Circuit Breaker Part # Help

[Ragsf15e]

Hello, I’m replacing some very old circuit breakers that are causing voltage drop between my alternator and my main bus.  Unfortunately I can’t see a modern equivalent part number for the 70 amp alternator circuit breaker in the maintenance manual.  The breaker itself looks like this (MS39065-3).

I’d also like to have the 50amp aux bus breaker on hand.  It looks like a standard klixon, but I can’t quite see the part number?

[EricJ]

The top one appears to be a PDLM-70.   

 

[Ragsf15e]

2 hours ago, EricJ said:

The top one appears to be a PDLM-70.   

 

Ahh, thanks.  PDLM seems to be the magic letters I couldn’t find.  That comes up easily on Spruce.  Now if it wasn’t $220, that would be terrific!

Thanks for the help!

The other one is either a Tyco or Klixon 50 amp.  One is $22, one is $184.  I’m just not lucky enough for it to be the $22.

[Yetti]

The -3 usually means 3 amp. 

[MikeOH]

1 hour ago, Yetti said:

The -3 usually means 3 amp. 

Not is this case.  MS39065 is a long cancelled MIL spec.  The -3 denotes 70 Amp:

 

Edited December 8, 2020 by MikeOH

[Ragsf15e]

10 minutes ago, MikeOH said:

Not is this case.  MS39065 is a long cancelled MIL spec.  The -3 denotes 70 Amp:

 

Nice, where’d you find that?  That’s it for sure, but I think the new part is the PDLM that @EricJ said.

[MikeOH]

22 minutes ago, Ragsf15e said:

Nice, where’d you find that?  That’s it for sure, but I think the new part is the PDLM that @EricJ said.

Very useful site for military specs, both old and current: https://quicksearch.dla.mil/qsSearch.aspx

In the case of this part it gets even worse, the suggested spec, MIL-C-13516/4 was also cancelled!  In that spec, you will find that there is not a subsequent MIL spec, but a reference to a CID(Commercial item description), AA55571/04-004 , of which PDLM-70 is, I believe, conforming (but, you'd need to verify that part's specifications to the CID number to be certain.  (Sorry, I'm too lazy to track that down!)

 

Edited December 8, 2020 by MikeOH

[Yetti]

21 hours ago, MikeOH said:

Not is this case.  MS39065 is a long cancelled MIL spec.  The -3 denotes 70 Amp:

 

Sometimes can maybe or not

[MikeOH]

Just now, Yetti said:

Sometimes can maybe or not

You said, "usually means" And, I said, "Not in this case"

What are you getting at with this post????

[Yetti]

7 minutes ago, MikeOH said:

You said, "usually means" And, I said, "Not in this case"

What are you getting at with this post????

Working on my appropriate disclaimer or maybe should have added when working with Potter Brumfield or Klixon