micro switch

Can anyone identify this micro switch ?

i have lots of these all faulty because the spring has done a runner

Marquardt 1010 series. Out of stock at RS though Marquardt

Google image search for 1010 microswitch brings up plenty of them

Brian G

brilliant Brian

now to find some in stock somewhere

Hmm lots availble but at high prices

Mouser came up trumps though at a reasonable price for 10 switches

but only shipping option  is £12 ( ouch)

Many thanks to Brian

Edited By Ian Parkin on 01/07/2020 13:14:31

Little wonder they discontinued them. Have you seen the insulation resistance of those things!

.

Insulation resistance (new condition)
> 100 MOhm (500 V DC)

Hi Ian, If possible, I would recommend changing to a modern enclosed microswitch. I have used Omron's D2F series in many projects with great success. About 1 UK pound retail, probably 50 p or less each from an Omron distributor in UK. Many styles of lever and terminals available, several operating forces and volt / amp combinations up to 5A at 250 VAC. These are good units with small size high performance and quality at a good price. No connection to Omron except as a very satisfied user. (if you still use a computer mouse chances are it has two D2F's in it, or a cheap knockoff of one - billions of them in service worldwide)

**LINK**

Try again, you clearly didn’t read the link. Probably as usual, when it suits you. Here is what it actually says, just for you.

“They have a contact resistance of <100 mΩ and an insulation resistance of >100 mΩ. “

In my book, that is a mega small resistance.😆

.

Funny, that ^^^

I actually copied and pasted the text directly from the document linked on the RS Components page.

Perhaps [prior to apologising for yet another snide remark] you could try reading the definitive document.

MichaelG.

.

https://docs.rs-online.com/5321/0900766b810168f7.pdf

Edited By Michael Gilligan on 01/07/2020 20:41:19

Jeff

they are fitted in this piece of av equipment

and theres 7 of them fitted in each one

made in Germany in the 70’s and 80’s by kodak

its really tricky to retrofit new styles of switch

but as i said they all seem to lose the spring

they only carrying small currents at 24v

.

In fact, all that would tell you is that the insulation resistance is greater than a small resistance.

... Which would be about as pointless as the crass assessment given ‘in your book‘

MichaelG.

You are both correct.

The homepage as linked to by Brian G & NDIY for these switches shows: Insulation Resistance. >100 mΩ whereas the actual specification docs linked to by Michael say it is > 100 MOhm.

Edited By V8Eng on 01/07/2020 22:19:37

.

Yes, I know [thanks] ... It’s the snide digs that I find objectionable

[quote] Try again, you clearly didn’t read the link. Probably as usual, when it suits you. Here is what it actually says, just for you. [/quote]

MichaelG.

Edited By Michael Gilligan on 01/07/2020 22:28:07

Maybe use a short length of clock mainspring with a couple of holes either punched or drilled through in a simple jig.

Bill

Yes I think we all have enough on our minds at this time without seeing nastiness on here.

Edited By V8Eng on 01/07/2020 22:34:44

Learned something today! Been doing electronics on and off for 50 years and never realised that people used naked microswitches!

You obviously didn't frequent surplus shops Mark. Have a couple of these as limit switches on a radio control "Servo" I made around 1960. Were scavenged from an "Aerial tuning unit" ex RAF, difference being the insulator is a paxolin stack.

Regards Ian.

Edited By Circlip on 02/07/2020 12:03:47

You can buy small long lever microswitches that I think would replace these if the lever was bent to suit.

Martin C

RS part 0150710 for example 

Edited By Martin Connelly on 02/07/2020 17:59:43