How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask VideoTech Your Own Question

VideoTech, Technician
Category: Consumer Electronics
Satisfied Customers: 5310
Experience:  30 years servicing Video Electronics
Type Your Consumer Electronics Question Here...
VideoTech is online now
A new question is answered every 9 seconds

I have a Sears automotive battery charger that has stopped

Customer Question

I have a Sears automotive battery charger that has stopped charging. The indicator panel still works. Tne webpage shows an SCR and a circuit breaker that are no longer available and no substitutes or specifications are shown. The transformer is OK.

Do you have any info on part numbers, spec's, details, etc. that I could use to ID the SCR or circuit breaker for replacement?

Model # XXXXX

Jim [email protected]
Submitted: 4 years ago.
Category: Consumer Electronics
Expert:  VideoTech replied 4 years ago.

Take a close look at the body of that SCR. There's an Alpa-number on it that we cross over to parts suppliers.


Here's an example of an SCR part number --



Customer: replied 4 years ago.
will look and send SCR number tomorrow AM Jul 9. Charger not accessible right now.
Expert:  VideoTech replied 4 years ago.
Customer: replied 4 years ago.

The numbers on the SCR (actually 2 on the board) are:


1141S board label.

S838 and 41024 both numbers on both SCRs..


there are no mfgr ID symbols on either SCR , the numbers above are the only identification. The output circuit breaker is rated 12VDC and 50A. Maybey this will help confirm the rating of the SCRs.


Thanks for your help. I'll try to be faster to respond.

Expert:  VideoTech replied 4 years ago.

Well the cross references didn't help, but a 50 amp SCR is going to have some major spade lugs and wires connecting it. At the bottom of this data sheet is a drawing of the SCR


There's actually 3 types of packages that SCRs come in







And then of course the big square black units with spade lugs on top.


Can't find a picture of that.


Customer: replied 4 years ago.
well I think we did as much as anyone could to ID the SCRs. Thanks for giving it a shot. your efforts are appreciated.
Expert:  VideoTech replied 4 years ago.

I think you miss the point. If the numbers aren't simply look at the Type, then select a current rating.. If it has a 50 amp circuit breaker on the 12 Volt supply (not the AC side) then the SCR is 50 amp.


Scrs are nothing more than an on/off switch for DC voltage, with the benefits of being a rectifier for AC too.


And if you like the charger for "fond memories", its worth resurrecting it. It's not as easy as walking into Sears and stating the part numbers and them having it stocked.





Customer: replied 4 years ago.

Nope, there is no sentimental value for this charger, I just like to make things work, even if I need to fix them occasionally. The 2 SCRs pictured in your response are not like the two in this charger. These are similiar in appearence to the top device, yet bulkier. I have no additional info that may help.


I am ready to call it done. I am satisfied with your effort even tho the charger is not working, and that is fine. I am completely satisfied and do not want to pursue the search any further. I want to say thank you and if I have another problem in your area of expertise I have will have no reservations in requesting you as my tech expert. The service and response were excellent.


Expert:  VideoTech replied 4 years ago.

Ok, I just wanted you to understand that there's nothing "Special" about SCRs or long as you have the Amp rating and can trigger the gate/switch... it's good to go. Nothing else honestly needed but the Gate switch.



JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
< Previous | Next >
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
  • I love this site! $9 instead of a repairman or new/used frig can't be beaten. This older woman will worry less now that she knows about this site. Bless you all. Windy USA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY

Meet The Experts:

  • John


    Engineer and electronic enthusiast for more than 12 years.

    Satisfied Customers:

    I am here to help you!
< Last | Next >
  • John's Avatar


    Engineer and electronic enthusiast for more than 12 years.

    Satisfied Customers:

    I am here to help you!
  • Steve G.'s Avatar

    Steve G.


    Satisfied Customers:

    VP of electronic repair company. Audio nut since 1974. Home Theater advisor. Vinyl holdout!
  • Louie's Avatar



    Satisfied Customers:

    25+ yrs. experience in the field and 5+ yrs. online, down to component level.
  • Russell H.'s Avatar

    Russell H.

    Service Tech

    Satisfied Customers:

    8+ years of professional experience
  • Pete's Avatar


    Electronic Engineer

    Satisfied Customers:

    Over 16 years of experience installing and repairing electronics.
  • Rod's Avatar


    Systems Engineer

    Satisfied Customers:

    FCC Commercial Licenses, BSCS, ASEET, 40+years Electronics & Communication Systems
  • Martin's Avatar



    Satisfied Customers:

    16 years, include works in aluminium plant, industrial machinery, military weapons, programming