Wanted: Electrolytic Caps - Sprague D49438 or Equiv.

[el_tubal]

I need six (6) of these to replace some clapped-out caps in a small Hughes resistance welder power supply:

Sprague D49438 aluminum electrolytic capacitor or equivalent
2250 μF
150 VDC
+5% tolerance
Screw terminals - ~0.819" spacing
2" dia x 4-3/16" Long

TIA

Pete
Chicago, IL USA

[bdunham7]

Measure the screw hole spacing again very carefully, center to center.  Hopefully it is 22mm or 7/8".  It's going to be tougher if it really needs to be 0.819 as you specify.  Do they go in a PCB or are they connected some other way.  Then go to Mouser or Digikey and start looking at capacitors by specs.  I would start with the termination type (screw) and the diameter or lead spacing.  You will be OK with more voltage and the tolerance (are they really +/-5%??) shouldn't matter that much.

[el_tubal]

Confirm the screw terminals are spaced at 0.819" between centers. Measured quite accurately, btw.

The closest I've found is Digi-Key 565-E36D151HPN232KCA5U-ND and Mouser 80-ALS30A222KF400

These both have 0.875" (22.2mm) lead spacing. Six are ganged up in a pcb which I'd rather not hack up, though I may have to. Weird, but the tolerance is imprinted with +5% only. I'm guessing it means +5/-0%? I've seen other cap tolerances rated similarly asymmetrically, dunno why. 

Thanks!

Pete
Chicago, IL USA

[Kranidell]

Hello Pete
Did you find capacitors for your Hughes Welder? Did they work for you. I have same welder Hughes  HRW250 using 15 Sprague capacitors. Did they work for you.

[Kranidell]

Hello Pete
Did you find capacitors for your Hughes Welder? Did they work for you. I have same welder Hughes  HRW250 using 15 Sprague capacitors. Did they work for you.

[factory]

Pete hasn't logged in since 30th Jan 2021, best to try sending a private message, as they probably won't see this otherwise.

David

[Kranidell]

Anyone can share Pete  contact detail as he has not signed in for a while?

[coppercone2]

drill em and solder rivets/copper sheet into place, I think it might work, I got nuts dealing with those chassis capacitors. Replacing a section of PCB is better then trying to find new old stock capacitors that are some weird obsolete crap for power electronics.  Seriously being at the mercy of hole spacing, considering the complexity of those machines, totally shits me.  Especially if its crippling a welding machine. 

the system will not be taken out of service because a 10-32 screw is wrong.  . Its like being severely trolled by simple conductive structures. Its not a RF MMIC, its a piece of copper. Fuck that.