Old 3-connector capcitor replacement

Hi,

I need to replace a capacitor from an old sewing machine footpedal. The full writing on it says:

EROID
0,05 µF
+ 2 x 1000pF(b)rot
250 V~
-50° / +100°
F 1175
E

2 black leads come out of one end, one red lead out of the other. It's one and a quarter inches long, and just under half in inch diameter.

The red lead was connected to ground, the black leads to each of the output pins

I think that means that it's 0.05µF between the 2 black leads, and 1000pF between the red lead and each of the black leads.

I have 3 questions:

1 - Is my analysis of the relative capacitance between the leads correct?

2- Do equivalents of this exist any more?

3- If I can't find an equivalent, can I just make up a triangle of 2 x 1000pF and one 0.05µF as an equivalent?

Thanks a lot,

Andy

[edited to change question 3, and my suggested solution]

by OPBoot
July 17, 2021

It can be a special topology to accomodate AC voltage (hint, the tilde for the voltage spec), or it can be a mini filter, such as if you search Internet for "murata 3 terminal capacitor".

Could not find any info about a company name EROID, but maybe you could be luckier looking for the sewing machine maker.

by vanderghast
6 days, 22 hours ago

Thanks for the response!

I found a photo of a very similar cap, which acutally had the schematic I described printed on the outside, so it seems that they do (or did) exist. So...

  • given that it seems to be only a power smoothing cap,

  • and I've tested the sewing machine with the cap completely removed and it runs fine,

I've ordered some individual caps and will give it a go.

Yeah - I did ask a forum specifically for this machine, but they're sewing people rather than electronics people, it seems :-)

by OPBoot
6 days, 19 hours ago
Add comment...

Please sign in or create an account to comment.


No Answers

No answers yet. Contribute your answer below!


Your Answer

You must log in or create an account (free!) to answer a question.

Log in Create an account


Go Ad-Free. Activate your CircuitLab membership. No more ads. Save unlimited circuits. Run unlimited simulations.

Search Questions & Answers


Ask a Question

Anyone can ask a question.

Did you already search (see above) to see if a similar question has already been answered? If you can't find the answer, you may ask a question.


About This Site

CircuitLab's Q&A site is a FREE questions and answers forum for electronics and electrical engineering students, hobbyists, and professionals.

We encourage you to use our built-in schematic & simulation software to add more detail to your questions and answers.

Acceptable Questions:

  • Concept or theory questions
  • Practical engineering questions
  • “Homework” questions
  • Software/hardware intersection
  • Best practices
  • Design choices & component selection
  • Troubleshooting

Unacceptable Questions:

  • Non-English language content
  • Non-question discussion
  • Non-electronics questions
  • Vendor-specific topics
  • Pure software questions
  • CircuitLab software support

Please respect that there are both seasoned experts and total newbies here: please be nice, be constructive, and be specific!

About CircuitLab

CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.