel message string. I saw yours, DW, and one on page 20 by mr bill. I probably would stay with fuses if I could find a way to make it look nice. You and mr. bill both appear to have done so but, I haven't found buss bars that are conducive to pleasing aesthetics. If you know of a supplier that would have something that would work and look clean, I'd appreciate the info.

[Delta Whisky]

Maverick - mine is an Eaton Bussman 15305-1-6-0. I checked where I bought mine and they have similar items but not that part number. My search engine found them at a variety of sources though.