I’m trying to use a CKN11154-ND rotary switch from DigiKey site to do some source power selection to a pair of monitors. I have 3 sources and bought this to cycle those. Odd fact though is the spec diagram to me assumes a couple common poles for the double pole setup. But with the switch in my hand it seems there is no common pole and it instead cycles from pin 1-2 to pin 2-3 to pin 3-4. For the selection on a single pole. This doesn’t work for my use case and no other option fits our use of 220v AC compatibility. Am I understanding the switch correctly or is there another way to use this to have a common out for both poles so I can wire up some displays to run of the unique sources.
Thank you for your inquiry.
You’re describing how the switch should work.
The contacts that are connected would be ‘adjacent’, shown highlighted below. Your version just wouldn’t have position 4 or 5. The highlighted round contact in the middle is what connects the two adjacent terminals.
I don’t see that we have a 220V or higher version of the type you need unfortunately.
1 Like
Hey Kristof,
And I now understand what you are referring to in the mechanism. So yes as I suspect this doesn’t have a single common output. So sadly won’t work for my use case as all.
As for another with common output pins, are there any versions rated for 120v. I found same with this model, on the spec sheet they do have ratings up to 240V but with varied Amperage rating.
Very interesting switch configuration I’ve not it encountered before. Suspect I could have accidentally bought it for switching two circuit commons to three functions myself.
So I learned something new, when a switch is listed as DP3T, Adjacent Contact, there is no way to use it like a DP3T toggle switch or common contact DP3T rotary.
Looking at the internal configuration a bit further, it would appear that the “4 Position” version, the R20407RR02Q would be capable of switching two poles between three different contacts. This part has a stopper which allows the shaft to rotate only between positions 1 through 4. I could be missing something obvious (not unlikely), but could one not connect as shown in the diagram below to create a DP3T?
Important note: The R20407RR02Q does not have epoxy sealed contacts, as the R20307RR02QE has.
So, tie pins 6 and 8 together for one common (“A”) and 1 and 3 together for the other (“B”). The only drawback is that the second and third rotary position would both connect pin 2A to common “A” and pin 2B to common “B”. Not ideal, but it should be functional.
If you require epoxy sealed contacts, here are some other switches to consider. Each of these will either have extra pins or extra positions which would have to be either left unconnected or made redundant with an adjacent position.
C&K / Littelfuse Panel-mount A series: with 1A switching / 5A carry @ 250Vac Silver contacts
- A20405RNCQK DP4T, 0.5" shaft, PC pins
- A30305RNZQK 3P3T, 0.5" shaft, Solder lug contacts, Splash-proof bushing seal
- A30315RNCQE 3P3T, 1.5" shaft (plastic, cut-able), PC pins
1 Like
Thanks for that recommendation. Sadly for a fix on a clients vessel this won’t be an adequate fix. I’ll just need to keep looking to find a common output model hopefully.
I removed your personal information. The TechForum is frequently scraped by bots.
Hi zachary,
Just in case I wasn’t clear, the three other parts I mentioned from the “A” series are common pole types rather than the “Adjacent Contact” type. The negative to them was either an extra rotary position, or an extra pole and set of contacts. They will all have extra pins, but would have a “normal” common pole for each group of contacts.
If this is still unacceptable, I understand – I just wanted to make sure that it was clear that they were not also “Adjacent Contact” types like the “R” series.
Thanks for the follow up David. I did miss that in the original comment. Here I went through and found this switch on the A series. A10303RNZQ. Would you believe this is what I need. Sad as my previous discussions with the phone support staff didn’t direct me to this before. But better late then never. Thanks for the help.
OK, I didn’t realize you only needed pole. That simplifies things!
Make note that the A10303RNZQ does not have epoxy sealed contacts, if that is important in your application.
The A10305RNZQK is a similar part which does have sealed contacts and a splash-proof bushing seal.