Wanted: Electrolytic Caps - Sprague D49438 or Equiv. - Page 1
Forum section: electronics / general

author: el_tubal
author_rank: Newbie
timestamp: January 27, 2021, 10:13:01 pm
content: 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 equivalent2250 μF150 VDC+5% toleranceScrew terminals - ~0.819" spacing2" dia x 4-3/16" LongTIAPeteChicago, IL USA

author: bdunham7
author_rank: Super Contributor
timestamp: January 27, 2021, 10:22:47 pm
content: 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.

author: el_tubal
author_rank: Newbie
timestamp: January 29, 2021, 01:32:21 am
content: 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-ALS30A222KF400These 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!PeteChicago, IL USA

author: Kranidell
author_rank: Newbie
timestamp: January 24, 2022, 02:14:31 pm
content: Hello PeteDid 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.

author: Kranidell
author_rank: Newbie
timestamp: January 02, 2023, 12:19:39 pm
content: Hello PeteDid 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.

author: factory
author_rank: Super Contributor
timestamp: January 02, 2023, 01:50:14 pm
content: 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

author: Kranidell
author_rank: Newbie
timestamp: January 11, 2023, 02:33:07 pm
content: Anyone can share Pete contact detail as he has not signed in for a while?

author: coppercone2
author_rank: Super Contributor
timestamp: January 15, 2023, 08:51:44 am
content: 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.